【Key words】 sandy soil; soil phosphorus pool; soil phosphorus balance; soil phosphorus budget.
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土壤磷库变化 changes of soil phosphorus pool
As an important component of soil phosphorus pool,soil organic P has important effect on the soil fertility and plant nutrition,thus its role on plant has been paid more and more attention to.
作为土壤磷库的重要组成部分,土壤有机磷对土壤肥力和植物营养有着重要的影响,其对植物的作用愈来愈受到关注。
参考来源 - 长期施肥对潮土团聚体中磷及其组分的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
随着耗竭试验的继续，各处理土壤磷库含量都呈下降趋势。
Following with the exhaust test, the content of soil phosphorus storage of each treatment showed a declining tendency.
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。
Results showed that energy and materials input were mainly organic. There were surplus of nitrogen, phosphorus and potassium in the farmland soil pool.
有机质不仅直接丰富了高产农田的磷库，而且通过提高磷酸化酶的活性，降低土壤磷的吸附、固定，促进解吸，增加了土壤磷的有效性。
This is because that organic matter enriched not only phosphorous in the high yield soil, but also increased soil phosphorous availability through decreasing absorption and fixation.
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