To examine the effect of fatty acid calcium on the ration of lactating dairy cows.
目的为了验证脂肪酸钙在泌乳奶牛日粮中的作用。
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The effects of different diets on dry matter intakes( DMI)and digestion in lactating dairy cows were investigated.
本试验旨在研究在不同日粮条件下对奶牛干物质采食量（DMI）及养分消化率的影响。
The provision of undegradable protein(fishmeal or protected soya)to the diet of lactating dairy cows is not the best method to raise the protein content in milk and the milk yield.
给产奶牛补加过瘤胃蛋白质如鱼粉和保护的大豆饼粕对提高乳蛋白含量和乳产量并不是最好的方法。
Some proteins or the profile of a set of proteins present in the milk of lactating cows may be related to the pregnancy status of dairy cows.
牛奶中某些蛋白，或者全部蛋白谱图状态可能与奶牛妊娠阶段有关。
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