Browsing by Author "Kumar, R."
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ThesisItem Open Access Adoption and sustainability of goat health technologies among farmers in different agro-climatic zones of Bihar(IVRI, Izzat Nagar, 2012) Kumar, R.; Singh, B. P.ThesisItem Open Access Assessment of mineral status and supplementation studies in dairy cattle(CSKHPKV, Palampur, 2005) Verma, Madan Singh; Kumar, R.ThesisItem Open Access CHARACTERIZATION AND DISTRIBUTION PATTERN OF HEAVY METALS (Co, Ni & Pb) IN SOILS OF JHARKHAND(Birsa Agricultural University, Kanke, Ranchi, Jharkhand, 2008) Kumar, Rakesh; Kumar, R.Surface and profile samples were collected from different locations and toposequences covering three agro-climatic zones of Jharkhand viz. zone-IV (Baliapur, Jharia & Dhanbad), zone-V (Bagru, Pakharpat, Kisko & Lohardaga) and zone-VI (Moshabani, Jadugonda & Chandil). Total number of surface soil samples were 225 and 9 soil profiles, were examined. Analyses of soil pH, organic carbon and calcium carbonate revealed that content of these metals were maximum in lowland soils followed by midland and upland. Soil pH in zone IV, V and VI ranged from 3.9-6.9, 5.0-6.7 and 4.0-6.6; organic carbon varied from 3.6-10.5 g kg-1, 1.09-10.2 g kg-1 and 3.8-10.4 g kg-1 whereas CaCO3 0.1-1.0%, 0.1-1.0% and 0.2-1.0% respectively. DTPA-extractable cobalt, nickel and lead in zone-IV were trace-2.08 mg kg-1, 0.06-2.5 mg kg-1 and 0.02-4.3 mg kg-1; in zone-V trace-1.3 mg kg-1, 0.06-2.2 mg kg-1and 0.62-2.22 mg kg-1 whereas in zone-VI trace-3.72 mg kg-1, 0.06-4.46 mg kg-1 and 0.48-2.7 mg kg-1 respectively. Total content of cobalt, nickel and lead in zone-IV were 72-163 mg kg-1, 147-472 mg kg-1 and 229-547 mg kg-1; in zone-V 61-141 mg kg-1, 122- 486 mg kg-1 and 177-711 mg kg-1 whereas in zone-VI 65-155 mg kg-1, 93-630 mg kg-1 and 173-662 mg kg-1 respectively. Higher amount of DTPA-extractable and total content of cobalt, nickel and lead was observed in lowland against the different topo-sequences. Profile study showed, soil pH and CaCO3 increased with increasing soil depth of profiles. On contrary, organic carbon of the soils declined with increasing depth. Higher values of CEC in subsurface horizons commensurate with the amount of clay. Comparatively less amount of DTPA-extractable and total content of cobalt, nickel and lead were observed in lower hprizons. DTPA-extractable cobalt, nickel and lead were highly negative and significant correlation with soil pH while positive and significantly correlated with organic carbon and clay content. A highly positive and significant correlation was found between total content of cobalt, nickel and lead with organic carbon. The study of step wise multiple regression equations showed more impact of soil pH, clay and organic carbon on available of cobalt, nickel and lead than other soil parameters whereas in case of total content, organic matter was important determining factor. Application of lime reduced the availability of cobalt, nickel and lead with increasing incubation periods. Hence, lime would be an effective amendment for the soils containing heavy metals (Co, Ni & Pb) in this region.ArticleItem Open Access Comparative efficacy of rHaa86 and rBm86 against Hyalomma anatolicum anatolicum and Rhipicephalus (Boophilus) microplus(Impact Factor, 2012-01) Kumar, B.; Azhahianambi, P.; Ray, D.D.; Chaudhuri, P.; Fuente, J. De La; Kumar, R.; Ghosh, S.; TANUVASHyalomma anatolicum anatolicum and Rhipicephalus (Boophilus) microplus are the most economically important tick species in India and other tropical and subtropical regions of the world and transmit pathogens causing animal and human diseases. We demonstrated that vaccination of animal by rHaa86 could be used for the control of both H. a. anatolicum and R. (B.) microplus infestations. By comparing the efficacy of rHaa86 and rBm86, it was observed that vaccine based on rHaa86 will be more effective in controlling homologous challenge infestations (68Æ7% against larvae and 45Æ8% against adults). The results of this trial demonstrated that species-specific antigens are the better choice for vaccine development and could serve as an effective tool for the integrated control of H. a. anatolicum.ArticleItem Open Access Concurrent occurrence of congenital spina bifida, arthrogryposis, bifid tail and atresia ani in a Calf(2015) Prasath, N. Babu; Selvaraj, J.; Kumar, R.; Sivakumar, m; TANUVASA one day old Holstein Friesian crossbred heifer calf brought to the clinics revealed a protruded irregularly round fleshy mass over the dorsal thoracic midline. Complete stiffness of both hind limbs, arthrogryposis of left fetlock joint, bifid tail and congenital closure of anal opening was recorded. On necropsy defective closure of vertebral laminae at thoracic region with prolapse of spinal column was observed. The case was diagnosed as a rare case of spina bifida at thoracic region in co-occurance with arthrogryposis, bifid tail and atresia ani.ArticleItem Open Access Effect of Aflatoxin and Cyclopiazonic Acid in Feed on the Performance of Broiler Chicken(Indian Veterinary Journal, 2005-11) Kumar, R.; Balachandran, C.; TANUVASThesisItem Open Access EFFECT OF REPRODUCTIVE STAGE DROUGHT ON RICE PHYSIOLOGY(Indira Gandhi Krishi Vishwavidyalya, Raipur, 2002) Kujur, Robinson Sudhir; Kumar, R.The present studies entitled "Effect of reproductive stage drought on rice physiology" was conducted at the Instructional Farm of IGAU, Raipur during wet season of 2000. The objectives of the study was to find out the effect of reproductive stage drought on dry matter production and its partitioning into various plant parts, photosynthetic stability, membrane stability, phenology, root growth, ability to maintain leaf water potential, contribution of stem to built grain yield, transpiration rate and yield of different rice varieties. Varieties were staggered in the nursery to match the phenological stages during experiment. Drought was imposed by stopping irrigation from fifteen days after panicle stage to maturity. Rain out shelters were used to protect the drought plots from rains. Dry matter production capacity reduced under drought as the drought progress from flowering to maturity. The ability to maintain higher leaf water potential and photosynthetic stability was related with stability in dry matter production under drought. Drought tended to delay the flowering. The delay in flowering due to drought was associated with higher yield reduction. It was noticed that membrane stability contributes significantly to the drought resistance at reproductive stage drought. Crop growth and grain yield under drought was strongly influenced by the root growth. The varieties with good root system keeps the aerial parts well supplied with water. Such a regular flow of water was also reflected in higher transpiration rate. Translocation of dry matter from stem increases under drought conditions and was related with yield stability. The reproductive stage drought resistance in rice was related with photosynthetic stability, maintenance of higher leaf water potential, higher remobilization of stored assimilates to grain, higher root growth and less delay in flowering.ThesisItem Open Access Effects Of Moisture Stress On Photosynthesis And Nitrogen Metabolism In Sunflower (Helianthus Annuus L.)(IARI, Division of Plant Physiology : New Delhi, 1991) Kumar, R.; Srivastava, G. C.ArticleItem Open Access Evaluation of Liver Lipid Peroxidation and Antioxidant Profile in Broiler Chicken Fed with Mixture of T-2 Toxin and Endosulfan(Indian Journal of Veterinary Pathology, 2016) Kumar, R.; Balachandran, C.; Manohar, B. Murali; Rao, G.V. Sudhakar; TANUVASThe combined feeding of 0.5 ppm T-2 toxin and 20 ppm of endosulfan for four weeks significantly (P<0.05) increased the liver lipid peroxidation in the T-2 toxin+endosulfan treated group compared to the control in experimental broiler birds. The endosulfan treated group showed significant (P<0.05) increase in the GST values compared to the control. The values of catalase decreased significantly (P<0.05) in all toxin treated groups compared to the control. No significant differences were observed for GSH, GPx and SOD between control and the toxin treated birds. The present study indicated that T-2 toxin and endosulfan combination caused considerable damage in the broiler birds.ArticleItem Open Access Genetic Evaluation of Grain Yield and Kernel Micronutrient Traits in Maize(2009) Chakraborti, M.; Hossain, F.; Kumar, R.; Gupta, H. S.; Prasanna, B. M.ArticleItem Open Access Haematological and Biochemical Alterations in Broiler Chicken Fed Aflatoxin and Cyclopiazonic Acid(Indian Veterinary Journal, 2005-12) Kumar, R.; Balachandran, C.; TANUVASArticleItem Open Access Histopathological Changes in Broiler Chickens Fed Aflatoxin and Cyclopiazonic Acid(2009) Kumar, R.; Balachandran, C.; TANUVASExperimental mycotoxicoses was induced into broiler chickens by feeding 1 ppm afl atoxin (AF) and 20 ppm cyclopiazonic acid (CPA) from 0 to 28 days of age to evaluate the gross and histopathological changes. Grossly, AF and AF-CPA fed birds showed enlargement, yellowish discoloration of the liver while the CPA fed birds showed enlargement and congestion. The CPA and AF-CPA fed birds showed thickening of crop and necrosis and thickening of proventricular mucosa. Histopathologically, degenerative and necrotic changes were observed in the liver, kidneys, intestine, pancreas, heart, pectoral muscle, spleen and bursa of Fabricius of all toxin fed birds. Besides, hyperplastic changes were also observed in the crop, proventriculus and gizzard in the CPA fed birds. The lesions were more marked in the AF-CPA group. The study revealed that AF and CPA in combination could act cumulatively and adversely affect the health of broiler chicken.ThesisItem Open Access Integrated Weed Management in Bt Cotton(Mahatma Phule Krishi Vidyapeeth, Rahuri, 2015) Kumar, R.; Kamble, A.B.; 630/KUMThesisItem Open Access Isolation and Identification of Bacillus species from soil for amylase production and phosphate solubilisation(SARDAR VALLABHBHAI PATEL UNIVERSITY OF AGRICULTURE & TECHNOLOGY, MEERUT, 2018) Kumari, Shambhavi; Kumar, R.Soil microorganisms play a vital role in maintaining the ecological balance by active participation in Carbon, Nitrogen, Sulphur, Phosphorus and Potassium cycles in nature. Phosphate solubilising microbes plays an important role in plant nutrition through increase in phosphate uptake by plants and is used as bio fertilizers of agricultural crops. Phosphate is second most vital macronutrient required for the growth and development of plants. The potassium solubilising microorganisms (KSMs) are rhizospheric microorganism which solubilises the insoluble potassium (K) to soluble forms of K for plant growth and yield. K-solubilisation is carried out by a large number of saprophytic bacteria. Amylases are the enzymes that break down complex carbohydrates. Amylases are amongst the most widely used enzymes in industries such as food, fermentation, starch processing, textile and paper. Plants, animals and microbes can produce amylases. Microbial amylase have a broad spectrum of industrial applications as they are more stable with great genetic diversity, high enzymatic activity in a wide range of condition and (extreme pH, temperature, osmolarity, pressure etc) simple and cost effective production and easy manipulation to obtain enzymes of desired characteristics. The aim of this study was to isolate ten different Bacillus isolates from various soil samples and their identification on the basis of Gram staining, colony morphology and biochemical tests. Gram positive rod shaped bacteria showing large, circular, opaque colonies having white or greyish white appearance were preserved on Nutrient agar slants for further identification tests. All the isolates showed positive results for Catalase, Urease, Oxidase and motility tests. For other Biochemical tests mixed results were obtained. Phosphate solubilisation and Potassium solubilisation activities of different isolates was performed. Out of ten isolates, none of the isolates solubilised phosphate on Pikovskaya’s agar medium at 30°C after 15 days of incubation. Potassium solubilising activity was shown by two isolates (Sample code 3 and 9) out of ten. Among these two isolates, Sample code 3 showed highest potassium solubilisation and the clear zone measured on Aleksandrov agar medium was 9mm and that of Sample Code 9 was 5mm after 10 days of incubation at 30°C. The isolates were screened for the production of amylase and its assay has been performed. Seven isolates displayed zone of clearance in starch hydrolysis test except Sample code 5, 7 and 8. Sample code 5, 7 and 8 were the only isolates that gave negative results for TSI tests among all ten isolates. The isolates were subjected to amylase activity test. Maximum amylase was produced by Sample code 9 i.e. 3.90 mg/ml after 24 hours of incubation. Sample code 10 showed least amylase production i.e. 0.86 mg/ml.ArticleItem Open Access Mitigating nitrous oxide emission from soil under conventional and no-tillage in wheat using nitrification inhibitors(2010) Bhatia, A.; sasmal, S.; Jain, N.; Pathak, H.; Kumar, R.; Singh, A.ArticleItem Open Access Performance of a New Superabsorbent Polymer on Seedling and Post Planting Growth and Water Use Pattern of Chrysanthemum Grown under Controlled Environment(2007) Anupama; Singh, M. C.; Kumar, R.; Parmar, B. S.; Kumar A.ThesisItem Open Access Physiological And Cytological Studies In Loquaat ( Eriobotrya Japonica Lind ), And Guava ( Psidium Guajava Linn ).With Special Reference To Induction Of Seedlessness.(IARI, Division of Horticulture : New Delhi, 1963) Kumar, R.; Singh, R. N.ThesisItem Open Access Studies on metabolic profile with special reference to mineral imbalance in pregnant crossbred ewes of Himachal-Pradesh(CSKHPKV, Palampur, 2002) Aggarwal, Shagun; Kumar, R.