秋天,是养殖河蟹成熟和收获的季节,又是河蟹极易死亡的时期。有的养蟹户不注意加强饲养管理,引起河蟹大批死亡。预防河蟹死亡,应注意以下三个方面:1 自然死亡 俗话说:“西风起,蟹脚痒”。每年9～11月份,都有一批生长了两年的河蟹由“黄蟹”蜕壳成为“绿蟹”,性腺成熟,进入其生命的最 Autumn, is the breeding season of crab breeding and harvest, but also crabs easily died of period. Some crabs do not pay attention to raising management, causing a large number of crabs died. Prevention crab death, should pay attention to the following three aspects: 1 natural death As the saying goes: “westerly, crab itch.” From September to November every year, a group of crabs that have been growing for two years have been excreted by “yellow crabs” into “green crabs” and the gonads mature into the most part of their lives