Thus the key problem is how to meet varied economic objectives besides its fuel application of fuel forest on the basis of holding its soil conservation function.

因此，薪炭林在发挥水土保持功能的基础上，如何达到兼有薪用的多种经济目的是关键。

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Soil permeability is an important index of evaluating water source conservation function.

土壤入渗性能是评价土壤水源涵养功能的重要指标。

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But the big function of soil and water conservation and the improvement of soil texture and seedling nursing have not been studied systematically.

但对它强大的水土保育功能(抑制水土流失、改善土壤质地)，以及与水土保育相关联的幼苗保育功能等方面研究较少。

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