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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Open Access
Growth and carcass characteristics of pigs maintained on rations containing different levels of dried tapioca chips
(Department of Animal Nutrition, College of Veterinary and Animal Sciences,Mannuthy, 1981) Sasikala Devi, K A; KAU; Thomas, C T
An investigation was carried out to assess the growth rate, feed efficiency, carcass quality and economics of production in swine with isoproteimic rations containing dried tapioca chips in partial or complete replacement of maize. Eighteen large White Yorkshire weanling pigs were divided into three groups (Group 1, 11 and 111) of six animals each as uniformly as possible in regard to litter, sex, age and weight and maintained on three isoproteimic diets A, B and C containing 0, 20 and 40 per cent levels respectively of dried tapioca chips in partial and complete replacement of maize. Records of feed intake, fortnightly body weights and body measurements were maintained throughout the course of the experiment. Digestibility coefficients of nutrients in the rations were determined. Two males and two females each from all the three groups were slaughtered when they attained the body weight of 70 kg for collecting data on carcass characteristics. Haematological studies were also carried out to assess the nutritional status of the animals. The animals under all the three dietary treatments recorded almost similar growth rates, the overall average daily gains being 385.9, 368.0 and 380.2 g respectively for the three groups 1, 11 and 111. The total food intake of the animals were similar indicating that the three rations, in addition to being isoproteimic, were also isocaloric and of almost equal palatability. The animals also showed similar feed conversion efficiency, the overall average values being 3.59, 3.62 and 3.57 respectively for the groups 1, 11 and 111. The digestibility coefficients of nutrients in the three rations were similar indicating that dried tapioca chips was as efficiently utilised as maize. The normal and similar values for blood constituents indicated that all the animals maintained normal nutritional status and inclusion of tapioca at levels as used in the present study did not exert any deleterious effect on the health of the animals. Results of studies on carcass characteristics revealed that the dressing percentage without head, carcass length, back fat thickness, loin – eye area and percentages of prime cuts against live weight were all found to be similar with both tapioca and maize based diets. The diets used did not seem to markedly influence the melting point of body fat though there was significant difference between subcutaneous and leaf fat indicating a greater unsaturation of subcutaneous fat. Saponification values were found to be similar with all the three diets. With respect to both subcutaneous and leaf fat, iodine number was higher on maize based diets though there was significant difference only in regard to subcutaneous fat. Cost of production per kg live weight of the animals in the three groups 1, 11 and 111 were shown to be Rs.8.20, 8.19 and 7.99 respectively. An overall evaluation of results clearly indicated that dried tapioca chips can be safely and profitably incorporated in swine rations at a level of 40 per cent in place of conventional cereal grains like maize.
Open Access
Optimum level of protein in concentrate mixtures of kids for growth
(Department of Animal Nutrition, College of Veterinary and Animal Sciences,Mannuthy, 1981) Ganga Devi, P; KAU; Kunjikutty, N
An investigation spread over a period of 4 ½ months was carried out to establish the optimum level of protein in concentrate mixtures of kids for growth. Twenty four cross – bred kids (Saanen x Malabari and Alpine x Malabari) of 3 – 4 months of age, divided into four identical groups formed the experimental subjects. The kids in group 1, 11, 111 and IV was maintained on concentrate mixtures containing 16, 18, 20 and 22 per cent respectively of crude protein along with jack leaves fed ad libitum as the sole roughage. Increase in body weight and body measurements, feed conversion efficiency, digestibility of nutrients, nitrogen retention and haematological values of the kids were the criteria employed for the evaluation. The average daily gain in body weight recorded for the kids of the four groups were almost similar and were not influenced by the level of dietary protein fed. The body measurements did not reveal any significant differences between the groups except body length which showed increase with increase in level of dietary protein. Highest feed efficiency was shown by kids of group IV followed by group 111, 11 and 1 the values being 6.2, 6.9, 7.0 and 7.2 respectively for the four groups. The digestibility of nutrients especially that of crude protein and the average daily nitrogen retention were directly proportional to the level of dietary protein fed. All the animals maintained a sound nutritional status throughout the experimental period as evidenced from the normal haematological values recorded for them. Kids fed 22 per cent crude protein in the concentrate mixture showed maximum economic gain.
Open Access
Studies on the nutrient requirements of kids
(Department of Animal Nutrition, College of Veterinary and Animal Sciences, Mannuthy, 1979) Mercy, A D; KAU; Sivaraman, E
An investigation was carried out to find out the nutrient requirements for optimum growth in kids. Twenty four Alpine – Malabari crossbred kids of 3 4 months of age formed the experimental subjects for the study. The animals, divided into three identical groups (groups 1, 11 and 111), were maintained on three different levels of nutrient intake for over a total period of 4 ½ months, the parameters recorded during the course of the study being average daily body weight gain, drymatter intake, feed conversion efficiency, digestibility coefficients of nutrients, nitrogen balance, mineral balance and haematological constituents. The average daily gain and feed conversion efficiency recorded for animals in the three groups 1, 11 and 111 were found to be 63.7 + 5.3, 64.4 + 5.0 and 67.6 + 2.0 g and 7.0 + 0.7, 7.5 + 0.5 and 7.9 + 0.3 respectively. The average drymatter consumption of animals were 3.1 + 0.2, 3.5 + 0.3 and 3.6 + 0.3 kg per 100 kg body weight respectively for the three groups 1, 11 and 111. The data collected for the haematological constituents were found to lies within the normal range for the species indicating that all the animals under the three dietary regimes were maintaining normal and sound nutritional status. The requirements arrived at for protein and energy for unit gain in body weight were 0.86 + 0.06 0.90 + 0.06 and 0.89 + 0.03 kg D. C. P. and 4.84 + 0.4, 5.20 + 0.30 and 5.31 + 0.19 kg T. D. N. for the animals in groups 1, 11 and 111 respectively. The requirements of D. C. P., T.D. N., calcium and Phosphorus arrived at from the results obtained during the course of the experiment are considered optimum for normal growth in Alpine – Malabari crossbred kids.
Open Access
Studies on the nutritional requirements of the Indian elephant
(Department of Nutrition, College of Veterinary and Animal Sciences, Mannuthy, 1979) Ananthasubramaniam, C R; KAU; Chandra, Menon K
Stimulated by the results of a digestion trial conducted previously in growing and adolescent elephants, an investigation involving, nitrogen, calcium, phosphorus and energy balance studies was carried out in two young and two adult elephants fed palm leaf ad lib. at first (Trial 1) and subsequently at 75 per cent of the ad lib. in take (Trial 11) with a view to evolve feeding standards for the elephant for maintenance and growth. Prior to this investigation, the reliability of applying a formula based on body measurements to predict body weights of the elephants as accurately as possible for purposes of their scientific feeding and judicious treatment was examined in 20 animals of varying age, sex and weight. The nutritional status of the elephants under balance trials was assessed in terms of concentrations of some of the well – known blood constituents. From the overall results obtained, the salient inferences drawn were the following : 1. For predicting the body weights of the elephants, formulae devised on the basis of chest girth and neck girth measurements are found to be more accurate than those involving body length, height and chest girth. 2. Adult animals, whether fed palm leaf ad lib. or at restricted level, consume more feed and more dry matter and void more dung dry matter and total urinary solids, as compared with the young elephants under identical conditions. 3. Adult animals digest dry matter, crude protein and nitrogen – free – extract better than the young at both levels of intake, the differences between them in the digestibility of dry matter on restricted level of intake being significant (P < 0.05). Restriction of feed intake significantly reduces the digestibility of nitrogen – free – extract (P < 0.05) in young animals. 4. Adult animals consume daily more DCP and TDN as compared with the young animals at both levels of intake. Restricted feeding reduces the DCP and TDN intakes of both the adult and young animals, the TDN intakes per metabolic body size of both groups being significantly less than the same observed during ad lib. feeding (P , 0.01). The adult animals consume significantly more TDN as compared with the young on restricted feeding (P < 0.05). 5. The overall differences in nitrogen balance between the two groups and between the two trials are significant (P < 0.05). Adult animals register higher values for positive nitrogen balance as compared with the young on both levels of feeding. Restricted feeding reduces the nitrogen balances in both the groups. 6. Adult animals show significantly higher calcium balance as compared with the young on restricted level of feeding (P < 0.05). Between the two levels of intake, significant difference is observed in the case of the young (P < 0.05), the animals showing batter calcium balance on ad lib. feeding. 7. All animals, irrespective of group or level of intake, show negative balance for phosphorus. 8. Adult animals consume and digest gross energy better than the young in both the trials, the increase in the availability of digested energy per metabolic body size in the case of the adult animals in each trial being significant (P < 0.05). Restriction of feed intake significantly reduces the digested energy values in the case of both the groups (P < 0.01). 9. Dry matter, DCP, TDN, DE and ME requirements for the maintenance of the adult elephant are : 108g, 6g, 58g, 278 kcal and 237 kcal respectively per unit metabolic body size (kg.73) per day. 10. Dry matter, DCP, TDN, DE and ME requirements for the growth of the young elephant are : 142g, 7g, 335 kcal and 279 kcal respectively per unit metabolic body size (kg.73) per day. 11. The requirements of calcium for the maintenance and growth of the elephant are: 0.5g and 0.6g respectively per unit metabolic body size (kg.73) per day. 12. Palm leaf even when fed ad lib. does not supply enough phosphorus either maintenance or for growth. 13. Palm leaf even when fed at a restricted level provides adequate cobalt for Vitamin B12 synthesis and for other physiological purposes. 14. Feeding standards for the maintenance and growth of the elephant are formulated in terms of Dry matter, DCP, TDN, DE and ME values. 15. The concentrations of Vitamin B12 in blood plasma of the adult and young elephants are found to be on an average 18.05 and 16.94/ug/100 ml respectively. 16. Adult and young elephants fed palm leaf maintain sound nutritional status, adjudged from haematological values. The significance of the above inferences is discussed briefly. Summary of summary 1. Two formulae based on neck girth and chest girth measurements have been devised to predict the body weights of the elephants to 97 per cent accuracy. 2. It has been shown that whenever palm leaf forms the sole source of feed for the elephant, there is a need for a phosphorus supplement. 3. Feeding standards in terms of Dry matter, DCP, TDN, DE and ME for the maintenance and growth of the elephant have been evolved and recommended in the form of formulae. 4. The level of Vitamin B12 in the blood of the elephant has been reported for the first time.
Open Access
Evaluation of feeding value of rubber seed cake for promoting growth in calves
(Department of Nutrition, College of Veterinary and Animal Sciences, Mannuthy, 1977) Viswanathan, T V; KAU; Ananthasubramaniam, C R
A detailed investigation was carried out to assess the value of rubber seed cake as an ingredient in the concentrate mixture of calves to study the growth rate, nutriture, feed efficiency and economics of rearing. Twenty four, Jersey x Sindhi cross – bred calves of 8 – 14 months of age belonging to the University Livestock Farm, Mannuthy were divided into three equal groups and distributed under three dietary treatments, T1, T2 and T3, the animals being fed concentrate mixtures containing 0, 15 and 30 per cent levels of rubber seed cake respectively for a period of six months. Paddy straw served as the sole roughage. Rubber seed cake at 30 per cent level promoted better weight gains, body size and feed efficiency. Incorporation of rubber seed cake in the concentrate mixture improved the digestibility coefficients of nutrients as also the balance of nitrogen, calcium and phosphorus in the animals. Animals fed rubber seed cake maintained perfect health as evidenced from their haematological values and were free from any toxic effect as adjudged from the histopathological examination of the internal organs and their carcass quality. The cost of feed was found to be 14 per cent lower for kg body weight gain when rubber seed cake was incorporated at 30 per cent level in the concentrate mixture of growing calves. The overall results obtained during the course of the present investigation indicate that rubber seed cake can be incorporated in the concentrate mixture for growing calves at 30 per cent level to achieve both biological and economic efficiency.
Open Access
Lucerne meal as an ingredient in calf starter
(Department of Animal Nutrition, College of Veterinary and Animal Sciences, Mannuthy, 1981) Geetha, A; KAU; Sivaraman, E
An investigation was carried out to assess the feeding value of lucerne meal as a possible substitute for fish meal in calf starters. Eighteen cross bred calves, weaned at birth, were divided into three groups (Groups 1, 11 and 111) of six animals each as uniformly as possible in regard to body weight and maintained on three isoproteimic calf starter diets, A, B and C containing 0, 15 and 20 per cent levels respectively of lucerne meal in partial or complete replacement of fish meal. Records of fortnightly body weights and body measurements were maintained throughout the course of the experiment. Haematological studies were carried out at monthly intervals. Digestibility coefficients of nutrients in the three rations were determined by conducting a digestion trial towards the end of the experiment. Though the control diet appeared better in promoting growth in calves, the overall daily gains and feed efficiency were almost similar with all the three dietary treatments clearly indicating that lucerne meal can replace fish meal at the levels used and fairely meet the amino acid requirements of the calves. Gains in body weight showing a positive correlation between body weight and body measurements. The normal and similar values for blood constituents indicated that all the animals maintained normal nutritional status and inclusion of lucerne meal at levels as used in the present study did not exert any deleterious effect on the health of the animals. An overall critical assessment of results clearly indicated that with isoproteimic diets licerne meal can be safely included in calf starters at levels of 15 and 20 per cent in partial or complete replacement of fish meal.
Open Access
Studies on the degradability of proteins and protected proteins in the rumen of cattle
(Department of Animal Nutrition, College of Veterinary and Animal Sciences, Mannuthy, 1985) Sampath, K T; KAU; Sivaraman, E
An investigation was carried out to determine the ruminal protein degradability of groundnut cake, gingelly cake, rubber seed cake, coconut cake yellow maize, wheat bran and guinea grass and to determine the correlation between their degradability in rumen and solubility in mineral solvents and autoclaved rumen fluid. The effect of heat treatment and the formaldehyde treatment on the protein degradability of groundnut cake, gingelly cake and rubber seed cake was also studied. The effect of different levels of degradable proteins in the ration on the rumen fermentation pattern in cows and on growth rate and digestibility of nutrients in calves were also studied. The degradability of proteins of the feed stuffs in the rumen were estimated employing the nylon bag technique using five fistulated cows. The effective protein degradability was determined using the formula P = a + bc where k is the c+k fractional outflow rate from the rumen and a, b and c are the constants of the exponential equation p = a + b (1 – e–ct). The effective protein degradability values of groundnut cake, gingelly cake, rubber seed cake, coconut cake, yellow maize, wheat bran and guinea grass at a rumen outflow rate of 0.05/h were 66.76, 85.12, 68.12, 68.61, 19.09, 22.83, 77.02 and 41.50 per cent respectively. Among the oil cakes coconut cake was least degradable in the rumen and was found to be a good source of bypass protein for ruminants. Heat treatment (1500C for 2 hours) reduced the protein degradability of groundnut cake, gingelly cake and rubber seed cake by 83.18, 76.80 and 70.10 per cent respectively at an outflow rate of 0.05/h and the formaldehyde treatment (1 g/100g CP) reduced the protein degradability of these cakes by 55.98, 45.45 and 44.33 per cent respectively at the same outflow rate. Significant correlations were observed between protein degradability of feed stuffs in the rumen and their solubility in 0.15 M sodium chloride (r = 0.79), McDoughal’s artificial saliva (r = 0.74) and autoclaved rumen fluid (r = 0.81). No correlation could be observed between the protein degradability in the rumen and the solubility in Burroughs mineral solution. A significantly high correlation (r = 0.91) was also observed between protein degradability in the rumen and the percentage of protein loss from control bags due to washing. Rumen pH and ammonia nitrogen concentration were significantly higher in the animals receiving rations with higher levels (76.90%) of degradable proteins. The total volatile fatty acid concentration was significantly high in the animals receiving rations with lower levels (45.30%) of degradable protein. The effect of three levels (44.50, 60.50 and 71.30 per cent) of degradable proteins in the ration on growth and digestibility of nutrients was studied using 18 growing calves divided into three groups. The final body weight and the daily weight gain of the calves receiving the lower levels (44.50%) of degradable protein in the ration were significantly high as compared with those obtained in the case of calves receiving higher levels (60.50 and 71.30%) of degradable protein. The drymatter intake and the digestibility of nutrients of the rations were not influenced by the level of degradable proteins in the ration. The optimum level of degradable protein sufficient to support growth was found to be 45 per cent.

Kerala Agricultural University, Thrissur

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