Results showed that energy and materials input were mainly organic. There were surplus of nitrogen, phosphorus and potassium in the farmland soil pool.

结果表明：该农户生态系统能量和物质的投入均以有机为主，农田土壤库中氮、磷、钾均有盈余。

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Soil microbial biomass phosphorus, the relatively active fraction of soil organic phosphorus, was often considered as a labile pool of soil available phosphorus because of its short turnover time.

土壤微生物量中的磷是土壤有机磷最为活跃的部分，由于其周转快、极易矿化为植物有效磷而成为土壤有效磷的活性库。

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