Carcass traits, commercial cuts, tissue composition, intake, digestibility, and performance of Sindhi bulls subjected to feed restriction

ABSTRACT: This study showed the effect of feed restriction on performance, nitrogen balance (NB), microbial protein synthesis, carcass traits and meat cut of the thirty-two Sindhi non-castrated males (296 ± 21.3 kg initial BW and 21 ± 1.5 months old). All bulls were distributed in a completely randomized design with four treatments (feed restriction levels) (0, 15, 30, and 45% in total dry matter -DM) and the data were subjected to analysis of variance and regression. Nutrient intake, NB, final BW, total gain, feeding efficiency, carcass gain, hot and cold carcass weight, subcutaneous fat thickness, commercial cuts and fat tissue decreased linearly (P

摘要：本研究揭示了饲料限制对三十二头未去势的辛地公牛（初始体重296 ± 21.3公斤，年龄21 ± 1.5个月）性能、氮平衡（NB）、微生物蛋白合成、胴体性状及肉块的影响。所有公牛均按完全随机设计分配至四个处理组（饲料限制水平）（总干物质 -DM 0%、15%、30%和45%），数据经方差分析和回归分析处理。营养摄入、氮平衡、最终体重、总增重、饲料转化率、胴体增重、热冷胴体重、皮下脂肪厚度、商业切割和脂肪组织含量均呈现线性下降（P