• The milk and growth performance of low production Holstein herd had been improved after crossbreeding for 17 years and the rotational mating patterns made better improvement.

    经过杂交原中低产荷斯坦牛群体性能生长性能方面进展,轮回杂交提高幅度相对略高。

    lib.cqvip.com

  • The milk and growth performance of low production Holstein herd had been improved after crossbreeding for 17 years and the rotational mating patterns made better improvement.

    经过杂交原中低产荷斯坦牛群体性能生长性能方面进展,轮回杂交提高幅度相对略高。

    lib.cqvip.com

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