During its long descent, this organicmatter 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。
2
Peat layer contains sand, containing not yet fully decomposed plant leaves, and a high content of organicmatter.
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。
3
Because of the organic-matterdecomposed 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) .