用沼液、沼渣稻田养鱼,与一般稻田养鱼相比,每亩可增产水稻3%、鱼18%,节约碳氨25公斤,亩稻田可节本增效200～300元,经济效益显著。(一)稻田整理养鱼稻田的建设有三种形式。(1)传统式:插秧前,在田中每隔4～5米挖深为0.25米、宽为0.3米的井字形鱼沟。田梗加高至0.4米以上。鱼沟交 With biogas slurry and biogas residue in paddy field, fish can be increased by 3% per mu, 18% of fish, 25 kg of carbon, saving 200-300 yuan per mu of paddy field, with economic benefits Significant. (A) Paddy field finishing fish farming in three forms. (1) Traditional: Before transplanting, in the Tanaka every 4 to 5 meters depth of 0.25 meters wide, 0.3 meters wide well-shaped fish ditch. Field stems increased to 0.4 meters above. Fish ditch pay