动物营养学报Issue(4)：1252-1261,10.DOI:10.3969/j.issn.1006-267x.2015.04.032
饲粮能量和蛋白质水平对荷斯坦公牛生长育肥性能及血液生化指标的影响
Effects of Dietary Energy and Protein Levels on Growing-Fattening Performance and Blood Biochemical Indicators of Holstein Bulls
摘要
Abstract
The objective of this study was to evaluate the effects of different dietary energy and protein levels on growing⁃fattening performance and blood biochemical indicators of Holstein bulls to select the most appro⁃priate levels of nutrition parameters. Thirty Holstein bulls ( weighted about 180 kg, aged 4 to 5 months) were allocated into three groups with ten bulls in each group. The three groups were provided with different nutrition⁃al level diets: low energy and protein levels diet ( group Ⅰ) , medium energy and protein levels diet ( groupⅡ) and high energy and protein levels diet ( group Ⅲ) . The experiment lasted for 362 days. The results showed as follows:1) compared with groupⅠ, daily gain ( DG) in groupⅢwas significantly increased ( P<0.05) and that in group Ⅱ had an increasing trend (P>0.05), while feed/gain in group Ⅲ was decreased compared with that in groups Ⅰ and Ⅱ ( P>0.05) . 2) The contents of blood glucose and growth hormone in group Ⅲwere significantly increased compared with those in groupⅠ( P<0.05) , but no significant difference was found between groups Ⅱ and Ⅲ ( P>0.05) . The content of blood urea nitrogen in group Ⅲ was signifi⁃cantly decreased compared with that in groupⅠ ( P<0.05) . 3) With the increasing of dietary energy and pro⁃tein levels, apparent digestibility of crude protein and crude fat was raised, and group Ⅲ was significantly higher than groupⅠ(P<0.05). According to above results, net energy for lactation [NEL, MJ/(d·head)] and small intestinal digestible crude protein (IDCP) requirements [g/(d·head)] of growing⁃fattening Hol⁃stein bulls (weighted 180 to 500 kg) are calculated based on metabolic weight (W0.75, kg) and DG (kg) as follows: NEL=0.57W0.75+1.02DG (R2=0.936 8); IDCP=2.65W0.75+202.03DG (R2=0.892 9).关键词
荷斯坦公牛/能量/蛋白质/生长育肥性能/血液生化指标Key words
Holstein bull/energy/protein/growing-fattening performance/blood biochemical indicator分类
农业科技引用本文复制引用
李晓蒙,李秋凤,曹玉凤,高艳霞,于春起,杜柳柳,王晓玲,李建国..饲粮能量和蛋白质水平对荷斯坦公牛生长育肥性能及血液生化指标的影响[J].动物营养学报,2015,(4):1252-1261,10.基金项目
国家现代农业（肉牛）产业技术体系建设专项资金 （）
