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低覆盖度行带式固沙林具有显著的防风固沙效果,已经在我国的半干旱地区广泛推广。针对内蒙古自治区呼和浩特市和林格尔县不同配置的柠条锦鸡儿人工林,进一步研究不同带间宽度带内植被自然恢复过程及物种多样性的差异,结果表明:(1)在覆盖度为20%左右时,合理的行带式格局分布的柠条锦鸡儿人工林带间植被的恢复效果优于随机分布格局的样地。(2)柠条行带式造林不宜太窄和盖度太大,会影响其林下物种丰富度。(3)宽的带间距带内物种丰富度与物种多样性和均匀度以及其生物量变化曲线呈现了两个高峰,出现在距柠条带6-8m左右,而窄的带间距带内只有一个高峰。因此,该地区柠条带宽度为12m-16m可以使其带内的草本物种多样性和生物量达到最大。
Low coverage of belt-type sand fixation forest has a significant effect of windbreak and sand fixation, has been widely promoted in semi-arid areas of our country. According to the different configurations of Caragana korshinskii plantation in Hohhot and Ringling counties of Inner Mongolia Autonomous Region, the differences of natural recovery processes and species diversity in different widths of different bands were further studied. The results showed that: (1) %, The recovery effect of artificial Caragana korshinskii plantation with reasonable line-and-strip pattern was better than that of random distribution pattern. (2) Caragana line belt afforestation should not be too narrow and the cover is too large, will affect the species richness under the forest. (3) Broad band spacing Species richness, species diversity and evenness, and their biomass curve showed two peaks that appeared about 6-8 m away from the citrus band, whereas the narrow bands had only A peak. Therefore, the width of the citrus strip in this area is 12 m-16 m, which maximizes the species diversity and biomass of the herbaceous plants in the zone.