DESIGN: Complete randomized groups and controlled comparison.
设计：完全随机分组设计，对比观察。
The main results showed as follows: Trial one: 30-day age, 15 birds male small-fat-tail sheep according to body equal completely randomized design, were divided into 3 groups each with 5.
详细结果如下：试验一：采用随机分组对照试验设计，选用体重基本一致的30日龄小尾寒羊公羊15只，随机分成3个处理，每个处理5只。
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