NUTRITIONAL EVALUATION OF APBN1 GRASS AND EFFECT OF PROTEIN SUPPLEMENTATION ON THE PERFORMANCE OF DECCANI SHEEP
| dc.contributor.advisor | RAMANA REDDY, Y(MAJOR) | |
| dc.contributor.advisor | NAGALAKSHMI, D | |
| dc.contributor.advisor | MAHENDER, M | |
| dc.contributor.author | JAGADISH, Ch | |
| dc.date.accessioned | 2018-12-04T11:26:44Z | |
| dc.date.available | 2018-12-04T11:26:44Z | |
| dc.date.issued | 2005-06 | |
| dc.description.abstract | ABSTRACT : Evaluation of the potential feeding value of APBN1, an improved variety of hybrid napier as the sole feed and in supplemented rations was carried out to develop a forage based feeding system for intensive rearing of sheep. APBN1 forage samples harvested at 30, 40, 45, 50 and 60 days of growth were subjected to chemical, in vitro and in sacco evaluation to determine the optimum stage of harvesting for maximization of forage utilization in terms of fodder yield and nutritional quality. The yield of green fodder, dry matter and crude protein (MT/ha/yr) of APBN1 forage harvested at 30, 40, 45, 50 and 60 days of growth was found to be 274.68, 47.35, 7.44; 291.34, 61.09, 9.08; 344.74, 76.39, 11.45; 368.45, 85.26, 11.36 and 387.95, 98.81 and 11.21, respectively. The leaf to stem ratio of APBN1 forage at 30, 40, 45, 50 and 60 days of growth was found to be 0.36, 0.46, 0.65, 0.95 and 1.36, respectively. The dry matter content of forage increased from 17.24 per cent at 30 days to 25.47 per cent at 60 days of growth. The CP and CF values were 15.72, 23.81; 14.86, 24.67; 14.35, 25.32; 13.68, 26.64 and 11.34 and 29.88 per cent, respectively on DM basis for the forage samples harvested at 30, 40, 45, 50 and 60 days of growth. Progressive increase in crude fibre level and gradual decline in crude protein content was observed with the advancement in maturity of forage. The NFE content (46.12 %) was highest at 45 days of growth. The IVDMD value was highest (57.87 %) at 30 days and lowest (51.40 %) at 60 days of growth, when the forage samples were incubated with sheep rumen liquor. The effective degradable dry matter (EDDM) as determined by nylon bag technique in fistulated rams was 55.80, 54.70, 53.50, 52.40 and 43.78 per cent at 30, 40, 45, 50 and 60 days of growth, respectively. The effective protein degradability (EPD) decreased from 38.30 per cent at 30 days to 33.17 per cent at 60 days of growth. The insoluble but degradable protein fraction „b‟ was highest (77.07 %) at 45 days of growth. Based on the biomass yield, leaf to stem ratio, chemical, in vitro and in sacco evaluation, the optimum stage of harvesting for APBN1 forage was found to be at 45 days of growth. When the forage harvested at 45 days alone was fed ad libitum in chopped form, the rams on an average consumed 50.74, 4.40 and 28.34 g/kg W0.75 of DM, DCP and TDN respectively. The average digestibility coefficients of 66.63, 68.52, 69.10, 58.82, 56.34 and 62.21 per cent were observed for DM, OM, CP, EE, CF and NFE, respectively and the DCP and TDN values as 8.68 and 56.38 per cent were observed for APBN1 forage in Deccani rams. The Deccani rams on an average retained 5.28 g nitrogen per day. Effect of supplementation through protein and energy sources to the APBN1 forage was studied in adult Deccani rams. There was a significant increase in DM intake (g/kg W0.75) of rams supplemented with concentrate premix containing GNC + maize (71.10), SFC + maize (69.82) and CSC + maize (66.71) in comparison to that of the rams fed APBN1 forage (51.62) as the sole feed. Irrespective of the protein source, supplementation has enhanced the nutrient digestibility of rations in rams with the resultant improvement in DCP content of the ration by 72.78% (GNC), 35.64% (CSC) and 34.95% (SFC) and TDN value of ration by 26.80% (GNC), 21.59% (CSC) and 13.66% (SFC) in comparison to DCP (8.68%) and TDN (56.38%) of the ration containing APBN1 forage alone. There was a marked improvement (P<0.05) in nitrogen utilization with the net nitrogen retention (g/d) in rams supplemented with GNC + maize (15.13), SFC + maize (12.16) and CSC + maize (10.71) when compared to that of rams fed APBN1 forage (5.28) as the sole feed. It is concluded that APBN1 forage at 45 days of growth with DCP (8.68%) and TDN (56.38%) can be utilized as a potential maintenance type (perennial) green fodder for feeding adult sheep. Supplementation, irrespective of protein source, improved the nutrient intake, nutrient digestibility and nitrogen utilization of the rations containing APBN1 forage as the basal roughage and fulfilled the maintenance as well as growth requirements (70 g/d) of sheep. Supplementation through concentrate premix containing 125 g each of maize and GNC was found superior (P<0.05) in enhancing nutrient digestibility and nitrogen utilization of rams in comparison to other sources. Supplementation of critical nutrients to the basal roughage is a viable means of sustaining the optimum animal performance. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810085235 | |
| dc.keywords | DECCANI SHEEP;NUTRITIONAL EVALUATION;APBN1 GRASS;EFFECT;PROTEIN SUPPLEMENTATION;PERFORMANCE | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 115 | en_US |
| dc.publisher | SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA | en_US |
| dc.sub | Animal Genetics and Breeding | en_US |
| dc.subject | null | en_US |
| dc.theme | NUTRITIONAL EVALUATION OF APBN1 GRASS AND EFFECT OF PROTEIN SUPPLEMENTATION ON THE PERFORMANCE OF DECCANI SHEEP | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | NUTRITIONAL EVALUATION OF APBN1 GRASS AND EFFECT OF PROTEIN SUPPLEMENTATION ON THE PERFORMANCE OF DECCANI SHEEP | en_US |
| dc.type | Thesis | en_US |