【摘要】 研究表明，毛乌素沙区滩地护牧林树种的选择要因地制宜。不同类型林带的防护效益的回归分析模型为ｙ＝ａｘ２＋ｂｘ＋ｃ，模拟结果表明，复合型林带防护效果最好，改善草地植被效益显著。营造复合型护牧林应为疏透型，主林带间距１５０～２００ｍ，副林带间距２００～３００ｍ，带宽５～８ｍ，株距１～３ｍ，行数２～４行比较适宜。更多还原

【Abstract】 The study indicates that species selection of pasture land shelters in the lake beach of the Maowusu desert area must adopt their site quantity. The regression of protection effects of various types of forest belts is y=ax2+bx+c. It is concluded that the dimensional forestbelts have a better protection effects and apparent effects in improving the grassland regetation. Dimensional pasture land shelters should be penetrating types,whose distance between forest main belts should be 150-200m,distance between second forest belts are recomanded as 200-300m, the forest belt form 5-8m wide and row spacing 1￣3m, number of rows ranging from 2 to 4 are regarded suitable.更多还原