Influence of Bovine Somatotropin and replacement of corn dextrose with concentrate on the performance of mid-lactating buffaloes fed urea-treated wheat straw
2007
Sarwar, M., University of Agriculture, Institute of Animal Nutrition and Feed Technology, Faisalabad (Pakistan) | Shahzad, M.A., University of Agriculture, Institute of Animal Nutrition and Feed Technology, Faisalabad (Pakistan) | Nisa, M., University of Agriculture, Institute of Animal Nutrition and Feed Technology, Faisalabad (Pakistan) | Sufyan, A., University of Agriculture, Institute of Animal Nutrition and Feed Technology, Faisalabad (Pakistan)
The study examined the effect of bovine somatotropin (bST) in mid-lactating Nili-Ravi buffaloes (n equals 18) given varying levels of Enzose (corn dextrose) in a urea-treated wheat straw (UTWS) based ration on nutrient intake, digestibility, nitrogen (N) utilisation, milk yield, and its composition in a completely randomised design with a 2 × 3 factorial arrangement. The control ration contained 60% UTWS and 40% concentrate. The other 2 rations were formulated to replace 50% or 100% concentrate portions of the ration with Enzose of equivalent energy. Enzose is a liquid derived from the enzymatic conversion of corn starch to dextrose, and is light amber in colour. These rations were offered to buffaloes administered 0 or 250 mg bST, biweekly, for a period of 100 days. The bST administration increased (P 0.05) dry matter (DM), crude protein (CP), nitrogen (N) retention, neutral detergent fibre (NDF), and acid detergent fibre (ADF) intakes. Buffaloes fed a ration containing 50% Enzose as replaced by concentrate had higher DM, CP, NDF, and ADF intakes than those fed 100% Enzose. The NDF and ADF digestibilities, daily milk yield, and milk fat% were also increased by bST administration while the reverse was true for buffaloes fed replacement of 100% concentrate. Overall N balance was not affected either by bST administration or Enzose addition to the ration. Enzose interacted (P 0.05) with bST for milk yield and milk ash contents. The bST administration in buffaloes increased milk production by 37%. Up to 50% concentrate can be replaced with Enzose in the ration.
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