上海市郊的家用沼气池,其主要用途是照明,而沼气池内的废弃物则作为农家肥料。若利用此种沼气肥来养鱼有不少好处:①成本低;②减少饵料用量;③不易污染水质;④肥效快:⑤操作方便;⑥肥源广;⑦产量高。利用沼气肥养鱼应注意以下几点:1.放养鱼类的品种必须对路:沼气肥施入水中,主要作用是肥沃水质,繁殖浮游生物,因此,放养的品种,应以滤食性鱼类(如花、白鲢)为主;适当搭放一些杂食性鱼类(如鲤、鲫鱼和罗非鱼等),充分利用沼气肥中的残渣,少放或不放吃食性鱼类(如青、草鱼等)。具体放养的标准,主体鱼:白鲢 The domestic digesters in the suburbs of Shanghai are mainly used for lighting, while the waste in the digesters is used as fertilizer for farmers. If you use this biogas fertilizer to fish have many benefits: ① low cost; ② reduce the amount of food; ③ not easy to pollute the water quality; ④ fertilizer efficiency: ⑤ easy to operate; ⑥ wide source of fertilizer; The use of biogas fertilizer fish should pay attention to the following points: 1. The stocking of fish species must be on the road: biogas fertilizer into the water, the main role is fertile water quality, breeding plankton, therefore, stocking varieties should be filter-feeding fish (Such as flowers, silver carp); proper placement of some omnivorous fish (such as carp, crucian carp and tilapia, etc.), make full use of the residue in biogas fertilizer, less or no eating fish (such as green, Grass carp, etc.). Specific stocking standards, the main fish: silver carp