太行山石灰岩山地基于微地形植物群落及土壤特征的植被恢复技术研究

Vegetation Restoration Technology Study Based on Plant Community and Soil Characteristics of Microtopography in The Limestone Mountain Area of Taihang Mountain

将山西太行山石灰岩山地划分为10种微地形类型,对不同微地形的植物群落特征、土壤特征和适宜的植被恢复模式进行研究。结果表明,径流汇集洼植被的平均高、盖度和单位面积生物量最高,坡顶和坡顶裸岩的较低;径流汇集洼表层土壤的氮、磷、钾含量较高,坡顶裸岩的较低;径流汇集洼的土壤厚度大于30 cm,坡顶、坡顶裸岩和石缝的土壤厚度小于5 cm。由此提出了两大类植被恢复模式,可为太行山石灰岩山地的植被恢复提供科学依据。

The limestone mountain area of Taihang Mountain in Shanxi Province was divided into 10 types of microtopography,the plant community characteristics,soil characteristics and suitable vegetation restoration models of different microtopography were studied.The results showed that the average height,coverage and biomass per unit area of vegetation in the runoff convergence depression were the highest,while that in bare rocks on the slope top and slope top were lower.The content of nitrogen,phosphorus and potassium in the surface soil of the runoff convergence depression was higher,while that in bare rock on the slope top was lower.The soil thickness of the runoff convergence depression was larger than 30 cm,while the soil thickness of the slope top,bare rock and stone crevices was less than 5 cm.Based on this,two types of vegetation restoration models had been proposed which could provide scientific basis for vegetation restoration in the limestone mountainous areas of the Taihang Mountains.