Preliminary Study on Energy Metabolism and Energy Requirement of Early Lactation Water Buffalo

文献类型： 外文期刊

第一作者： Zou, Caixia

作者： Zou, Caixia;Yang, Bingzhuang;Wei, Shengju;Liang, Xianwei;Li, Shulu;Qin, Guangsheng;Yang, Chenjian

作者机构：

关键词： energy requirement;water buffalo;early lactation

期刊名称：BUFFALO BULLETIN （ 影响因子：0.172； 五年影响因子：0.234 ）

ISSN： 0125-6726

年卷期： 2013 年 32 卷

页码：

收录情况： SCI

摘要： The objective of this study was to investigate the energy requirement of early lactation water buffalo. Thirty healthy early lactation water buffalo, similar milk yield in the last lactation, 2 or 3 parities, were divided into 3 groups by randomized complete block design to carry out an energy balance trial. The animals were divided according to their milk yield, parity and received one of 3 diets containing the same forage but different concentrate mixtures of varying levels of net energy for lactation: 6.0, 6.6 and 7.2 MJ/kg, respectively. The elephant grass was the main ingredient of forage. The whole experiment was lasted 45 days with the first 15 days for adaptation. Seven-day digestion and 3 d respiratory gas metabolism tests were conducted on the 24th and 28th day of feeding trial, respectively. From the relationship between energy intake and heat production, the results showed that NEm=263.40KJ/(W-0.75.d)x120%=316.10 KJ/(W(0.75.)d) for early lactation water buffalo, the average milk energy was 4.4 MJ/kg, according to the formula: standard buffalo milk (kg) =milk yield (kg)x[(milk fat g(sic) 40)+(milk protein g(sic) 31)]x0.01155+1.0)(sic) Di Palo's equation (1992)(sic) , based on the average water buffalo milk protein, fat were 4.7% and 6.8% respectively, 1 kg water buffalo amount to 1.51 kg standard water buffalo milk, thus, produce 1 kg standard water buffalo milk require 2.915 MJ for net energy. The requirement for total net energy of early lactation water buffalo could be estimated by the following equations: NE (MJ/d) =0.316W(0.75.)d(sic) 0.2907x Delta WxW(0.75)(sic)2.915 FCM, where Delta W was average daily body weight change (kg/d).

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