Loading...
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.
Browse
92 results
Search Results
ThesisItem Open Access Evaluation of wood quality of selected tropical pines raised in the high ranges of Kerala, for pulp and paper making(Department of Tree Physiology and Breeding,College of forestry,Vellanikkara, 2010) Ajayghosh, V; KAU; Anoop, E VA study entitled “Evaluation of wood quality of selected tropical pines raised in the high ranges of Kerala, for pulp and paper making” was conducted in the College of Forestry, Kerala Agricultural University, Vellanikkara, Thrissur during the period 2008-2010. The objective of the study was to evaluate the wood quality of Pinus caribaea Morelet, Pinus patula Schl. et Cham. and Pinus oocarpa Schiede grown in research trials of the Kerala forest department in the high ranges of Idukki district of Kerala. Increment core wood samples were collected at breast height from trees, selected at random, from each plot representing each species belonging to different age levels. These samples were then subjected to intensive investigations to find out radial variation (pith, middle and periphery), species variation and influence of age on different wood physical, anatomical and chemical properties. The study revealed that many of the characters studied were influenced by species and age interaction. Radial variation was also found to have significant difference within the species for characters studied. As a whole, under the present climatic condition P.caribaea was found to perform better with wood properties within the accepted range suitable for pulping and paper making. On the other hand, P. patula and P. oocarpa were also found to be promising species for pulping and papermaking with better derived fiber ratios. However, P. oocarpa had specific gravity value slightly more than that is recommended for pulp and paper making. Studies on chemical composition revealed that P. ooccarpa had better performance with higher cellulose and lower lignin content. So what needs to be determined is the relationship, if any, between wood and tracheid properties of these species and the products which can be manufactured from this renewable resource. For this, more extensive study is needed for which the results of this study could be used as a base line data for future tree improvement aspects of these species with reference to wood quality and to bring out their potential utility for future afforestation programmes and timber utility.ThesisItem Open Access Forecasting volatility of the indian stock market(Department of Rural Banking and Finance Management, College of Co-operation, Banking and Management, Vellanikkara, 2009) Khadilkar Guruprasad, Hari; KAU; Molly, JosephThe present study on ‘forecasting volatility of the Indian stock market’ was conducted with the main objectives of examining the volatility behaviour of the Indian stock market, to forecast the sector- wise volatility of the Indian stock market and to identify the most efficient volatility forecasting model among the different models used. For the study the biggest stock market in India in terms of total turnover and volume of transactions, ie, National Stock Exchange was selected. For analyzing the volatility behaviour of the Indian stock market as a whole, S&P CNX Nifty index was taken. Five companies representing five different sectors were selected for forecasting sector – wise volatility. The study used secondary data on daily close prices of individual stocks from November 1994 to October 2008, and for Nifty, daily close values, from November 1995 to October 2008 from the website of National Stock Exchange, www.nseindia.com. The study revealed presence of strong volatility in the Indian stock market. The histogram drawn for the volatility of all samples showed that the distribution of volatility was not normal. There was positive skewness and all the distribution of volatility was leptokurtic. This proved the presence of high peak values (squared returns) in the sample data, exposing the evidence of volatility clustering and the possibility for prediction of future volatility. While analysing sector -wise volatility, the diversified sector represented by Reliance Industries Limited showed the highest volatility compared to that of Nifty and the other sectors. In other words, Reliance is the most volatile stock among the samples selected for the study. Reliance and Infosys had good predictability of volatility in the stock market. The best identified model for forecasting the volatility of stock markets is the EWMA. Then comes AR (1) followed by MA (3), RWM and HMM. Random walk model was found suitable for the prediction of volatility of two sectors - IT (Infosys) and engineering heavy (BHEL) only. But the MAPE values of these were high. Historic mean model could not predict the volatility in the stock market with precision, for the index as well as for any of the five companies. Out of three, six, nine and twelve monthly moving averages taken for predicting the volatility three months moving average was found most suitable for all the samples. Prediction of volatility using the most efficient model of EWMA identified indicated decreasing trend of volatility for the next six months, except for Infosys. The confidence limits for the Nifty and the stocks of five companies based on volatility for the sample period found that for Infosys the distribution of volatilities for the out of sample period are coming within the prefixed UCL and LCL and it ensures that the volatility is under control and predictable with high degree of precision. The ever increasing market segments, advancement of technology, widening market reach and multi dimensions of stock market provide ample scope for further research in this area to the advantage of the investors and other market participants.ThesisItem Open Access Effect of seed treatments and shade on seedling growth dynamics of pongamia pinnata (Linn.) pierre in the nursery(Department of Forest Management and Utilisation, College of Forestry, Vellanikkara, 2009) Gururaj Sankeshwar, B; KAU; Gopakumar, SThe present study entitled “Effect of seed treatments and shade on seedling growth dynamics of Pongamia pinnata (Linn.) Pierre in the nursery” was carried out in College of Forestry, Kerala Agricultural University, Vellanikkara, Thrissur during the period of 2007-2009. In the first phase, seeds were subjected to six pre-sowing treatments. GA3 treated seeds recorded highest Germination percentage, Final Mean Daily Germination (FMDG), Germination Value (GV) and Peak Value (PV). The effect of seed treatments were observed on various biometric parameters like height, collar diameter, number of leaves and primary branch. GA3 treated seeds recorded better height and collar diameter during the initial stage of seedling growth. At the end of study cold water seed treatment was found to be effective in enhancing seedling growth. However, none of the pretreatments was observed to cast a significant effect on biomass production and root growth parameters in Pongamia pinnata seedlings. In the second phase, to evaluate seedling growth under different shade conditions, seedlings were placed under 25 per cent shade, 50 per cent shade, 75 per cent shade and full sunlight situations. Shade treatments did not significantly influence height and collar diameter growth of Pongamia pinnata seedlings in the nursery. The maximum leaf production and primary branch production was observed in seedlings kept under full sunlight and 50 per cent shade respectively. Under seventy five per cent shade seedlings produce maximum shoot and root dry weight. The shoot: root ratio and total biomass was also maximum for seedlings kept under 75 per cent shade. Root length and spread were maximum under 50 per cent shade. However, shade did not significantly effect secondary root production. Shade levels also did not influence Pongamia pinnata seedlings with respect to relative growth rate and leaf area. However, Specific leaf area and Leaf area ratio was higher under 25 per cent shade. Highest Specific leaf weight was observed for seedlings under full sunlight. Shade had no significant effect on leaf weight ratio of seedlings. Maximum stomatal number was recorded under 25 per cent shade. In the nursery stage shade is casting an overriding influence with regards to various growth parameters of Pongamia pinnata.ThesisItem Open Access Hepatoprotective effect of azadirachta indica (NEEM) and tridax procumbens (CHIRAVANAK) in rats(Department of Veterinary Pharmacology and Toxicology,College of veterinary and animal sciences,Mannuthy, 2010) Ranjana Mooken, KAU; Aravindakshan, C MThe objectives of the present study were to evaluate the hepatoprotective activity of ethanolic extract of Azadirachta indica and Tridax procumbens leaves in paracetamol induced hepatic damage in rats and to compare their action. Forty adult male wistar rats weighing 150-200 g, divided into five groups comprising eight animals in each group, were used for the study. Groups I and II animals were administered with 3 per cent gum acacia suspension in distilled water at the dose rate of 5 ml/kg/day for ten days. Groups III and IV animals received ethanolic extract of Azadirachta indica and Tridax procumbens leaves at the dose of 300 mg/kg and Group V animals received reference drug silymarin at the dose of 100 mg/kg/day in 3 per cent gum acacia for ten days. All the groups except the group I, received paracetamol orally on the eighth day at the dose rate of 2 g/kg in distilled water. Blood was collected from all the groups before and after the experiment for various biochemical and haematological parameters. Body weight was recorded on day 0 and 10th day. All the animals were sacrificed on 10th day and liver was taken for histopathological examination. Phytochemical analysis of the Azadirachta indica (Neem) leaf extract revealed the presence of alkaloids, tannins, flavonoids, glycosides, phenolic compounds, diterpenes, triterpenes and saponins and that of Tridax procumbens (chiravanak) showed the presence of alkaloids, steroids, glycosides, flavonoids, saponins and tannins. Paracetamol administered group showed a decrease in body weight. Liver marker enzymes like ALT and AST were highest in paracetamol treated groups. The elevated levels of these enzymes were decreased by the herbal extracts thereby proving their hepatoprotective activity. A reduction in the total protein was observed in the paracetamol treated group. Both the herbal extracts elevated the total protein level to normal levels. Serum albumin level was also lowest in the paracetamol treated group because of the decrease in the total protein level. Both the extracts increased the serum albumin levels towards normal values. Serum bilirubin level was also highest in the paracetamol treated group Azadirachta indica and Tridax procumbens leaf extract at the dose rate of 300 mg/kg decreased the elevated level of bilirubin. The haematological parameters showed not much significant change with the treatment. From the biochemical studies it was noted that the administration of Azadirachta indica (Neem) leaf extract caused better reduction in serum parameters than that of Tridax procumbens extract. Gross examination of the liver showed normal appearance in all the four groups except the paracetamol treated group in which the liver showed areas of coagulative necrosis and congestion. On histopathological examination the paracetamol treated group showed extensive areas of centrilobular coagulative necrosis. The Azadirachta indica treated animals showed diffuse necrotic areas and fatty changes in certain lobules. The areas of regeneration with binucleate hepatocytes were abundant in this group. The Tridax procumbens treated group showed hypertrophied hepatocytes with vacuolation of cytoplasm and presence of fat droplets. The areas of regeneration with binucleate hepatocytes were scanty in this group. Silymarin treated animals have almost normal liver architecture like the control group. From the present study it can be concluded that the ethanolic extracts of leaves of A.indica and T.procumbens have significant hepatoprotective activities in paracetamol induced hepatotoxicity in rats and A.indica has a better hepatoprotective action compared to T.procumbens.ThesisItem Open Access Reliability of united score card for crossbred dairy cows of Kerala(Department of Livestock Production Management, College of Veterinary and Animal Sciences, Mannuthy, 2010) Dhanya, K; KAU; Anil, K SThe research work was conducted to assess the reliability of Unified score card for cross bred cows of Kerala. One hundred and ninety six animals of University cattle farms of Mannuthy, Thumbunnuzhi and Thiruvazhamkunnu were selected for the study. As per the Unified score card by Purebred Dairy Cattle Association, the animals were judged for frame, dairy character, body capacity, feet• and legs and udder. The type components were again subdivided as described in the scorecard to improve the accuracy of judging score. The body measurements of individual animals like height at withers, body length, chest girth, height at withers, height at pins, length of quarter, width between angles of hook and slope of rump were taken. The animals were categorized into four age groups, four parities and three stages of lactation. The emphasis of each of the components of unified score card to milk production was compared and statistical analysis was carried out as per methods suggested by Snedcor and Cochran (1994). Effects of age, stage of lactation and parity on judging using Unified Score Card were worked out. The body measurements were also correlated with the score and milk yield. Age, parity and stage of lactation were found to be nonsignificant for final score. The scores of frame, dairy character and udder for different age groups showed no significant difference, whereas, scores of body capacity and feet and legs differed significantly. The scores of dairy character and body capacity differed significantly with parity. No significant difference was shown for scores of frame, feet and legs and udder. Frame was found to be positively correlated with other components, the least being with udder (r=0.127) and highest with feet and legs (r =0.254) which was highly significant (p<0.01). Dairy character was significantly correlated with body capacity (r=0.169) and feet and legs(r=0.2S4) in addition to frame. Feet and legs was the only component to which udder showed positive significant correlation (pAge was found to be not significant for lactation yield (P~O.OS). The means of lactation yield differed significantly for different parities. All the type components were found to be positively correlated with lactation yield, all being significant. The standardized partial regression coefficients were highly significant for dairy character, udder. and body capacity whereas non significant regression coefficients were obtained for frame and feet and legs. Udder depth was having the highest regression coefficient (~=0.312) which was highly significant (p<0.01). Regression coefficients were significant and positive for skin (0.229), withers (0.188), ribs (0.174) and thighs (0.162). Both age and parity had significant positive correlation on body weight. Body weight was significantly (p<0.0 1) correlated with lactation yield with r=0.244. Height at withers, length, hip width girth and height at hook showed significant difference with age (p:SO.OS).The height at pins and slope were found to be not affected significantly by age. All the measurements except slope were significant and positive in correlation with body capacity. All height measurements, length and girth was found to be positively correlated with frame (p<0.0 1). Final score was having significant positive correlation with all height measurements (p:SO.OS). It was concluded that although the score card was found to be reliable on the production of crossbred cows of Kerala, the emphasis placed on type components was not in full agreement with what was prescribed by the purebred Dairy Cattle Association Dairy Cow Unified Score Card. Hence it was suggested that more weightage could be given to body capacity and dairy character compromising weightage on frame and feet & legs which necessitated further studies in this regard.ThesisItem Open Access Recovery of solids from surimi wash water and preparation of a fish feed with the recovered solids(Department of Processing Technology,College of Fisheries, Panangad, 2010) Jibina, M.M; KAU; Krishnakumar, SA study was conducted aimed at testing the efficiency of pH reduction and heat coagulation in the recovery of solids from surimi wash water (SWW) generated during water leaching of the meat of tilapia (Oreochromis mossambicus) and to reduce the nutrient load in SWW. The study also included the preparation of a fish feed with the recovered solids. Temperature for heat coagulation was optimized among four different temperatures viz., 65oC, 70oC, 75oC and 80oC. Optimum temperature that provided maximum recovery was 75 oC. Isoelectric precipitation was optimized using four different pH levels viz., 4.0, 4.5, 5.0, and 5.5. Optimum pH which yielded maximum recovery was pH 5.0. By heat coagulation 1.97% solids with respect to SWW was recovered whereas isoelectric precipitation yielded only 1.41% solids. In relation to surimi the yield was 1.22% and 0.88% respectively. Heat coagulation reduced crude protein, crude fat and ash of SWW by 53.49%, 68.75% and 38.57% respectively whereas isoelectric precipitation reduced these parameters by 33.72%, 43.75% and 38.57% respectively. Heat coagulation reduced BOD and COD of SWW by 59.51% and 69.35% respectively whereas isoelectric precipitation reduced their levels by 52.92% and 63.9% respectively. Analysis of proximate composition of fish feed showed that the control using clam meat and the two feeds using recovered solids showed similar composition. Thus the use of these recovered solids in fish feed as an animal protein source is a possibility. This study recommends to surimi industry, two methods that are comparatively cheap and easy to implement for recovering solids from SWW. Heat coagulation and isoelectric precipitation can effectively recover solids from SWW and improve its quality. However, heat coagulation is the more efficient method of the two. After solid recovery, the wash water effluents are rendered safer. The recovered solids can serve as a good substitute to clam meat in the fish feed preparation even though the quantum of proteins recovered are relatively small.ThesisItem Open Access Indebtedness of farmers in mullankolly panchayath of Wayanad district(Department of Rural Banking and Finance managementCollege of Co-operation,Banking &Management, Vellanikkara, 2010) Nataraja Subramanian, S; KAU; Padmini, E.V.KThe study entitled “Indebtedness of Farmers in Mullankolly Panchayat of Wayanad District” was conducted with the following objectives: (1).To assess the extent and magnitude of indebtedness of farmers in Mullankolly Panchayat of Wayanad district. (2).To identify the reasons for the indebtedness of the farmers. Both primary and secondary data were used for the study. Primary data was collected from 90 farmers of Mullankolly Panchayat through conducting a survey by administering a pre-structured schedule. Farmers were classified into small, medium and large. The list of farmers was collected from three banks (i.e. Canara Bank, Co-operative Bank and North Malabara Gramin Bank) of the Panchayat. The sample size included 90 respondents i.e., 30 borrowers from each bank at random, of which 20 were defaulters and five were non-defaulters or prompt payers. Twenty officials (including secretaries and BoDs) from each bank were also interviewed to collect information on the effectiveness of the loan recovery system of the banks. Secondary data on selected performance indicators of the banks which were collected from books and accounts and annual reports of the above three banks were also used for the study. Statistical tools like Average Annual Growth Rate (AAGR), simple averages, percentages, simple growth rate, chi-square test, efficiency index, priority index and bi-variate tables were used for the analysis. The analysis of the overdue amount of the selected banks revealed that during the reference period, Co-operative Bank of Mullankolly Panchayat (Co.BMP) had the highest amount of overdues. Profits of all banks eroded due to provisioning for accumulated overdues. Ca.BMP has shown the best performance in terms of lower overdues and higher profits when compared to the other banks. There has been an increase in the demand for agricultural loans as well as non-agricultural loans in all the banks, especially the scheme loans and non-farm loans respectively. Along with the increase in demand, the contribution of the overdues of non-agricultural loans to the overdues was also increasing tremendously in the case of Co.BMP and NMGBMP, whereas the contribution of the overdues of agricultural loans to the overdues was in creasing tremendously in the case of Ca.BMP. The overdues above four years were growing tremendously over the years for Co.BMP and NMGBMP whereas Ca.BMP has the highest amount of overdues in the age group of indebtedness of 1 to 2 years. The study found that in non defaulters’ case majority of the borrowers belong to monthly income group of more than Rs.10000 category (56.7%). In low, medium and high defaulters case, majority of the farmers belong to income group of below Rs.5000 i.e. 50 percent, 57.1 percent and 60 percent respectively. This may be due to the reason that majority of the farmer defaulters belong to farming community. Their major source of income is agriculture and agriculture has become a loss making proposition in the area year by year because of the price fluctuations in the market for their produce. The reasons for growing volume of indebtedness were multifarious in nature. The defaulters were of the view that inadequate income, fixation of unrealistic dues, lack of access to consumption loans, diversion of income, misutilisation of loans, ill health of borrowers and family members, faith in loan waiver policy and defective loan policies resulted in non-repayment of the loan amount. Since the loan repayment mechanism of these banks were not linked to the salary deduction scheme, it led to greater chances of willful default. Those borrowers who received adequate income had a tendency for conspicuous consumption which added to the magnitude of willful default. Misutilisation of loan amount was least in Ca.BMP, which indicates the presence of effective supervision and monitoring mechanism in the bank. From the inter-bank comparison on the effectiveness of the present loan recovery management system, it was found that Ca.BMP showed an outstanding performance in this regard, whereas NMGBMP revealed to be the least efficient bank. According to the officials and employees of three banks, the reasons for poor recovery included poor member relations, lack of modern management techniques and absence of Management Information System, lack of staff training programme, lack of infrastructural facilities, inadequate quality of work environment and ineffective legal machinery for recovering dues from the borrowers. As a remedial measure to minimise overdues, legal machinery has to be made effective and legal action should be imposed on defaulters promptly. The suggestion shows that the analysing credit worthiness of the borrowers is the important thing from bankers’ point of view. They were of the opinion that coercive action against willful defaulters would be an essential element for a better recovery system. Formation of special recovery cell has also been emphasised. Identification of the beneficiaries by the bank field level functionaries, incentives for prompt repayment, formation of special recovery cell using the existing staff and Board of Directors are the other suggestions suggested by the three bank officials. The banks must therefore perceive that prolonged existence of this disease is not beneficial to the organisation and a strong mechanism to check this menace has to be created.ThesisItem Open Access Effect of coconut oil on lipid profile and antioxident status in rats(Department of Veterinary Biochemistry,College of Veterinary and Animal Sciences, Mannuthy, 2010) Sreeji, K.P; KAU; Sisilamma, GeorgeThe study was conducted to evaluate the effect of various preparations of coconut oil (copra oil, seasoned coconut oil and virgin coconut oil) and fish oil on lipid profile and antioxidant status in rats. Adult male Wistar rats (180-220 g) were randomly divided into five groups and administered with oils as follows: G1 – normal control (NC), G2 – copra oil (CO), G3 – seasoned coconut oil (SCO), G4 - virgin coconut oil (VCO) and G5 – fish oil (FO). Oils were administered orally to rats at a dose of 16.4g/kg body weight per day using an orogastric tube for a period of 90 days. Blood samples were collected on day 0 (before oil administration), 45 and 90 and serum was separated. Body weight was also recorded on the above days. Animals were euthanized on day 90; liver and heart were separated and weighed. Serum were analyzed for biochemical parameters viz., TAG, TL, TC, HDL, LDL and VLDL and tissues for TC, TAG, LP and GSH. Liver glycogen was also estimated. Representative samples of liver and heart tissues were subjected to histopathological examination. Administration of CO and SCO for 3 months did not show any significant variation in body weight. VCO administration significantly (P< 0.05) decreased whereas, FO administration significantly (P< 0.05) increased the body weight, when compared to NC. Serum TAG and VLDL were significantly (P< 0.05) increased while, LDL was decreased by CO administration. Serum TL, TC and HDL were similar to that of NC. SCO administered rats showed significantly (P< 0.05) higher levels of TL, TC, TAG, HDL, LDL and VLDL. VCO administration significantly (P< 0.05) increased the level of HDL and decreased LDL. Moreover, VCO administered rats did not show any significant variation in the levels of TL, TAG, TC and VLDL. Administration of FO showed the levels of TC, HDL and VLDL similar to that of NC, but TAG increased significantly (P< 0.05) and TL and LDL showed a significant (P< 0.05) reduction. When HDL/LDL ratio was compared, CO, VCO and FO administered rats showed higher values when compared to NC. SCO administered rats, showed a value similar to that of day 0 but VCO administered group showed the highest value. Administration of CO and FO significantly (P< 0.05) increased the weight of liver and heart while VCO administration did not show any significant variation from that of NC. SCO significantly (P< 0.05) decreased weight of liver whereas, weight of heart was similar to that of NC. Level of liver glycogen decreased significantly (P< 0.05) in all oil administered groups except VCO, which showed a level similar to that of NC. Administration of CO significantly (P< 0.05) increased the level of TC in heart and TAG in both the tissues, while TC in liver was similar to that of NC. SCO administration significantly (P< 0.05) increased TC whereas, the TAG levels were similar to that of NC in both the tissues. VCO consumption significantly (P< 0.05) decreased the level of TC in both the tissues, while it increased TAG in heart without affecting liver TAG. FO administration did not show any significant variation in the level of TC and TAG in heart, but it significantly (P< 0.05) decreased the level of TC without affecting liver TAG. Administration of CO and FO significantly (P< 0.05) increased the levels of LP and GSH in both the tissues except for liver GSH in FO group, which was similar to that of NC. Feeding SCO maintained the level of LP in both the tissues, while GSH increased significantly (P< 0.05) in heart while its level in liver was unaffected. VCO intake significantly (P< 0.05) reduced the level of both LP and GSH in heart, but maintained the normal level in liver. Hepatocytes of rats administered with CO showed diffused necrosis with vacuolation and central venous congestion and lesions in heart were characterized by congestion and moderate hyalinization. SCO administered rats showed dilatation of sinusoids and diffuse congestion of liver but histological architecture in heart tissue was normal. VCO and FO administration exhibited normal histological architecture of both liver and heart except for a mild degeneration of hepatocytes in VCO consumed group. Based on the above observations it could be suggested that long term consumption of VCO and FO might not cause any adverse effects on serum and tissue lipid profile except for oxidative stress by FO. CO and SCO feeding revealed some adverse effects, but it is worth mentioning that the dose of oil administered (16.4 g/kg body weight, i.e. 30 kg/head/year) was very high, which stands in between per capita world average consumption (17.8 kg/head/year) and consumption of developed western world (44 to 48 kg/head/year), also which is more than double the per capita coconut oil consumption in Kerala (14 kg/head/year). Therefore, consumption of CO and SCO at a lower dose or the per capita consumption in Kerala as stated above might not elicit adverse effects as observed in the present study.ThesisItem Open Access Effect of elevated CO2 concentration on growth and physiology of selected tropical tree seedlings(Department of Forest Management and Utilisation, College of Forestry, Vellanikkara, 2010) Neenu Somaraj; Gopakumar, SThe present study entitled “Effect of elevated CO2 concentration on growth and physiology of selected tropical tree seedlings.” was carried out in College of Forestry, Kerala Agricultural University, Vellanikkara, Thrissur during the period 2008-2010. There are references that elevated CO2 typically increases tree seedling growth and has also modified physiological processes. Polybag seedlings of five economically important tree species were exposed to 500-550 ppm CO2 concentration and another similar set of plants were raised under ambient atmospheric CO2 condition (370-380 ppm). The growth rates and physiology were observed for eight months. Tree seedlings under elevated CO2 concentration put in more height and collar diameter than the seedlings under atmospheric CO2.A higher leaf production and larger leaf area was recorded in seedlings under elevated CO2 concentration. The different levels of CO2 also showed significant effects on the total dry matter content. However, interactions between two CO2 levels and five tree seedlings had no significant impact on the shoot: root ratios throughout the study period. The different CO2 treatment did not significantly affect the relative growth rate (RGR), net assimilation rate (NAR), specific leaf area (SLA) and the leaf area ratio (LAR) of seedlings. However, both CO2 levels showed significantly different impact on the leaf weight ratio (LWR) of seedlings. Seedlings under elevated CO2 recorded lowest number of stomata compared to seedlings under atmospheric CO2 concentration. The varying CO2 concentrations showed significant effect on the rate of photosynthesis of the tree seedlings. Chlorophyll a and Chlorophyll b in tree seedlings was not significantly influenced under different CO2 concentrations. However, total chlorophyll content showed significant influence. Seedlings under elevated CO2 recorded lowest soluble protein content compared to seedlings under atmospheric CO2 concentration. Hence, CO2 enrichment technique can be used as an economically viable nursery technology for production of more healthy and vigorous planting stock to meet the increasing demand for social forestry /agro forestry programme.