蛋鸭笼养与平养产蛋性能测定

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在北方地区,冬季持续时间较长,且气候寒冷,蛋鸭采用地面平养的方式,由于难以调控舍内外的小气候条件,产蛋鸭一直处于不利环境的应激状态之中,影响了其生产潜力的有效发挥,严重时甚至停产.
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