Effects of Dietary Energy and Protein Levels on Growth Performance,Serum Biochemical Indices, Slaughter Performance and Meat Quality of Shanbei White Cashmere Goats
The purpose of this study was to investigate the effects of dietary energy and protein levels on growth performance, serum biochemical indices, slaughter performance and meat quality of Shanbei white cashmere goats. Seventy-six Shanbei white cashmere goats aged 8 to 9 months were selected and divided into two groups with 38 goats per group. In diet for goats in the test group, metabolic energy was 9.24 MJ/kg, and crude protein content was 9.37％; in diet for goats in the control group, metabolic energy was 8.60 MJ/kg, and crude protein content was 8.73％. The experiment lasted for 65 days with the first 10 days of pre-trial peri-od. The results showed that compared with the control group, average daily gain, slaughter rate, loin muscle area, GR value and ether extract content in the test group were significantly higher ( P<0.05); other growth performance indices ( final body weight, dry matter intake and feed to gain ratio) , slaughter performance indi-ces ( carcass weight, carcass cuts and their proportions) , meat quality indices and serum biochemical indices were not significantly different between groups ( P>0. 05 ) . The results indicate that during the fattening process, dietary crude protein content increases from 8. 73％ to 9. 37％, and metabolic energy increases from 8.60 MJ/kg to 9.24 MJ/kg, growth performance and slaughter performance of Shanbei white cashmere goats can be significantly increased.
Shanbei white cashmere goatenergy levelprotein levelgrowth performanceslaughter per-formancemeat quality
国家科技期刊平台
NSTL
万方数据
维普
