brood hen是什么意思

用法例句

It was studied that Red Swamp Crawfish growing and laying eggs fed with different forage prescrip-tion.

研究了不同饵料配比条件下克氏原螯虾生长和抱卵的情况。

The body weight(excluding the egg weight in the abdomen),carapace width,carapace length,egg production/ind.

系统研究和比较池塘养殖和野生三疣梭子蟹人工繁殖亲本的体重、甲壳长、甲壳宽、抱卵量、生殖力和单个卵重等指标,结果表明:1。

Effects of different diets on reproductive performance and HUFA composition of Chinese mitten crab (Eriocheir sinensis) broodstock during second spawning;

不同饵料对二次抱卵期间中华绒螯蟹生殖性能和HUFA组成的影响(英文)

The egg mass rate, megalopa yield, growing rate and the survival rate of the young Chinese mitten crab are promoted significantly while proper ratio ground water is applied to the cultivation.

通过适量地下水在育苗中的使用 ,使蟹苗在抱卵率、大眼幼体产量、生长速度及成活率等技术指标上有明显提高 ,这对中华绒螯蟹育苗研究和指导养殖有重要意义。