【摘要】 采取空间代替时间的方法,研究了太行山退化山地不同林龄的火炬树群落物种多样性及土壤特性的变化,结果表明,(1)火炬树群落呈单优势群落,物种多样性指数和丰富度指数数值由草本层-灌木层-乔木层依次递减;随火炬树群落林龄增加,多样性指数下降,各样地多样性指数差异不大.(2)随火炬树群落林龄增长,土壤容重下降、孔隙度增加、水分含量增加,土壤物理性状得到改善,土壤渗透性、保水功能等能力得到提高;有机质、全氮及速效钾等养分指标含量逐渐增加,pH值下降,这些理化指标均呈线性变化.随火炬树林龄增长,土壤肥力有所提高,对研究区严重退化的生态环境起到良好的恢复效果.更多还原

【Abstract】 This experiment researched species diversity and soil property change of Rhus typhina community by applying the method of spatial sequence instead of time successional sequence in degraded hilly Taihang mountain.The results can be briefly stated as follows:(1)The community was dominated by Rhus typhina and the species diversity was in descending order in herb layer,shrub layer,and tree layer.The species diversity descended with the increase of plantation age and the varieties of diversity indices of Rhus typhina community were obvious. (2)The soil bulk density descended,and the total porosity,water content,soil permeability and water maintaining capacity increased with the increase of plantation age,which indicated that the soil physical properties became better with the development of Rhus typhina community.Furthermore,for soil chemical properties,the organic matter,total N and available K showed the same tendency of gradual increase,but pH value was converse.The soil physical and chemical properties were alignment change.The soil fertility was increased,and the degraded ecological environment was significantly improved with the increase of Rhus typhina plantation age.更多还原