苎麻青贮替代苜蓿干草对奶牛生产性能、乳成分及血清指标的影响

发布时间：2018-03-26 11:09

本文选题：苎麻青贮　切入点：荷斯坦奶牛　出处：《动物营养学报》2017年05期

【摘要】：本试验旨在研究苎麻青贮替代饲粮中苜蓿干草对奶牛生产性能、乳成分及血清指标的影响。选用24头体重、胎次、产奶量接近的健康荷斯坦奶牛,随机分为4组,每组6头,各组以苎麻青贮分别等量替代基础饲粮中0(对照组)、33%(试验1组)、67%(试验2组)和100%的苜蓿干草(试验3组)。预试期14 d,正试期60 d。结果表明:1)苎麻青贮中的粗蛋白质、粗脂肪、粗纤维以及粗灰分的含量均高于苜蓿干草。2)苎麻青贮替代苜蓿干草对奶牛干物质采食量、产奶量及乳成分含量均无显著影响(P0.05)。3)苎麻青贮替代苜蓿干草对血清中总蛋白、白蛋白、葡萄糖、甘油三酯、谷胱甘肽过氧化物酶含量及谷草转氨酶、谷丙转氨酶活性均无显著影响(P0.05)。4)试验3组的血清尿素氮含量显著高于试验1组和试验2组(P0.05),与对照组之间无显著差异(P0.05)。5)对照组和试验1组血清总胆固醇含量显著高于试验2组(P0.05),试验2组与试验3组之间无显著差异(P0.05)。6)随着苎麻青贮添加比例的增加,血清总抗氧化能力和超氧化物歧化酶含量逐渐升高,试验3组显著高于对照组(P0.05)。综合得出,苎麻青贮可以替代奶牛饲粮中苜蓿干草,而不影响生产性能、乳成分及血清指标,适宜的替代比例为33%~67%。
[Abstract]:The purpose of this experiment was to study the effect of alfalfa hay in Ramie silage substitute diet on the performance, milk composition and serum index of dairy cows. 24 healthy Holstein cows with similar body weight, birth order and milk yield were randomly divided into 4 groups, 6 in each group. The crude protein and fat of Ramie silage were replaced by the same amount of Ramie silage in the basal diet of 0 (control group 1) and 100% alfalfa hay (experiment 3, 14 days and 60 days, respectively). The results showed that the crude protein and fat in Ramie silage were 1%. The contents of crude fiber and crude ash were higher than that of alfalfa hay. 2) the total protein and albumin of Ramie silage replacing alfalfa hay had no significant effect on dry matter intake, milk yield and milk composition content of cows. Glucose, triglyceride, glutathione peroxidase and aspartate aminotransferase, Serum urea nitrogen content in group 3 was significantly higher than that in group 1 and group 2, but there was no significant difference between group 1 and control group (P 0.05%. 5) the serum total cholesterol content of control group and test group 1 was significantly higher than that of group 1. There was no significant difference between group 2 and group 3 (P 0.05 路6) with the increase of the proportion of Ramie silage. Serum total antioxidant capacity and superoxide dismutase (SOD) content increased gradually, and the results showed that Ramie silage could replace alfalfa hay in dairy cattle diet without affecting production performance, milk composition and serum index. The suitable substitution ratio is 33% and 67%.
【作者单位】：中国农业科学院麻类研究所;湖南省畜牧兽医研究所;湖南德人牧业有限公司;
【基金】：中国农业科学院农业科学与技术创新工程专项资金(ASTIP-IBFC02) 湖南省重点研发计划(2016NK2170)
【分类号】：S823.5

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