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3kg/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6kg/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3kg/d添加量提高到6kg/d有助于改善生鲜乳的营养品质。
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^O. 05）. While the cude protein and dry matter of fresh milk were sig- nificantly 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 di- et 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.
出处
《中国畜牧兽医》
CAS
北大核心
2017年第5期1393-1398,共6页
China Animal Husbandry & Veterinary Medicine
基金
农业部<2015年农产品质量安全监管(生鲜乳)项目>(J464)
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
domestic alfalfa
fresh milk
nutritional quality
milk protein
dry matter
fatty acid composition
