Utilization Of Energy And Nitrogen Of Setaria Sphacelata Var. Splendida Based Diets By Dairy Bulls
Mamat, Mustapha (1987) Utilization Of Energy And Nitrogen Of Setaria Sphacelata Var. Splendida Based Diets By Dairy Bulls. PhD thesis, Universiti Pertanian Malaysia.
Three experiments were conducted at the Dairy Farm, Department of Animal Sciences , Universiti Pertanian Malaysia , Serdang , using four cross-bred dairy bulls , Jersey O X Local Indian Dairy Q. The main objective o f the study was to evaluate the effects of nitrogen fertilization and supplementation with urea and leucaena on the nutritive value and utilization of Setaria sphacelata var . splendida in cattle . The indices measured included rumen degradability , in vivo digestibility , feed intake and the concentration of ammonia-N in the rumen liqour . In the balance studies , nitrogen intake and nitrogen balance were determined . The results o f Experiment I showed that the yields o f dry matter and nitrogen of the fertilize d were higher than those of the unfertilized forages , but the response ( kg per kg nitrogen applied) in both dry matter and nitrogen was decreasing with increasing nitrogen fertilization . The highest response in dry matter was recorded at 26 . 6 kg/kg N applied; while that for crude protein was 4 . 0 kg/kg N applied . The highest nitrogen recovery was found to be 64 . 2 kg N / 100 kg applied . These were achieved at the fertilization rate o f 250 kg N/ha per year .
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