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五、蟹苗放养。在直播三叶期或秧苗移栽定植7—10天后,即可放养蟹苗。稻田在放蟹苗一周前,必须停止施用农药和化肥,并将稻田水排干、晾晒一天左右,以达消毒洁田之作用。然后放进新水,即可放苗。放养蟹苗要求大小规格一致,个体重30克以上的小蟹,每亩放养3000—3500只,若放蟹苗或幼蟹一般每亩可放1.5—3.5万只。放养时要注意均匀分散投入,避免稀密不均,造成局部蟹种过于集中而引起自相残杀,降低成活率。
Five, crab stocking. In the live clover stage or transplanted seedlings planted 7-10 days, you can stocking crabs. Rice crabs in a week ago, we must stop the application of pesticides and fertilizers, and water drained paddy, drying for about a day, in order to achieve the role of disinfection Jietian. Then into the new water, you can Fangmiao. Requirements of the size of stocking crabs the same size, the individual weighing more than 30 grams of small crabs, stocking 3000-3500 per acre, if the crabs or crabs generally put 1.5-3.5 million per mu. When stocking should pay attention to even decentralized investment, to avoid uneven density, resulting in local crabs too concentrated and cause cannibalization, lower survival rate.