《中国畜牧兽医》 ›› 2017, Vol. 44 ›› Issue (5): 1393-1398.doi: 10.16431/j.cnki.1671-7236.2017.05.020

• 动物营养与饲料科学 • 上一篇    下一篇

国产苜蓿添加量对当地生鲜乳营养品质的影响研究

仇菊1, 刘鹏1, 梁克红1, 韩娟1, 秦玉昌1,2   

  1. 1. 农业部食物与营养发展研究所, 北京 100081;
    2. 中国农业科学院北京畜牧兽医研究所, 北京 100193
  • 收稿日期:2016-10-12 出版日期:2017-05-20 发布日期:2017-05-18
  • 通讯作者: 秦玉昌 E-mail:qinyuchang@caas.cn
  • 作者简介:仇菊(1984-),女,北京人,博士,助理研究员,研究方向:食物营养及乳品质量评价,E-mail:qiuju@caas.cn
  • 基金资助:

    农业部《2015年农产品质量安全监管(生鲜乳)项目》(J464)

Effect of Different Domestic Alfalfa Adding Content on Nutritional Quality of Local Fresh Milk

QIU Ju1, LIU Peng1, LIANG Ke-hong1, HAN Juan1, QIN Yu-chang1,2   

  1. 1. Institute of Food and Nutrition Development, Ministry of Agriculture, Beijing 100081, China;
    2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
  • Received:2016-10-12 Online:2017-05-20 Published:2017-05-18

摘要:

国产苜蓿供应当地的奶牛养殖场具有明显的价格优势,但是目前合理且切实可行的苜蓿添加量及其对生鲜乳营养品质的影响仍缺乏科学的研究。本试验以黑龙江省大庆市种植的苜蓿为原料,在当地9个规模化奶牛养殖场开展了为期一年的苜蓿饲喂试验,分析苜蓿不同添加量对生鲜乳品质的影响。结果显示,与未添加苜蓿的养殖场相比,添加3 kg/d国产苜蓿不能显著改善生鲜乳中的营养成分(P>0.05)。当日粮中苜蓿添加量达到6 kg/d时,生鲜乳中粗蛋白质(CP)及干物质(DM)含量显著提高(P<0.05),但对脂肪及乳糖含量无显著影响(P>0.05)。且能够显著增加不饱和脂肪酸的含量(P<0.05),改善生鲜乳的脂肪酸组成。说明将各养殖场目前常采用的3 kg/d添加量提高到6 kg/d有助于改善生鲜乳的营养品质。

关键词: 国产苜蓿; 生鲜乳; 营养品质; 乳蛋白; 干物质; 脂肪酸组成

Abstract:

Domestic alfalfa supply has the obvious price advantage in the local dairy farms,but its feasible amount of feeding and the effect on the quality of fresh milk are still unclear for a lack of scientific experimental evidence. The alfalfa growed in Daqing city, Heilongjiang province was used in the present study,and one-year feeding experiment was performed to analyze the effect of alfalfa on the quality of fresh milk in the local 9 large-scale dairy farms. The results showed that compared with control group,the nutrient of fresh milk were not significantly improred when the amout of alfalfa was 3 kg/d (P >0.05).While the cude protein and dry matter of fresh milk were significantly increased (P <0.05) when the amount of alfalfa addition in the diet was 6 kg/d, but the milk fat and lactose percentage were not significantly affected (P <0.05). Moreover,the alfalfa addition in diet resulted in a significantly increase of unsaturated fatty acid percentage (P <0.05) and optimization of fatty acid composition of the fresh milk. In conclusion,it was helpful to improve the nutritional quality of fresh milk by changing the alfalfa amount of 3 kg/d,which was commonly used at present in dairy farms,to be 6 kg/d.

Key words: domestic alfalfa; fresh milk; nutritional quality; milk protein; dry matter; fatty acid composition

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