运用层次分析法数学模型和欧式距离公式,对张掖市境内不同植被和立地条件样地的土壤、生境状况进行了研究,并对土壤、生境状况和植被恢复关系进行了评价。评价显示:植被恢复难度划分为4个等级,分别是易(0~0.424)、中等困难(0.425~0.56)、较难(0.57~0.774)、极难(0.775~1);张掖市植被重建与恢复过程中的主要限制因子为土壤水分、土壤砂粒含量;张掖市植被重建与恢复的难度与植被类型、土壤状况、生境状况有较好的对应关系。最后在植被恢复难度评价的基础上,针对不同难度地区提出了相应的植被恢复建议。
AHP and Euclidean distance were used to research the soil habitat conditions and site conditions under different vegetation types so as to assess the relationships between soil habitat conditions and vegetation regeneration in Zhangye City, Gansu Province. The results showed that, according to the vegetation regeneration difficulty index, the vegetation regeneration difficulty was divided into four levels, i.e. the level Ⅰ easy to regenerate vegetation (0-0.424), level Ⅱ with moderate difficult to regenerate vegetation (0.425-0.56), level Ⅲ with difficult to regenerate vegetation (0.57-0.774), and level Ⅳ with extreme difficult to regenerate vegetation (0.775-1). The factors restricting the vegetation regeneration in the city were mainly the soil moisture content and soil gravel content. The difficulties in regenerating vegetation were closely related to the vegetation types, soil conditions and habitat conditions. On the basis of the assessment, some suggestions were put forward for regenerating vegetation in Zhangye City based on the different difficulties.
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