EFFECT OF SUPPLEMENTATION OF EXOGENOUS FIBROLYTIC ENZYMES IN EARLY LACTATING CROSSBRED DAIRY COWS
| dc.contributor.advisor | Dr. George Sherin K | |
| dc.contributor.author | NIMMY MICHAEL | |
| dc.date.accessioned | 2024-03-18T11:08:00Z | |
| dc.date.available | 2024-03-18T11:08:00Z | |
| dc.date.issued | 2022-01-02 | |
| dc.description.abstract | A study was conducted to examine the effect of supplementation of exogenous fibrolytic enzymes (EFE) carboxymethylcellulase (CMC) and xylanase (Xy) in early lactating crossbred dairy cows fed on total mixed ration (TMR). Fifteen cows within ten days of calving were selected from University Livestock Farm and Fodder Research and Development Scheme, Mannuthy and were divided into three groups according to completely randomized design. The animals were fed with isonitrogenous TMR (3.5 per cent of body weight) for a period of 90 days and the dietary treatments were; T1 - the control diet (60 per cent TDN, 13 per cent CP), T2 - control diet supplemented with EFE (CMC 3500 units/kg and Xy 16000 units/kg), and T3 - diet lower in TDN (55 per cent TDN, 13 per cent CP) supplemented with EFE (CMC 3500 units/kg and Xy 16000 units/kg). A digestibility trial of five days duration was carried out at the end of feeding trial. Average daily dry matter intake, digestibility of nutrients (dry matter, crude protein, crude fibre, ether extract, nitrogen free extract, neutral detergent fibre and acid detergent fibre), milk yield and body weight of animals remained similar (p>0.05) in all the groups. Milk composition remained similar, except for milk urea nitrogen which was lower (p<0.01) in enzyme supplemented groups. Digestibility trial revealed that TDN content (per cent) of the ration fed to the groups T1 and T3 were similar (p>0.05) and the value observed for T2 was higher (p<0.05) when compared to that of T3 and was similar (p>0.05) to that of T1. The serum biochemical parameters such as glucose, total protein, blood urea nitrogen, calcium and albumin remained unaffected with the treatment. Rumen fermentation parameters such as rumen pH and the concentration of rumen ammonia nitrogen and acetate were similar among the groups however, total volatile fatty acid concentration was lower (p<0.05) in T3 than T1. EFE supplemented groups (T2 and T3) had lower feed cost per kg milk produced and the values in dietary treatments T1, T2 and T3 were Rs. 20.94, 20.45 and 18.49, respectively. On summarizing the overall results, it could be inferred that EFE supplementation in cows during early lactation improved the TDN content of ration and reduced the feed cost. Hence it appears more beneficial in paddy straw based total mixed ration formulated with low TDN, since the dry matter intake, digestibility of nutrients and milk yield in cows fed with TMR having low TDN supplemented with EFE had comparable values with those offered with TMR having higher TDN. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810207532 | |
| dc.keywords | EFFECT OF SUPPLEMENTATION OF EXOGENOUS FIBROLYTIC ENZYMES IN EARLY LACTATING CROSSBRED DAIRY COWS | |
| dc.keywords | EXOGENOUS FIBROLYTIC ENZYMES | |
| dc.keywords | CROSSBRED DAIRY COWS | |
| dc.keywords | Direct hydrolysis | |
| dc.keywords | Dry matter intake and body weight | |
| dc.language.iso | English | |
| dc.pages | 146 | |
| dc.publisher | COLLEGE OF VETERINARY AND ANIMAL SCIENCES , MANNUTHY, THRISSUR, KERALA VETERINARY AND ANIMAL SCIENCES UNIVERSITY | |
| dc.research.problem | To assess the effect of supplementation of exogenous fibrolytic enzymes (EFE) in Total Mixed Ration (TMR) on d. Dry matter intake and digestibility e. Efficiency of milk production f. Techno-economics of production | |
| dc.sub | Animal Nutrition | |
| dc.theme | Effect of supplementation of exogenous fibrolytic enzymes in early lactating crossbred dairy cows | |
| dc.these.type | M.V.Sc. | |
| dc.title | EFFECT OF SUPPLEMENTATION OF EXOGENOUS FIBROLYTIC ENZYMES IN EARLY LACTATING CROSSBRED DAIRY COWS | |
| dc.type | Thesis |