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不同产奶量奶牛氮排泄对环境的影响 被引量:4

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摘要 为了解宁夏地区规模化养殖场奶牛氮排泄的状况,2011年9—11月对某典型养殖场奶牛日粮营养水平及粪便、尿液进行了调查研究,共采集到粪样、尿样各90个。结果显示:高产组奶牛粪氮的含量显著高于低产组(P<0.05),中产组与高产组、低产组都无显著差异(P>0.05);3组之间尿氮的含量差异不显著(P>0.05);高产组氮表观消化率极显著低于中产组和低产组(P<0.01)。结果表明:随着奶牛日粮中氮的饲喂量的增加,向环境中排泄的粪氮量也增大,并且氮表观消化率是下降的,牛尿向环境中的排氮量可能与奶牛尿液的总排量有关。
出处 《畜牧与兽医》 北大核心 2012年第12期44-46,共3页 Animal Husbandry & Veterinary Medicine
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共引文献36

同被引文献41

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