日粮中添加不同浓度的富马酸对奶牛生产性能·血液指标的影响

目的]以延胡索酸为试验材料,研究其对泌乳中后期荷斯坦奶牛生产性能及血液生化指标的影响。方法]选取24头产犊日期、胎次、产奶量、体重相同或相近的泌乳早期的中国荷斯坦奶牛为试验动物,采用单因素随机区组试验设计,试验牛分成4组,每组6头,在日粮中分别添加富马酸0、40、80、120g/d。结果]试验组的干物质采食量较对照组分别提高0.86、1.83和1.52kg/d;产奶量分别提高0.86、2.22和2.30kg/d;而粗脂肪的表观消化率分别提高2.88%、2.05%和3.82%;中性洗涤纤维的表观消化率分别提高0.48%、4.63%和5.26%;试验组的乳脂率、乳蛋白率和非脂固形物较对照组均有所提高,但是差异不显著（P〉0.05）,而乳中尿素氮较对照组有所下降（P〉0.05）;试验组奶牛血清中的乳酸与对照组相比分别降低10.34%、24.30%和8.66%,而血清中血糖、尿素氮、甘油三酯、总胆固醇、乳酸脱氢酶的浓度与对照组差异不显著（P〉0.05）。结论]奶牛日粮中添加富马酸,对动物机体内的脂肪、蛋白和能量代谢无明显影响,但可提高奶牛的干物质采食量及营养物质的表观消化率,提高生产性能,改善奶品质。

Effect of Different Levels Fumaric Acid Supplement on Productivity and Blood Index of Dairy Cows

Objective]The experiment was conducted to study the effects of fumaric acid on the performance and blood index of Holstein cows during mid and late lactatation period.Method]Twenty-four lactating Holstein dairy cows were selected in the study.The study was conducted as single factor in a completely randomized design.The cows were allocated to four treatments.The cows in each treatment were supplemented 0,40,80,and 120 g/d fumaric acid separately.Result]Compaed with the control group,dry matter intake (DM...