植物获得的大部分磷是来自动植物残体的分解，换句话说是来自有机化合物。
Plants get most of their phosphorus from the decomposing remains of dead plants and animals — in other words, from organic compounds.
通过对玉米残体培肥后土壤水浸提液的研究可知，培肥后土壤有机质的含量增加。
The organic contents of fertilized soil increased by the research of soil water extract.
土壤有机质是微生物分解植物和动物残体的产物。
Soil organic matter is the product of microbial decomposition of plant and animal residues.
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