It improved the soil granular structure in a short time, since high molecular compounds naturally degraded into organic matters.

同时，高分子经过自然降解转化为有机物质，可在较短时间内改善土壤结构。

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Straw mulched could improve soil granular structure, and increase the content of water-stable aggregates, so the ability of permeability, fertilizer and water conservation got improved.

秸秆覆盖还田促进土壤团粒结构形成，提高了土壤水稳性团聚体含量，从而改善了土壤通透性和保水保肥性。

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