摘要
以沂蒙山区的棕壤为例,选取典型土地利用桃园和玉米地,比较自然降雨前后两种土地利用土壤斥水性的变化特征,并分析其空间自相关性及其与理化性质之间的空间关系.结果显示:(1)两种土地利用均表现为强烈斥水性,降雨前后玉米地斥水性均强于桃园;降雨之后桃园斥水性显著降低,玉米地土壤仍表现为强烈斥水.(2)两种土地利用棕壤斥水性的空间分布特征具有明显差异,桃园斥水性表现出一定的空间集聚性,玉米地则为随机分布格局.(3)两种土地利用棕壤斥水性对有机质含量均无明显空间响应;桃园棕壤斥水性与含水量相关性为负,玉米地棕壤斥水性与含水量相关性为正,二者与含水量的空间相关均表现为雨后显著性增强;土壤砂粒、粉粒含量对降雨前后桃园棕壤斥水性皆有显著影响,雨后相关强度降低,黏粒对桃园斥水性的影响不大,土壤砂、粉、黏粒含量皆与玉米地雨前斥水性显著相关,雨后相关性相反,且仅有粉粒含量与斥水性显著相关.(4)桃园和玉米地棕壤斥水性的空间差异性主要受土壤质地和土地利用方式的影响,含水量则是引起降雨前后两种土地利用棕壤斥水性对理化性质空间响应显著不同的主要原因.
Taking the typical land use peach（Prunus persica） orchard and corn（Zea mays L.）field on brown soil from Yimeng mountainous area as a case study,the change characteristics of soil water repellency （SWR） before and after a rainfall event and its response to the soil physicochemical properties,such as soil moisture,soil organic content and soil texture,were explored.Further more,the SWR were analyzed using the spatial autocorrelation analysis and bivariate spatial correlation with the soil moisture,soil organic content and soil sand,silt,clay content.Results showed：（1） The actual SWR of both two land use types were strong and that of corn field were stronger.After the rainfall,the SWR of peach orchard decreased significantly while that of corn field was still strong water repellent.（2） There were obvious differences in spatial distribution characteristics of SWR between the two patches,that is,SWR of peach orchard presented spatial autocorrelation and that of corn field did random distribution.（3）Results of spatial correlation analysis showed that neither the SWR of two land use types has obvious correlation with soil organic content.The soil moisture presented negative spatial correlation with SWR of peach orchard and positive with that of corn field,both of them presented not obvious before the rainfall and significant after the rainfall.The soil sand and silt content presented significant spatial correlation with SWR of peach orchard both before and after the rainfall,and the degree of spatial correlation decreased after the rainfall.The soil clay content has no obvious effect on SWR of peach orchard.All the soil sand and silt and clay content presented significant spatial correlation with SWR of corn field before the rainfall and showed opposite correlation after the rainfall,with only the clay reach to significant correlation.（4） The spatial difference of the soil water repellency between peach orchard and corn field was mainly determined by soil texture and land use types,and the
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第6期80-87,共8页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(41101263)
临沂市科技发展计划引导项目(201112026)
山东省高等学校青年骨干教师国内访问学者项目(2013249)
关键词
斥水性
棕壤
桃园
玉米地
土壤质地
土壤含水量
soil water repellency
brown soil
peach orchard
corn field
soil texture
soil moisture
