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夏天天气炎热,水温较高,河蟹养殖一定要加强管理,精心饲养,保证河蟹安全渡夏,提高成活率,对此,必须做好以下几项工作。一、要有足量的水草供应。 夏季蟹池内应放养些水花生、浮萍之类的水生植物,或者预先种植一些芦苇、茭白等挺水植物、有条件的地方可用砖、瓦等堆叠人工蟹巢,为河蟹提供阴凉的栖息环境。另外,蟹池中要保持有大量的轮叶黑藻、节节草等幼嫩的水草供应,以便河蟹摄食和躲避敌害。用于遮荫的水草不能将整个池面都覆盖起来,应留有池面的1/3左右的活动空间。长期污烂的水草应立即捞除,以免败坏水质,滋生病菌。
Summer hot weather, high water temperature, crab farming must be strengthened management, well-fed, to ensure that crabs safely crossing the summer, to improve the survival rate, which, we must do the following several work. First, there should be sufficient supply of aquatic plants. Crab ponds should be stocked in summer, some peanuts, duckweed and the like aquatic plants, or pre-planting some reeds, prickly ash and other emergent plants, where conditions can be brick, tile and other artificial crab nest stacking, providing a crab for the crabs to provide a cool habitat . In addition, the crab pool to maintain a large number of leaf hydrophytes, nodular grass and other young plants supply, in order to eat crabs and dodge predators. Aquatic plants used for shading can not cover the entire pool surface, and should leave about 1/3 of the pool surface activity space. Long-term contamination of aquatic plants should be immediately removed, so as not to corrupt the water quality, breeding bacteria.