先锋植物小果博落回对土壤理化性质的影响

目的]为土地复垦和生态修复提供理论参考。方法]对中条山浍河河谷区小果博落回生物群落进行野外调查,并对其土壤理化性质进行测定。结果]小果博落回植株养分累积量高于其他植物,且呈现出P﹥N﹥K的趋势。小果博落回对不同深度的土壤理化性质都有不同程度的提高,总体表现为对表层土壤（0～20 cm）的含水量、土壤机械组成、pH及有机质、全氮、有效磷含量的提高效果显著高于深层土壤（20～40 cm）,而对速效钾含量的提高作用则表现为深层土壤大于表层土壤。结论]先锋植物小果博落回有助于改良不同深度土层的土壤含水量及有机质、全氮、有效磷、速效钾含量等理化性质,有利于提高土壤肥力,进而为其他植物群落的生长提供基础条件,为植物群落的恢复与重建奠定基础。

Effect of Pioneer Plant Macleaya microcarpa on the Physicochemical Properties of Soil

Objective] To provide theoretical reference for land reclamation and ecological restoration.Method] The pioneer plant Macleaya microcarpa community in Huihe River valley of Zhongtiao Mountain was investigated to study the impact of Macleaya microcarpa on soil physical and chemical properties.Result] The nutrient accumulation of Macleaya microcarpa was higher than that of other plants and presented P﹥N﹥K trend.Macleaya microcarpa improved the physicochemical properties of soil at different depths to different extent,the improvement of water content,soil physical components,organic matter,pH,TN and available P was higher in surface soil(0-20 cm) than in deep soil(20-40 cm),while the improvement of available K was higher in the deep soil than in the surface soil.Conclusion] The pioneer plant Macleaya microcarpa improved the physicochemical properties of soil such as soil water content,organic matter content,TN,available P and available K and so on,and increased the soil fertility,therefore providing basic conditions for the growth and restoration of other plant communities.