...水土保持林 保土量 保土效率 灰色系统理论 [gap=636]Key words weathered granite; grey system theory; soil and water conservation forest; soil-fixing amount; soil-fixation efficien...
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?水土保持林地
soil and water conservation forest水土保持林地; 水土保持林; 水上保持林 收藏 soil and water conservation documents 水土保持文献 收藏 .
The results show that soilandwaterconservationforest gives its maximal benefit after definite age.
研究结果表明，水土保持林要达到一定的年龄才能发挥其最大的水保效益。
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The study on construction technology of soilandwaterconservationforest system in large project district in semi arid desertification grasslands has been done.
同时对在半干旱荒漠草地大型项目区水土保持林体系的建设技术做了研究。
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Disposition of soilandwaterconservationforest is a crucial problem to accelerate the recovery of vegetation and enhance soil and waterconservation efficiency on the Loess Plateau.