有机肥包括除化肥以外一切可做肥料的物质,通常以人畜粪尿、作物秸秆、绿肥为主。有机肥养分全面,肥效持久均衡,既能改善土壤结构,培肥改土,促进土壤养分的释放,又能供应作物养分,特别是对发展有机农业、绿色农业和无公害农业有着重要意义。但有机肥种类很多, Organic fertilizers include everything except fertilizers that can be used as fertilizers, usually human and animal excrement, crop straws, and green manures. The comprehensive and effective organic fertilizer has long-lasting and balanced fertilizer effect, which can not only improve the soil structure, fertilize and soil, promote the release of soil nutrients, but also supply crop nutrients, especially for the development of organic agriculture, green agriculture and pollution-free agriculture. However, many types of organic fertilizer,