不同硒源对泌乳中期荷斯坦奶牛生产性能、抗氧化性能及营养物质表观消化率的影响

发布时间：2018-03-26 13:14

本文选题：硒源　切入点：奶牛　出处：《动物营养学报》2017年04期

【摘要】：本试验旨在研究不同硒源对泌乳中期荷斯坦奶牛生产性能、抗氧化性能及营养物质表观消化率的影响。试验选取45头产奶量、胎次、泌乳日龄相近的健康中国荷斯坦奶牛,随机分成3组,每组15头。对照组饲喂不添加硒的基础饲粮,无机硒(SS)组饲喂基础饲粮+0.3 mg/kg亚硒酸钠,有机硒(SO)组饲喂基础饲粮+0.3 mg/kg蛋氨酸硒羟基类似物。试验期91 d,其中预试期7 d,正试期84 d。结果表明:1)饲粮中添加硒对奶牛的干物质采食量、产奶量及乳成分没有显著影响(P0.05)。2)与对照组相比,SO组血清总抗氧化能力和谷胱甘肽过氧化物酶活性显著升高(P0.05),血清丙二醛含量显著降低(P0.05),但SS组以上指标与对照组没有显著差异(P0.05)。3)各组中性洗涤纤维、酸性洗涤纤维和干物质的表观消化率差异不显著(P0.05)。与对照组相比,SO组有机物、粗蛋白质及粗脂肪的表观消化率显著提高(P0.05);SS组有机物和粗蛋白质的表观消化率提高,但差异不显著(P0.05)。综上所述,饲粮添加不同硒源对泌乳中期荷斯坦奶牛的生产性能没有影响,但与对照组相比,硒添加组的抗氧化性能和营养物质的表观消化率提高,而且SO组的效果明显优于SS组。
[Abstract]:The purpose of this study was to study the effects of different selenium sources on the performance, antioxidant activity and apparent digestibility of nutrients in Holstein cows during the middle lactation period. 45 healthy Chinese Holstein cows of similar lactation days were selected. The rats were randomly divided into 3 groups, 15 in each group. The control group was fed with basic diet without selenium, while the inorganic selenite group was fed with basic diet of 0.3 mg/kg sodium selenite. The experimental period was 91 days, of which the pretest period was 7 days, and the trial period was 84 days. The results showed that the dry matter intake of the dairy cattle fed with selenium added to the diet was 1: 1. Compared with the control group, the serum total antioxidant capacity and glutathione peroxidase activity in the so group were significantly higher than those in the control group (P 0.05), and the malondialdehyde content in the serum was significantly lower than that in the control group, but the above indexes in SS group were significantly lower than those in the control group. There was no significant difference in neutral detergent fiber in each group. The apparent digestibility of organic matter, crude protein and crude fat in acid detergent fiber and dry matter group was not significantly different from that in control group, and the apparent digestibility of organic matter, crude protein and crude fat in P0.05 / SS group was significantly higher than that in the control group, and the apparent digestibility of organic matter and crude protein in P0.05 / SS group was significantly higher than that in control group. But the difference was not significant (P 0.05). In conclusion, dietary selenium supplementation had no effect on the performance of Holstein cows in the middle lactation period, but compared with the control group, the antioxidant activity and apparent digestibility of nutrients were increased in selenium supplementation group. The effect of so group was better than that of SS group.
【作者单位】：中国农业科学院北京畜牧兽医研究所动物营养国家重点实验室;中国农业科学院与世界农用林业中心农用林业与可持续畜牧业联合实验室;湖南畜产品质量安全协同创新中心;中国饲料工业协会;北京中地种畜有限公司;
【基金】：“十二五”科技支撑计划(2012BAD12B02-5) 中国农业科学院科技创新工程(ASTIP-IAS07) 国家高层次人才特殊支持计划
【分类号】：S823.5

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