【摘要】 本文通过对比试验的方法,定量地研究了影响河蟹早熟的5种因子,通过控制5种因子,使河蟹性早熟的比例控制在10％以内,取得了较理想的经济效益,同时,分析探讨了影响河蟹性早熟的内、外因子。更多还原

【Abstract】 The 5 factors controlling and effecting sexual early-maturing of river crabs were quantatively studied by contrast experiments in this paper, which made the ratio of sexual early-maturing crabs beyond 10% by controlling the 5 factors, and got the better economic benefits. Meanwhile, the inner and outer factors effecting sexual early-maturing of river crabs were analysed and discussed in the paper.更多还原