晋北丘陵风沙区不同植被恢复模式的土壤化学特征与生态恢复效应

通过对山西省右玉县从高家堡乡至右卫镇的公路两侧乔木林(小叶杨、樟子松、油松和华北落叶松)、灌木丛(沙棘、柠条和乌柳)及各种乔木、乔灌混交林的土壤化学特征分析,评价了乔、灌恢复模式的生态恢复效应。结果表明:(1)不同植被恢复模式的生态恢复效应差异显著,混交林生态恢复效果优于纯林;(2)灌木沙棘、柠条、乌柳在本区生态恢复中的作用突出,特别是豆科植物柠条的生态恢复效果优于其他非豆科植物;(3)乔木种樟子松、油松,灌木种沙棘、柠条、乌柳耐旱、耐寒,生态适应性强,在本区生态修复中作用明显,可用于本区人工植被恢复的植被重建优先物种;(4)本区土壤洁净,适宜发展有机农业。

Soil Chemical Characteristics and Ecological Restoration Effects of Different Revegetation Patterns in the Hilly Sandy of North Shanxi Province

We evaluated the ecological restoration effects of different revegetation patterns based on analyzing soil chemical characteristics of planted vegetation of arbor (Populus simonii,Pinus sylvestris mongolica,Pinus tabulaeformis and Larix principis-rupprechtii) and shrub species (Caragana korshinskii,Hippo phae rhamnoides and Salix cheilophila) distributing on the two sides of highway from Yuanbaozi to Youweizi regions of Youyu County in Shanxi Province.The results show that:(1) the ecological restoration effects of different revegetation patterns are significantly different,the ecological restoration effects of mixed forests are much better than those of the pure forests;(2) shrubs of Caragana korshinskii,Hippophae rhamnoides and Salix cheilophila play important roles in the process of ecological restoration in this area,especially leguminous species of Caragana korshinskii is better than that of non-leguminous species;(3) arbor (Pinus sylvestris mongolica and P inus tabulae f ormis) and shrub species (Caragana korshinskii,Hi ppophae rham noides and Salix cheilophila) with strong ecological adaptability of drought and cold resistance could be used as the priority species for future revegetation in this region;(4) the high soil quality is good for developing organic agriculture in this region.