日粮精粗比对奶牛瘤胃发酵及泌乳性能的影响

被引：54
|
作者：
汪水平 [1 ]
王文娟 [1 ]
王加启 [2 ]
谭支良 [1 ]
龚月生 [3 ]
机构：
[1] 中国科学院亚热带农业生态研究所
[2] 中国农业科学院畜牧研究所
[3] 西北农林科技大学动物科技学院
来源：
西北农林科技大学学报(自然科学版) | 2007年 / 06期
关键词：
日粮精粗比; 瘤胃发酵; 泌乳性能; 奶牛;
D O I：
10.13207/j.cnki.jnwafu.2007.06.010
中图分类号：
S823.5 [];
学科分类号：
090502 ;
摘要：
选择4头安装有永久性瘤胃瘘管的泌乳奶牛,按4×4拉丁方设计,分别饲喂精粗比约为30∶70的“高低质粗料型”日粮、30∶70的混合型高青贮日粮、50∶50的精粗料比例相当的日粮及65∶35的高精料日粮等4种不同精粗比日粮,研究日粮精粗比对奶牛瘤胃发酵及泌乳性能的影响。结果显示,日粮精粗比对奶牛瘤胃pH值,氨氮质量浓度,总挥发性脂肪酸、丙酸、丁酸的浓度和乙酸/丙酸、(乙酸+丁酸)/丙酸有显著(P<0.05)或极显著(P<0.01)影响,而对瘤胃乙酸浓度影响不显著(P>0.05);饲喂不同精粗比日粮,奶牛乳产量、4%标准乳产量均有显著(P<0.05)或极显著(P<0.01)差异,而乳脂、乳蛋白、乳糖、非脂固形物及总固形物的含量差异均不显著(P>0.05),但其产量随乳产量的增加而增加,存在显著(P<0.05)或极显著(P<0.01)差异。结果表明,4种精粗比日粮能使瘤胃发酵和乳成分含量保持稳定,但影响瘤胃挥发性脂肪酸浓度和乳产量;低质和优质粗料的合理搭配有利于稳定瘤胃内环境和乳脂含量,且能改善泌乳性能。
引用
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页码：44 / 50
页数：7
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