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Kerala Agricultural University, Thrissur
The history of agricultural education in Kerala can be traced back to the year 1896 when a scheme was evolved in the erstwhile Travancore State to train a few young men in scientific agriculture at the Demonstration Farm, Karamana, Thiruvananthapuram, presently, the Cropping Systems Research Centre under Kerala Agricultural University. Agriculture was introduced as an optional subject in the middle school classes in the State in 1922 when an Agricultural Middle School was started at Aluva, Ernakulam District. The popularity and usefulness of this school led to the starting of similar institutions at Kottarakkara and Konni in 1928 and 1931 respectively.
Agriculture was later introduced as an optional subject for Intermediate Course in 1953. In 1955, the erstwhile Government of Travancore-Cochin started the Agricultural College and Research Institute at Vellayani, Thiruvananthapuram and the College of Veterinary and Animal Sciences at Mannuthy, Thrissur for imparting higher education in agricultural and veterinary sciences, respectively. These institutions were brought under the direct administrative control of the Department of Agriculture and the Department of Animal Husbandry, respectively. With the formation of Kerala State in 1956, these two colleges were affiliated to the University of Kerala. The post-graduate programmes leading to M.Sc. (Ag), M.V.Sc. and Ph.D. degrees were started in 1961, 1962 and 1965 respectively.
On the recommendation of the Second National Education Commission (1964-66) headed by Dr. D.S. Kothari, the then Chairman of the University Grants Commission, one Agricultural University in each State was established. The State Agricultural Universities (SAUs) were established in India as an integral part of the National Agricultural Research System to give the much needed impetus to Agriculture Education and Research in the Country. As a result the Kerala Agricultural University (KAU) was established on 24th February 1971 by virtue of the Act 33 of 1971 and started functioning on 1st February 1972. The Kerala Agricultural University is the 15th in the series of the SAUs.
In accordance with the provisions of KAU Act of 1971, the Agricultural College and Research Institute at Vellayani, and the College of Veterinary and Animal Sciences, Mannuthy, were brought under the Kerala Agricultural University. In addition, twenty one agricultural and animal husbandry research stations were also transferred to the KAU for taking up research and extension programmes on various crops, animals, birds, etc.
During 2011, Kerala Agricultural University was trifurcated into Kerala Veterinary and Animal Sciences University (KVASU), Kerala University of Fisheries and Ocean Studies (KUFOS) and Kerala Agricultural University (KAU).
Now the University has seven colleges (four Agriculture, one Agricultural Engineering, one Forestry, one Co-operation Banking & Management), six RARSs, seven KVKs, 15 Research Stations and 16 Research and Extension Units under the faculties of Agriculture, Agricultural Engineering and Forestry. In addition, one Academy on Climate Change Adaptation and one Institute of Agricultural Technology offering M.Sc. (Integrated) Climate Change Adaptation and Diploma in Agricultural Sciences respectively are also functioning in Kerala Agricultural University.
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ThesisItem Open Access Factors influencing calf growth and mortality in field and organised farms(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1994) Shaji, Antony .; KAU; Thomas, C KA study was undertaken to evaluate the system of calf raising in the field vis – a – vis that in organised farms, which included contemporary calves born in field and organised farms. Mavelikkara was chosen as the study area from where the experimental field calves were selected. University Livestock Farm, Kerala Agricultural and Dhoni Farm, KLD Board, Palghat were chosen to represent organised farms in the experiment. All the calves born in the experimental area or farms during a period of two months were included in the experiment. Calves were studied upto period of six months of age. It was observed that climatic conditions in general were similar at the three locations except that at ULF, Mannuthy relative humidity and hours of bright sunshine tended to be less than the other two locations. The male calves in the farms weighed heavier at birth and gained faster to weigh significantly more at the 12th fortnight compared to those in the field. There was no significant difference in birth weight of farm and field born female calves. However, those in the farms grew faster to weigh significantly heavier at 12th fortnight. When male and female calves in the farms and field were put together and tested at 1st, 6th and 12th fortnights, the calves in the farms weighed significantly heavier than those in the field at all stages. The daily weight gain during different fortnights was higher in the farm grown calves compared to their counterparts in the field. There was no significant difference in height of male calves in the farm and field in the 1st fortnight but was significantly higher in the farm grown calves in the 6th and 12th fortnights. There was no significant difference in the height of the female calves in the farms and field in all the three fortnights tested. Information with respect to girth showed similar trend as in the case of weight and height. In the first fortnight, the male calves in the farms measured significantly shorter in length than those in the field but by 6th and 12th fortnights, they measured significantly longer than male calves in the field. There was no significant difference in length of female calves in the field and farms during the time intervals tested. In the field, calves received generally an adequate amount of colostrum through suckling. Those in the farm were fed 2 – 2.5 kg colostrum daily from the pail. The interval between birth and first nursing varied from 15 min to 2 h in the field. In the farms, calves born during day time received colostrum within half an hour, while those born in night received colostrum the next morning. Highest daily gain and lowest mortality was seen in calves fed colostrum within 15 minutes. It was observed that the quantity of milk available to female calves in the field was comparable to that in the farms. Male calves in the field received much lesser quantity. Female calves received more quantity of concentrates compared to males except in the early fortnights. Maximum daily gain of calves was observed in sheds with concrete flooring and tiled roofs. Monthly deworming was practised upto 12 months of age in the two farms studied. In the field all calves were dewormed during the 1st month only. Thereafter, female calves were given more frequent deworming treatment. Vaccination against Foot and Mouth disease was carried out in the farms but not in the field. Good hygiene and daily grooming increased the daily gain of calves. Better growth was seen when the animals were looked after by men than women. Average dairy awareness was observed in 90 per cent of the farmers. Daily gain of calves increased with increased dairy awareness. People with high school level education maintained their calves better than those with higher or lower levels of education. Calves grown by agricultural labourers seemed to have lower weight gain. Calves reared in larger units of land had a greater daily weight gain. The mortality rate among calves was 14 per cent in the field compared to 8.5 per cent in the farms. Mortality rate of 66.6 per cent was seen no colostrum was fed. There was no mortality among calves fed colostrum within 15 minutes. Male calves had higher mortality rate than female calves. Higher mortality rate was observed in calves born to first calvers. In field mortality was higher in 1st and 5th month of age. Mortality rate was lower when calves were looked after by men compared to women. The lowest calf mortality rate was observed among calves owned by those who had high school level education. Mortality rate among calves seemed to decrease with increasing dairy awareness of owners. Mortality rate of calves was highest in shed and premises with poor hygiene (50%) followed by medium hygiene (11.11%) and good hygiene (10.5%). Similarly daily grooming seemed to reduces mortality rate (11.9%) compared to weekly grooming (25%). At the end of 6 months, 92.85 per cent of the female calves were retained by the farmers compared to only 36.36 per cent male calves, clearly pointing towards the greater future economic utility of the former.ThesisItem Open Access Effect of enrichment of environment and halothane sensitivity on performance of large white yorkshire and desi pigs(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1997) Joseph Mathew; KAU; Thomas, C KThe effect of environmental variables, halothane sensitivity and environmental enrichments in the form of wallowing, water sprinkling and access to a shaded range on various production and reproduction traits of exotic(LWY) and Desi pigs was assessed by conducting a study in Kerala Agricultural University Pig Breeding Farm , Mannuthy (UPBF). Significant correlations were found between environmental variables and important production and reproduction traits in both breeds . The incidence o f . halothane sensitivity was found to be higher in LWY when compared to that of Desi.A clear breed difference was noticed between Desi and LWY with respect to traits such as body weight,daily weight gain,body measurements, feed intake, feed conversion efficiency(FCE), weaning weight,cost of production for unit meat and weaned piglet.Environmental enrichments were found to- be beneficial for most of the traits such as body weight, daily weight gain,FCE,conception rate,live litter size at birth,birth weight,litter weight at weaning ' and average weaning weight.When halothane sensitive animals were better in FCE and growth rate, halothane resistant animals came out with good reproduction results.But positive animals with environmental enrichments performed better than negative in certain traits.The biochemical traits associated with halothane sensitivity were inconsistent.But clear trends with breed and genetic groups existed between halothane positive and negative animals.An apparently clear interaction between breeds, genotype and environmental enrichments were niticed in certain production and reproduction traits.Provision for access to a shaded range was found to be beneficial for fattening pigs with respect to FCE and growth rate.Wallowing and water sprinkling have got negative effect on these traits.But for reproduction traits all the above enrichments had beneficial effeet.Based on the observations and the results suitable combinations of various environmental enrichments for different breeds, genotypes and purpose were’ designed which may be used as tools for developing managemental systems under different situations.ThesisItem Open Access Analysis of management systems in homestead dairy production units(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1995) Sudheer, S; KAU; Rajagopalan, T GThe present study was carried out with a view of estimating objectively the existing practices of management components of inputs and cost of milk production in the rural unorganised and organised areas The study was carried out in Kalady panchayat of Ernakulam district The required data was collected from the households by direct observation and personal interview using a pre tested schedule Cattle buffalo and goats were the livestock species mainly reared by farmers Most of the dairymen had a single cow unit A reduction m herd strength was noticed in all the holdings during the last five years Majority of farmers raised their own replacement stock Regarding purchase of animals farmers generally preferred adult cows than heifers or calves Farmers considered attributes like milk production appearance and confirmation colour temperament and age of animals price and also his financial position before purchasing animals Majority of households had pucca cattle sheds and the remaining had kutcha sheds Lean to type houses were more in number than independent houses as it was easier to construct and incurred low construction cost Most of the sheds had feeding mangers The standing space provided for cows in the sheds were more than the space recommended and the width of manger was less than the space recommended by both KAU and ICAR The types of feed fed to livestock are compounded feed concentrate cakes roughages and crop by products and residues The feed stuffs were mainly purchased from private shops markets or co operative societies None of the farmers purchased green fodder they mainly depended on fodder collected from field bunds and other agricultural lands The study revealed the allocation of feed stuff It was higher for animals m milk followed by pregnant and dry cows and heifers It was observed that dairymen of both organised and unorganised sectors fed DCP and TDN m excess of NRC recommendations More attention was bestowed on the feeding of female calves than male calves as majority of farmers were interested m raising replacements In the study area AI was the predominant practise in breeding The study revealed that a large proportion of dairymen were not aware of heat signs and the right time for inseminating their animals The longer calving interval was due to poor heat detection conception failure and deliberate skipping of heat by farmersThesisItem Open Access Comparative draught capacity of cattle and buffaloes(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1994) Anil, K S; KAU; Thomas, C KThe draught performance of Kangayam bullocks were compared with that of graded Surti buffaloe bullocks under the agro climatic conditions of Kerala with a hot humid tropical climate Two pairs of adult Kangayam bullocks and two pairs of adult graded Surti buffaloe bullocks were used for ploughing both dry land and wet land at the rate of four hours a day during the summer season Physiological responses like respiratory rate pulse rate and rectal temperature and haemotological parameters like haemoglobin per cent erythrocyte sedimentation rate packed cell volume lactic acid and plasma bicarbonate were estimated before work immediately after work and after one hour of rest after work The dry matter intake and water intake on days of work and on days of no work were also measured and compared Other parameters like the area ploughed in one hour average speed of walking stride length and traction force developed during ploughing were also compared between the two species The buffaloe bullocks had significantly lower physiological responses before the start of work when compared to that of indigenous bullocks As a result of work the physiological responses increased significantly in both species The values were higher for buffaloes during dry ploughing The physiological responses including rectal temperature of buffaloes increased to a level indicative of distress due to heat stress There were also other signs of distress like frothing and drooling of saliva and protrusion of tongue But during wet ploughing the responses were not so marked in case of buffaloes and they did not show any apparent signs of distress The physiological responses decreased but did not reach the pre-exercise values after one hour of rest The haemoglobin per cent of blood packed cell volume and plasma bicarbonate content decreased significantly in cattle and buffaloes during dry and wet ploughing The erythrocyte sedimentation rate and blood lactic acid content showed a significant increase as a result of work One hour of rest was not sufficient to bring these parameters to pre exercise values Buffaloes consumed more DM when expressed in grams per kg metabolic body size Both species consumed more on days of no work The difference was more pronounced in case of buffaloes The water intake expressed as ml/kg metabolic body size was significantly higher for buffaloes both on days of work and on days of no work In both the species the water intake remained similar in days on which they were used for work and they were not used Kangayam bullocks ploughed significantly more area per unit time than graded Surti buffaloe bullock Cattle developed significantly more speed than buffaloes during dry ploughing But during wet ploughing the speed was almost same in both species Cattle showed more stride length during dry and wet ploughings than buffaloes But during wet ploughing the difference was negligible There was no significant difference in the traction power developed between cattle and buffaloes during dry or wet ploughings But both species developed higher horse power during wet ploughing Overall the results indicate that during summer in a hot humid tropical environment Kangayam bullocks can be used for dry as well as wet ploughings without any apparent ill effects Graded Surti buffaloe bullocks are on par with Kangayam bullocks under wet-ploughing However they seem to be under severe heat stress and also their work output inferior when used for a continuous 4 hour period of dry-land ploughing under similar climatic conditionsThesisItem Open Access Managemental effects of synchronization of oestrus in goats(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1993) Shivkumar, S; KAU; Thomas, C KAn experiment was conducted to study the managemental effects of synchronization of oestrus in goats using parentral administration of PGF2 alpha, on a flock of Malabari, Malabari x Saanen and Malabari x Alpine goats maintained at the Agricultural University Goat Farm, Mannuthy. Forty cyclic goats were selected in pairs on the basis of similarity in genetic group, body weight and age. The does from each pair were allotted to two groups at random. Out of these one group at random formed the treatment group and the other control. The goats in the treatment group were given two injections of 10 mg (I/M) each of PGF2 alpha separated by 11 days, in two batches of 10 goats each. The animals were mated at the synchronized oestrus following the second PG injection. The does in the control group were mated as and when they came to oestrus. Heat detection in the does was carried out by parading the vasectomised bucks twice daily and by observing the behavioural manifestations of oestrus. The results and conclusions of the study are given below. The PGF2 alpha treated goats showed 75 and 100 per cent oestrus synchrony after a mean interval of 45.93+2.19h and 48.38+2.06 h following the. first and second injection of PGF2 alpha respectively. Of the various signs of oestrus only rapid waving of tail in the presence of male and vaginal mucous discharge were observed in all the does in oestrus. Various signs of oestrus behaviour including receptivity was found to be more pronounced in oestrus synchronized does using PGF2 alpha than in the controls. Mated does showed pricking of ear and arching of back as post coital reactions. Conception rate following mating at the first oestrus was better in the treatment group (85%) than the controls (75%). Body weight changes during pregnancy was not found to be affected by synchronization of oestrus with prostaglandin F2alpha. Mean gestation period in the treatment group was ,148.14+0.80 days compared to 143.88+0.78 days in the controls, the difference being significant (P < 0.05). Overall 61.3 per cent of the parturitions were observed to occur between 0600 to 1800 hours. Maternal behaviour studies showed no significant difference between the does in the control (av. score 3) and treatment group (av. Score 2.8). Multiparas were observed to possess better maternal Instinct than the primipara does. The new born kids attempted to stand up within 8 to 15 minutes and 68 per cent of them suckled from the dam's teat within one hour of birth. In the control group 88 per cent of the kiddings were singles and 11.77 per cent twins compared to 85.71 per cent singles and 14.29 per cent twins in the treatment group. Comparing the growth of kids with respect to body weights and body measurements at fortnightly intervals from birth to 90 days of age, showed that the growth rate of kids born from synchronized oestrus was similar to that of control kids. Suckling behaviour in the kids revealed that the overall mean duration of suckling was 2.61 minutes and mean rate of suckling was 49.65 g per minute. It was observed that the rate of butting and intensity of tail wagging increased as the flow of milk from the teats got reduced. The mean daily milk yield from first to thirteenth week of lactation in the control and treatment g roups were found to be 0.509+0.015 kg and 0.493+0.014 kg respectively. Man nours requirements to look after the does and raising the kids born to tham to 90 days of age in both the control and treatment group, revealed that there was a man hour saving of 12.3 per cent in the oestrus synchronized group (treatment) than the untreated controls.ThesisItem Open Access Management information system on Bull Mother Herds(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1995) Devanand, C P; KAU; Thomas, C KThe study was based on information gathered from the Kerala Livestock Development Board farms at Dhoni and Madupetty. The existing systems of management and the records maintained with respect to the pedigree, growth, feeding, health, disease and treatment, production, reproduction, movement, shed workers routine, housing, shed management and weather were critically studied. The prevailing system of data collection and information management with respect to the parameters mentioned above were observed. Forming this as the background, an attempt was made to develop a flow chart for a computerized management information system for bull mother herds. Simultaneously, a PC based, menu driven, user – friendly package entitled ‘Management Information System – Bull Mother Herds’ (MIS – BMH) was evolved using Foxpro software giving sperial emphasis on the management requirements, information needs and the reports to be complied in bull mother farms. The MIS – BMH programme is structured under a main menu with various sub – menus. The main menu has four options namely data entry, reports, utilities and exit. The first option is used for the on line entry of events as it occurs in the farm. Data pertaining to the herd was grouped in three sections viz., calf, young stock and cow. Input formats were developed for data entry thus continuously updating the data base files storing details on birth, growth, feeding, health, disease and treatment, production, reproduction, movement, workers’ routine, shed management, housing and weather. The ‘Report Menu’ is accessed by selecting the second option in the main menu. The report menu has five options. Objectives and details of infrastructure is the first option in the report menu which provides brief details of the objectives and the composition of the farm. The user is presented with an analysis of the weather data recorded in the farm for a specified period on selecting the second option in the report menu. Some guidelines for the routine management of the stock with regard to calf care at birth, colostrum feeding, feeding of growing and milking animals, hygienic milk production, herd health control, sanitation and other management practices are displayed on choosing the third option in the report menu. ‘Animal Details’ is the fourth option in the Report menu. The sub – menu ‘Animal Report’ has five options namely calf details, young stock details, cow details, animal card and exit. The sub – menu ‘Calf Details’ has eleven options. Option 1 if chosen presents the user the birth details of all the calves born in the farm. The growth details of the calves are presented on choosing option 2. The report on the growth status of the calves in the farm for a specified period is accessed by selecting option 3. Feeding details is option 4. The sub – menu ‘Calf feeding/Consumption’ has three options namely calf feeding, calf consumption and exit. The quantity of milk to be fed to calves in the farm upto 90 days of age based on the feeding schedule entered is indicated to the user. The sub – menu on ‘Calf Health Details’ (option 5 sub – menu) has three options namely calf vaccination, diagnostic test and exit. The details of vaccinations and deworming performed and the diagnostic tests done on the calves in the farm are presented to the user. The disease and treatment report (Option 6 in the sub – menu) provides an account of all the diseases encountered by a calf with brief details of treatment and cost. The movement report is accessed by choosing the option 7 in the sub – menu ‘Calf Details’. It provides information on the number of calves dead, sold, transferred and culled during a specified period. The calf – shed workers routine report providing details about the daily work routine of calf – shed workers is accessed by choosing option 8 in the sub – menu. Details of calf housing are presented on choosing option 9 and calf shed management on selecting option 10. The informations relating to the young stock are accessed by choosing option 2 in the sub – menu on ‘Animal Reports’. The sub – menu ‘Young stock Details’ has eleven options and are organised more or less in the same fashion as in the case of calves with some additions such as options for reproduction. The details of young stock reproduction are accessed by choosing option 6. The sub – menu ‘Young Stock Reproduction’ has three options namely the heat details, AI/PD details and exit. The details of heat observed, inseminations done and pregnancy examination of each animal are furnished. The details of cows can be accessed by choosing option 3 in the sub – menu ‘Animal Report’. The sub menu ‘Cow Details’ displayed has eleven options. The output formats developed for and information furnished on cow growth (option 1), cow health (option 3), cow disease and treatment (option 4) movement (option 6), cowshed workers routine (option 7), cow housing (option 8) and cow herd management (option 9) are similar to that for calf and young stock. The feeding details of cows are accessed on selecting the option 2 in the sub – menu ‘Cow Details’. The sub – menu has four options namely feeding milch cows, feeding dry cows, feeding roughage and exit. The quantity of concentrates to be fed to a milking cow based on its milk production, stage of lactation and gestation is indicated to the user on choosing option 2. The details of feeding dry cows and the roughage feeding schedule are furnished on choosing option 2 and 3 respectively. The details of cow reproduction are presented on choosing option 5 in the sub – menu. The sub – menu ‘Cow Reproduction’ has five options namely heat details, AI/PD details, calving details, cow reproduction card and exit. The heat and AI/PD details furnished are similar to that for young stock. The calving report accessed on selecting option 3 furnishes details of all the calvings that have occurred in the farm for a specified period. The cow reproduction card is displayed on the screen by choosing option 4 in the sub – menu. This presents an overall picture of the reproductive performance of a cow in each lactation/cycle. The details of milk production are accessed by choosing option 10 in the sub – menu ‘Cow Details’. The sub – menu on milk production has seven options namely 100 days’ yield, lactation yield, persistency of milk, daily milk yield comparison, milk utilization day, milk utilization period and exit. The informations furnished are the lactation number, 100 days’ yield, peak yield, days on which peak was attained, lactation length, lactation yield, standard lactation yield, average fat per cent, fat yield in kilogram, 4 per cent fat corrected milk and standard fat corrected milk (corrected for lactation number and fat percentage) of each cow in the farm. Further, details of the persistency of production and a chart showing the daily milk yield of cows corrected for lactation number are presented on choosing option 3 and 4 respectively. Details of the utilization and sales of milk on a day and for a period are also furnished (option 5 and 6). ‘Animal Card’ is option 4 in the sub – menu on animal report. This provides uptodate, quick and accurate information on the status of each animal with respect to pedigree, growth, production, reproduction and disposal. The third option ‘Utilities’ in the main menu provides facilities for modification, deletion, back up, restore and help to the user. The fourth option is exit. The software evolved was tested using data collected from the KLD Board bull mother farm at Dhoni. The informations generated were to be accurate, reliable and consistent with the managemental requirements of a bull mother farm thus making it suitable for use in bull mother farms in India and elsewhere. Though it updates similar packages available in the country, possibilities of further refinement and sophistication still exists. Depending on future processing and analytical requirements, the system can be further developed and expanded by adding on additional program modules or by altering and modifying existing ones.ThesisItem Open Access Effects of weight at weaning and plane of feeding on the onset of puberty in gilts(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1993) Lalnuntluangi, Hmar; KAU; Rajagopalan, T GThirty six Large White Yorkshire weanling females of 8 kg (light weaners) and 12 kg (heavy weaners) were randomly maintained on three different planes of feeding with respect to crude protein (CP) and digestible energy (DE) viz. (i) NRC recommended levels as control, (ii) a high plane (HP) of 10 per cent increase of CP and DE with respect to NRC level and (iii) a low plane (LP) of 10 per cent decrease of CP and DE with respect to Nrc from weaning to puberty. The fortnightly and daily weight gain was higher in pigs fed NRC diet. The heavy weaners were having a better growth rate, daily gain, higher feed intake and attained puberty earlier than the light weaners, but the feed conversion efficiency was lower than light weaners. The heavy weaners on high plane attained puberty earlier than animals on NRC or low plane diet. In light weaners, NRC group attained puberty earlier than HP and LP group. In both heavy and light weaners, LP group attained puberty later than the other treatment groups. Plane of feeding has no significant effect on puberty attainment, oestrous cycle length and duration of pubertal cestrus but weight at weaning has a significant effect on the onset of puberty. Oestrous hehaviour expressed as scores was significantly affected by plane of feeding. The animals on high plane diet consumed less feed in both heavy and light weaners and have the highest feed conversion efficiency. The light weaners consumed feed comparatively lower and have better feed conversion efficiency than heavy weaners. The overall result suggested that heavy weaners on high plane diet are most efficient in feed conversion efficiency, economy and attainment of puberty at younger age. On the whole, the heavy weaners are more economical for replacement stock than light weaners.ThesisItem Open Access Feeding techniques to enhance the growth in calves(Department of Livestock Production and Management, College of Veterinary and Animal Sciences, Mannuthy, 1999) Reny, K Oommen; KAU; Thomas, C KWith the objective of investigating the feasibility of the technique of liquid feeding of concentrates to calves through nipple buckets with and with out incorporation of blood meal in the ration, 24 calves below one month of age at Cattle Breeding Farm Thumburmuzhy, Kerala Agricultural university were randomly allotted to four treatment groups. The four treatment groups were Tl - dry feeding and no supplementation of blood meal. Tz - dry feeding and supplementation with blood meal T3 - liquid feeding and no supplementation with blood meal. T. - liquid feeding .and supplementation with blood meal. The dry feeding groups were offered feed in feeding baskets and the same feed suspended in water was fed to liquid feeding groups through feeding nipples fixed on aluminium buckets. The experiment was conducted during the months of April to September, 1997 where the temperature Humidity Index values were above 75 per cent indicating a stressful environment due to the combined effect of high temperature and high humidity which adversely affected the growth of calves in all four treatment groups. Intakes of water, concentrate and roughage were not significantly different between treatment groups but liquid feeding group showed a slightly higher trend on water intake. There was no significant difference between treatment groups in terms of live weight gain, body length, height and chest girth. But the general trend varied for live weight and chest girth. Body weights were lower in T) and T4 groups where liquid feeding was resorted to. The dry feeding group had better chest girth than liquid feeding group which reflected in their live weight gain also. Monthly values of haematocrit, haemoglobin, erythrocyte sedimentation rate, serum glucose, serum cholesterol and plasma protein were not significantly different between treatment groups. But treatment groups receiving blood meal showed slightly higher haemoglobin per cent. The plasma protein values were slightly higher in groups receiving ration in dry form which had a higher daily weight gain. Treatment groups on liquid diet had more episodes of diarrhea than those on dry diet. Treatment groups showed no significant difference with regard to carcass characteristics but the trend indicated higher meat yield from groups receiving dry feed. Only during the last two months, i.e., in the fifth and sixth months when the rumen is somewhat fully developed, some beneficial effect of liquid mode of feeding was evident. Liquid feeding through nipple is known to bypass rumen and in animals with ill developed ~umen, liquid feeding should show beneficial effects on growth. In the present 'study such a difference could not be observed possibly due to the fact that all the rations contained fish meal which has high content of protein escaping rumen degradation. The level of 30 per cent replacement of protein by blood meal showed no retardation in feed intake or growth in the experimental animals.ThesisItem Open Access Heat stress alleviating measures for crossbred cows(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 1999) Thirumurugan, P; KAU; Saseendran, P CAn experiment was conducted to find the effect of sprinkling water on crossbred cows during summer season oKerala. Twelve early lactating crossbred cows were selected and put into four groups of three each and were randomly allotted to four treatments as open house with sprinkler (T1), open house without sprinkler (T2), tie-barn with sprinkler (T3) and tie-barn without sprinkler (T4). The mean maximum temperature recorded in the T1, T2, T3 and T4 locations were 32.03, 32.17, 33.27 and 33.40oC respectively and these were lower than the maximum temperature recorded outside the animal houses (35.45oC). Both within the tie-barn and within the open house, the mean maximum and minimum temperatures and mean relative humidity morning and afternoon did not differ significantly due to sprinkling of water.But the differences between the tie-barn and open house were highly significant (P<0.01) and higher in the tie-barn for all these variables. Physiological reaction such as rectal temperature, respiratory rate and cardiac rate did not vary significantly between treatments for morning recording. For afternoon recording the differences were highly significant. Sprinkling of water in T1 and T3 markedly reduced the diurnal rise in physiological norms compared to T4. The difference between T2 and T3 was comparable. Mean weekly milk yield of cows in T1, T2 and T3 increased by 4.70, 1.22 and 1.71 kg per head respectively compared with T4. Milk composition such as total solids, solids not fat, protein and fat percentages did not vary significantly between treatments. Green grass consumption differed significantly between treatments and highest in the T1 (26.16 kg per cow). Daily water consumption differed significantly between treatments and highest in the T4 (31.72 kg). Haemoglobin, packed cell volume and erythrocyte sedimentation rate differed significantly (P<0. 01) between treatments. There was a uniform loss in body weights of all the experimental cows as lactation progressed upto the peak yield stage, thereafter the cows had shown tendency to regain body weights irrespective of the type of treatment given. Sprinkling water in T1 and T3 encouraged the feeding and rumination of cows during hot hours of the day and consumed significantly more feed. Sprinkling of water in T1 and T3 increased the intensity and duration of oestrus 'and successful insemination rate. The results suggest that during the summer season of Kerala tree shade or simple shade areas with roof supported on pillors affording maximum ventilation and sprinkling or splashing of water during hot hours of the day may be practiced to alleviate heat stress and reduce drop in milk production and fertility rate during summer.
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