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土壤中含有各种形态的氮,其中有有机态氮和速效性氮(氨态氮和硝态氮)。有机态氮,必须经过微生物作用分解矿物质化后,才能被作物所利
Soil contains various forms of nitrogen, including organic nitrogen and available nitrogen (ammonia nitrogen and nitrate nitrogen). Organic nitrogen, must be decomposed after the role of microbial mineralization, the crop can be beneficial