人工林中针叶树的枯落物占90%以上，而天然林中阔叶树的枯落物占40%。

The litters of coniferous trees accounted for 90% in artificial forests, but litters of broadleaf trees were 40% in natural forests.

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人工林中针叶树的枯落物占90%以上，而天然林中阔叶树的枯落物占40%。

The litters of coniferous trees accounted for 90% in artificial forests, but litters of broadleaf trees were 40% in natural forests.

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