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以高、低肥力的棕壤、黑土为试材,加入玉米秸、猪粪等有机物(肥)料和氮磷化肥,采用Stanford好气培养淋洗法处理14周。结果表明:单加玉米秸,不仅不释放土壤矿化氮,反而消耗土壤原有矿化的氮素,其中高肥土壤中玉米秸可矿化出部分氮素,低肥土壤则否;高肥土壤加入氮化肥调整之后,可使玉米秸释出其全氮量的16～31％,低肥土壤释放氮量极少;单施猪粪,不论任何土壤均能释放矿化氮素,猪粪加化肥氮调整后,化肥氮被同化,高肥土壤中不释氮,低肥土则释氮;猪粪加化肥磷后有促进其释氮作用。
High and low fertility of brown soil and black soil were used as test materials, organic matter (fertilizers) such as corn stalks and pig manure and nitrogen and phosphorus fertilizers were added and treated with Stanford aerobic culture leaching for 14 weeks. The results showed that corn stalk alone not only did not release mineralized nitrogen but depleted the original mineralized nitrogen in the soil, but corn stalks could mineralize some nitrogen and low-fat soils in high-fat soils. After the soil was added with nitrogen fertilizer, corn straw could release 16-31% of its total nitrogen content, and the content of nitrogen released by low-fat soil was very small. When pig manure was applied alone, no matter the soil could release mineralized nitrogen and pig manure After adjustment of fertilizers and nitrogen, chemical nitrogen was assimilated, nitrogen was not released from high fertilizers, nitrogen was released from low fertilizers, and nitrogen was released from pig manure plus fertilizers.