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以生物量和降低风速百分率等为指标，对毛乌素沙地各立地条件类型上不同结构防风固沙林进行了分析，为各立地类型选择了若干种优化的防风固沙林结构模式．
Taking biomass and wind speed decreasing percentage as indexes, the different structure windbreaks and sand-fixation forests on the site conditions in Mu Us sandy land were analyzed, and several optimized windbreak and sand-fixation forest structure patterns were selected for each site type.