不同养殖规模下奶牛产奶量、氮素平衡与利用效率研究
马骁远1, 高志岭1, 高艳霞2, 谷秋莳1, 李建国2, 马文奇1
河北农业大学学报 ›› 2014, Vol. 37 ›› Issue (3) : 88-93.
不同养殖规模下奶牛产奶量、氮素平衡与利用效率研究
Milk production,nitrogen balance and utilization efficiency of lactating cows in dairy operations with different sizes
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