动物营养学报2016，Vol.28Issue(5)：1573-1580,8.DOI:10.3969/j.issn.1006-267x.2016.05.035
生长期秦川牛能量代谢规律与需要量研究
Energy Metabolism and Requirement of Growing Qinchuan Cattle
摘要
Abstract
This experiment was conducted to investigate the energy metabolism and requirement of growing Qinchuan cattle. Thirty healthy growing bulls of Qinchuan cattle with similar body weight [ ( 336. 33 ± 18.28) kg] were selected and randomly divided into 5 groups with 6 heads in each group. Cattle were fed 5 di⁃ets with different levels of energy, which were formulated according to 85. 0% ( group Ⅰ) , 92. 5% ( groupⅡ) , 100.0% ( group Ⅲ) , 107. 5% ( group Ⅳ) and 115. 0% ( group Ⅴ) of net energy for the expected weight gain of 900 g/d [ China Feeding Stantard of Beef Cattle( NY/T 815—2004) ] , respectively. Feeding test and digestion and metabolism test were carried out to measure the growth performance and energy metabo⁃lism indexes of growing Qinchuan cattle, and to build the models for predicting the digestive energy require⁃ment and energy metabolism requirement. Pre⁃test period was 10 days and test period was 42 days. The results showed as follows:average daily gain of groupⅢ(880.15 g/d) was lower than the expected result;the aver⁃age daily gain (1 160.10 g/d) and energy utilization efficiency of group Ⅳ were maximum; the average val⁃ues of gross energy digestibility, gross energy metabolic rate and digestive energy metabolic rate were (76.44± 3.23)%, (66.75±3.16)% and (87.31±0.54)%, respectively; the digestive energy requirement and metabo⁃lizable energy requirement of growing Qinchuan cattle could be estimated by the following equations: DER=0.778W0.75 + 37. 05ADG; MER=0. 668W0.75+33. 49ADG [ DER represented digestive energy requirement ( MJ/d) , MER represented metabolizable energy requirement ( MJ/d ) , W0.75 represented metabolic body weight ( kg) , and ADG represented average daily gain ( kg/d) ] . Overall, the digestive energy requirement and metabolizable energy requirement for maintenance of growing Qinchuan cattle are 0. 778 and 0.668 MJ/(kg W0.75·d), respectively. Digestible energy and metabolizable energy required for per kilogram of body weight gain are 37.05 and 33.49 MJ, respectively.关键词
秦川牛/消化能/代谢能/需要量Key words
Qinchuan cattle/digestive energy/metabolizable energy/requirement分类
农业科技引用本文复制引用
陈艳,王之盛,张晓明,王江,邹华围,蒋兴德,吴丹..生长期秦川牛能量代谢规律与需要量研究[J].动物营养学报,2016,28(5):1573-1580,8.基金项目
农业部公益性行业专项饲料营养价值与畜禽饲养标准研究与应用 （）
