【作者】 李生； 任华东； 姚小华； 张守攻；

【Author】 Li Sheng1,Ren Huadong1,Yao Xiaohua1,Zhang Shougong2(1 Research Institute of Subtropical Forestry,CAF;Key laboratory of subtropical tree breeding and cultivation,state forestry administration,Zhejiang Fuyang 311400,China.2 Chinese Academy of Forestry,Beijing 100091,China.)

【机构】 中国林业科学研究院亚热带林业研究所,国家林业局亚热带林木培育重点开放性实验室； 中国林业科学研究院；

【摘要】 在广西自治区凌云县典型喀斯特石漠化地区,针对农田、退耕台地、退耕坡地、草地、灌木林地、针叶林地、阔叶林地等7种不同土地利用方式的土壤理化性质进行调查分析,结果表明,不同土地利用方式对土壤物理化学性质存在着显著影响。不同利用方式样地土壤容重、土壤含水量、总孔隙度、毛管孔隙度、非毛管孔隙度存在极显著的差异(p<0.01)。有机质、全氮、全磷、全钾、速效氮、速效磷、速效钾及交换性Ca2+含量差异极显著(p<0.01)。运用相对退化指数方法对不同利用方式的土壤定量分析表明,相对阔叶林地土壤,灌木林、针叶林、退耕台地、草地、退耕坡地、农田土壤的退化程度依次增加,其相对退化指数分别为-25.3%、-56.3%、-56.6%、-56.7%、-62.2%、-68.4%。多层综合评估结果表明农田土壤质量为最低,针叶林地、草地、退耕坡地、退耕台地土壤质量为中等,灌木林地与阔叶林地土壤质量较高。人类对土壤的干扰是影响土壤质量变化的主导因素,干扰强度大,土壤质量退化严重。更多还原

【Abstract】 The physical and chemical properties of different soil of land used in the typical Karst rock desertification area in Lingyun city,Guangxi Zhuang Autonomous Region,were analyzed.The samples included 7 types,such as farmland(FL),retired terrace farmland(RTL),retired sloping land(RSL),grassland(GL),shrubland(SL),coniferous forest land(CFL),broadleaf forest land(BFL).The physical properties indices were bulk weight(BW),water content(WC),total porosity(TP),capillary porosity(CP),non-capillary porosity(NCP).And the chemical property indices consisted of pH,organic matter(OM),total N,total P,total K,dissoluble N(DN),dissoluble P(DP),dissoluble K(DK),Exchangeable Ca2+(EC).The results show that land use had significantly effect on the soil physical and chemical properties.The difference between BW,WC,TP,CP and NCP of 7 types land use soil was distinct(p<0.01).The difference of OM,total N,total P,total K,DN,DP,DK and EC of 7 types land use soil was distinct(p<0.01),too.Relative soil quality indexes method was used to evaluated the soil quality,compared to the BFL soil,the relative soil degenerate indexes of SL,CFL,RTL,GL,RSL,FL respectively were-25.3%、-56.3%、-56.6%、-56.7%、-62.2%、-68.4%.Fuzzy multidimensional comprehensive evaluation’s result show that the soil quality of FL was the worst,CFL,GL,RSL and RTL were middle,and the SL and BFL were higher.Human disturbances directly infect the quality of the soil,and it’s degenerated degrees arose with disturbance intensity.更多还原