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(一)调好水质水质好坏对虾蟹品质影响很大,好的水质是提高虾蟹品质的基础,养殖池塘每隔1个月或20天就要用“药饵”和“药液”防治病虫害一次。池塘难免存在一些残留物质,且由于经过较长时间的养殖投饲,水质大多老化,因而在捕捞前1～2个月应彻底调节水质一次,主要是
(A) adjust the water quality of good or bad quality of shrimp and crabs have a great impact, good water quality is to improve the quality of shrimp and crabs, breeding pond every 1 month or 20 days, we must use “bait” and “medicine Liquid ”pest control once. Pond inevitably there is some residual material, and as a result of a longer period of feeding, most of the water quality aging, so 1 to 2 months before fishing should be thoroughly adjusted water quality, mainly