【摘要】 简要论述了增加高产奶牛个体在牛群中比例的必要性、粗饲料的数量和质量对高产奶牛生产性能的瓶颈作用。更多还原

【Abstract】 The necessity of increasing the ratio of high-productive cows in the herd of cattle was briefly discussed in the paper. The bottle-neck effect of the quality and quantity of coarse feed to productivity of high-productive cow was also discussed.更多还原