Adding nicotinic acid had no effect on milk protein and milk fat percentage.
添加烟酸不影响乳蛋白含量和乳脂率。
There is an increasing tendency of milk protein percentage with higher dietary CP levels, but is insignificant.
乳蛋白随着CP水平增高有增加趋势，但差异不显著。
There is an increasing tendency of milk protein percentage with higher dietary CP levels, but is insignificant.
乳蛋白随着CP水平增高有增加趋势，但差异不显著。
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