用材林、经济林、薪炭林的林地使用权；
The woodland use right for timber stands, economic forests and firewood forests;
在没有薪炭林的海口市，薪柴主要来源于防护林和用材林。
As there is no fuelwood forest in Haikou city, the firewood is collected chiefly from the protective forest and timber forest.
结果表明：不同农户之间薪炭林物种丰富度和农业物种丰富度指数差异较大。
The results show that there are great discrepancies of plant species richness among different households.
本研究表明，即使全部荒山都营造成薪炭林，也只能解决全年所需燃料的25.8%。
The study indicated that even if all the barren hillsides were planted with firewood, they could supply only 25.8 percent of fuel needed. N a whole year.
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。
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。
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.
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