添加不同水平苜蓿对奶牛生产性能及经济效益的影响

Effects of Alfalfa at Different Levels on Production Performance and Economic Benefit of Cows

选取河北省沧州地区奶牛养殖小区体重、产奶量、胎次、泌乳期相近的荷斯坦奶牛40头,随机分为4组,对照组日粮组成为秸秆加精料,试验组添加不同水平苜蓿干草,分析对奶牛生产性能及经济效益的影响。结果表明,试验组与对照组相比产奶量显著提高,差异极显著(P<0.01);乳脂率降低,差异不显著(P>0.05);乳蛋白、非脂乳固形物极显著提高(P<0.01);体细胞数显著下降(P<0.05)。添加苜蓿使牛奶品质得到明显改善。经济效益分析表明,日粮中添加苜蓿能显著提高奶产业种、养、加链条的整体效益。

A total of 40 Holstein cows were selected from cow breeding areas in Cangzhou City of Hebei Province.They had similar body weight,milk yield and parity as well as close lactation period.These cows were randomly assigned to four groups.The cows in control group were fed with straw and concentrate.The cows in the other three experimental groups were fed with diets added alfalfa hay at different levels.The production performance and economic benefit of cows were analyzed.The results showed that the milk yield,milk protein content and non-fat milk solid content were significantly higher in the cows of the experimental groups than in those of the control group （P〈 0.01）,but the fat percentage and somatic cell count were lower in the former than in the latter （fat percentage,P〉0.05;somatic cell count,P〈0.05）.Therefore,alfalfa improved milk quality.Economic benefit analysis showed that diets containing alfalfa greatly increased the overall efficiency of cultivation,breeding and processing.