The fine-roots of Betula platyphylla forest have quick decomposition rate, so it plays an important role in soil nutrient return.
白桦林细根分解较快，在土壤养分归还方面能发挥重要作用。
The nutrient return of the litters was closely related to the nutrient contents of the litters. The litter C/N ratio and P content could be the key indices for the litter decomposition.
竹林凋落叶的养分含量对凋落物养分归还有重要影响，尤其是C/N和P可能作为竹林凋落物分解的指示者。
It becomes obvious that nutrient inputs significantly influence the rates of economic return in upland cropping systems.
显而易见，养分投入显著影响旱地种植制度下的经济收入。
It becomes obvious that nutrient inputs significantly influence the rates of economic return in upland cropping systems.
显而易见，养分投入显著影响旱地种植制度下的经济收入。
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