During its long descent, this organic matter may be eaten, excreted, and decomposed, drastically reducing its nutritive value.

在下降的过程中，这些有机物质可能会被吃掉、排出和分解，这样一来其营养价值就大大的降低了。

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Peat layer contains sand, containing not yet fully decomposed plant leaves, and a high content of organic matter.

泥炭层中含有泥沙，含有尚未完全腐烂的植物枝叶，有机物质含量极高。

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Because of the organic-matter decomposed by the pure stalk have not any soil to keep up, the relative content of organic-matter that can be distilled is the lowest(PS100) .

由于纯秸秆分解产生的腐殖物质，没有土壤来保持，其可提取腐殖物质的相对含量最低（PS100）。

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