一、猪—沼—菜1、应用“猪—沼—菜”模式产生的效应(1)经济效益明显。1个8m3的户用沼气池,年产沼气300m3,基本满足4～5口之家全年生活照明及燃料,年提供沼液15t,沼渣30m3,投资仅为2000元左右。农户每年可节省燃料费和电费250元～300元,减少化肥和农药使用量75%左右,节支200元～600元,利用沼液喂猪可节省饲料15%,施用沼肥蔬菜产量可提高25%左右,种养业可增效300元左右。1个沼气池一年可给农户带来直接经济收益在2000元以上,农户一年就可收 First, the pig - Marsh vegetables 1, the application of “pig - Marsh - vegetable” mode effect (1) obvious economic benefits. An 8m3 household digester, with an annual output of biogas 300m3, basically meet the family life of 4 to 5 home lighting and fuel, biogas slurry to provide 15t, biogas residue 30m3, investment is only about 2,000 yuan. Farmers can save fuel costs and electricity costs 250-300 yuan per year, reduce fertilizer and pesticide usage by about 75%, saving 200-600 yuan, the use of biogas slurry feed can save 15%, biogas vegetable yield can be increased About 25%, planting and breeding industry can increase about 300 yuan. A biogas digester can bring direct economic benefits to farmers a year in 2000 yuan or more, farmers can receive a year