各种治理措施效益由高到低的顺序依次是坡改梯、经济林果、水保林、封禁治理、人工种草和保土耕作。
The order of controlling benefits from high to low is terrace, economical forest-fruit, soil and water conservative forest, closed treatment, artificial grass planting and conservative tillage.
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。
The results show that soil and water conservation forest gives its maximal benefit after definite age.
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