Maintenance of soil-fertility的意思|示意

It is concluded that the mixed stand can be able to be self-rich in soil fertility, which benefit the maintenance and improvement of site fertility under Chinese fir plantation.

表明杉木拟赤杨混交林具有良好的培肥土壤功能，对杉木人工林的地力维持和提高有重要意义。

Under the similar site condition, the secondary forest and the mixed plantations had greater water conservation function and better maintenance of soil fertility than the pure stands did.

在相同的立地条件下，天然次生林和混交林具有更好的维持地力作用和更高的水源涵养功能。

Function and value analysis of water conservation, soil reinforcement and fertility maintenance of urban forest in Guangzhou.

广州城市森林涵养水源、固土保肥的功能及价值分析。