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冬季来临,当水温降到10℃以下时,河蟹就很少摄食或不摄食,蜇伏在池埂或池底洞穴中,处于休眠状态或半休眠状态,很少活动。为了使河蟹能够安全越冬,除了改善河蟹越冬的池塘环境外,还有必要加强河蟹越冬管理和制订提高河蟹越冬成活率的措施。一、狠抓河蟹越冬前的饲养工作。在三个月左右的漫长冬季,河蟹往往抵抗不了冷冻和病害的侵袭而死亡。因此,必须狠抓河蟹越冬前的饲养,适当增加含脂肪、蛋白质高的动物性饲料,喂饱喂好,
Winter comes, when the water temperature dropped below 10 ℃, the crabs rarely eat or not food, sting in the pond or bottom of the cave, in a dormant state or semi-dormant state, little activity. In order to make crabs can be safe winter, in addition to improving the crab overwintering pond environment, there is also necessary to strengthen the management of crab overwintering and to develop measures to improve the survival rate of crab overwintering. First, pay close attention to the breeding of crab before winter. In the long winter of about three months, crabs often die of freezing and disease. Therefore, we must pay close attention to the crab overwintering breeding, appropriate increase in fat, high protein animal feed, feed well fed,