有机农业又名生态农业,即以有机肥为主的农业。我国就是一个典型的以有机肥为主的4态农业。我国的十六亿亩耕地,如按亩产五百斤需用有机肥5000斤计算,共需有机肥八万亿斤。1980年全国氮化肥产量999万吨,按含氮量折算大约相当于8000亿斤有机肥,正好是总需肥量的十分之一。所以,百分之九十(72000亿斤)要靠有机肥。据联合国粮农组织统计,1976年我国使用有机肥 Organic agriculture, also known as ecological agriculture, organic farming-based agriculture. Our country is a typical 4-state agriculture based on organic fertilizer. China’s 1.6 billion mu of arable land, such as mu kilograms per mu required to use organic fertilizer 5000 kg, a total of eight trillion pounds of organic fertilizer required. In 1980, the national output of nitrogenous fertilizer was 9,900,000 tons, equivalent to about 800 billion kilograms of organic fertilizer, equivalent to one tenth of the total required amount of fertilizer. Therefore, ninety percent (7.2 trillion kilos) rely on organic fertilizer. According to the UN Food and Agriculture Organization, in 1976, China used organic fertilizer