Studies on supplementary desalted mother liquor on digestibility of nutrients, ruminal fermentation, and energy and nitrogen balance in Thai native cattle
Studies on supplementary desalted mother liquor on digestibility of nutrients, ruminal fermentation, and energy and nitrogen balance in Thai native cattle
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补充脱盐母液对泰国本土牛营养物质消化率、瘤胃发酵及能量和氮平衡的研究
DOI：
10.1111/asj.12790
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发表时间：
2017
影响因子：
2
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Sakai T;Angthong W;Takeda M;Oishi K;Hirooka H;Kumagai;H.
四个泰国本地阉牛被用来确定足够的补充脱盐母液（DML）的能量和氮平衡和瘤胃发酵的水平。干物质基础上，DML的粗蛋白和氯化钠含量分别为25.5%和60.3%。采用4 × 4拉丁方试验设计，在3种试验日粮（T1：1.1%，T2：2.2%，T3：3.4%NaCl + DML）中添加不同量的DML，并与对照日粮（C：1.0%DM）的效果进行比较。动物每天分别给予实验饲料和稻草，以DM为基础，分别为体重的1.2%和0.8%。各处理间养分表观消化率无显著差异。T3的氮存留率最低（P<0.05），其次为C、T2和T1。T1和T3组的能量存留率高于T2组，C组最低（P<0.05）。1%和2%的补充NaCl浓度可以用DML代替，而不会对营养物质的消化率或氮和能量保留产生不利影响。
Four Thai native steers were used to determine the adequate levels of supplementary desalted mother liquor (DML) for energy and nitrogen balances and ruminal fermentation. The crude protein and sodium chloride contents of DML were 25.5% and 60.3% on a dry matter (DM) basis, respectively. A 4 × 4 Latin square design experiment was conducted by adding different amounts of DML to three experimental diets (T1: 1.1%, T2: 2.2%, T3: 3.4% sodium chloride concentration with supplementary DML on a DM basis) and comparing their effects with those of a control diet (C) containing 1.0% commercial salt on a DM basis. The animals were given the experimental diets and rice straw daily at 1.2% and 0.8% of body weight, respectively, on a DM basis. No significant differences in the apparent digestibility of nutrients were observed among treatments. T3 achieved the lowest nitrogen retention (P<0.05), followed by C, T2 and T1. The ratios of energy retention to gross energy were higher in T1 and T3 than T2, and that in C was lowest (P<0.05). Supplementary NaCl concentration at 1% and 2% can be replaced with DML without an adverse effect on the digestibility of nutrients or on the nitrogen and energy retention.