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罗非鱼不耐低温,秋末冬初,当水温降至15℃时,需及时干池起捕上市,这样罗非鱼养殖池实际只利用半年。近年来,我镇有不少精明的虾农,利用罗非鱼池速养青虾,9月上、中旬下塘,青虾在越冬前有2个月左右的生长期,只需蜕皮3次就能长成大虾,产量可达30～50千克/667米~2,成虾规格大,且赶在元旦、春节前后上市,市场价格高,每667米~2纯收益可达1 000～1 500元/667米~2。现将具体做法介绍如下。
Tilapia not cold, late autumn and early winter, when the water temperature dropped to 15 ℃, timely dry pool catch market, so tilapia ponds actually use only six months. In recent years, I town shrewd shrimp farmers, the use of fast tilapia tilapia pool, in September, the middle of the next pond, freshwater shrimp in the winter before the 2-month period of growth, just the molting 3 times Can grow into prawns, the output of up to 30 to 50 kg / 667 m ~ 2, shrimp specifications, and in time for the New Year’s Day, before and after the Spring Festival listing, the market price is high, every 667 meters ~ 2 net income up to 1 000 ~ 1 500 yuan / 667 meters ~ 2. Specific practices are introduced below.