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当前位置: 首页 > 文章 > 万安流域不同土地利用类型土壤全磷时空分异特征 土壤通报 2014,45 (4) 857-862
Position: Home > Articles > Spatial and Temporal Variations of Soil Total Phosphorus under Different Land Use Types in Wan'an Watershed Chinese Journal of Soil Science 2014,45 (4) 857-862

万安流域不同土地利用类型土壤全磷时空分异特征

作  者：
陈志超;杨小林;刘昌华
单  位：
河南理工大学测绘与国土信息工程学院;河南理工大学应急管理学院
关键词：
流域尺度;空间变异;时间变异;土地利用类型
摘  要：
以典型紫色土丘陵区万安小流域(12.10 km2)为研究区域,通过分析2011年4月(旱季)和8月(雨季)采集的552个表层土壤样品,采用传统统计学和地统计学的方法对小流域土壤全磷的时空变异特征进行了研究。结果表明:(1)流域不同土地利用类型土壤全磷含量均值介于0.42~0.73 g kg-1,土地利用类型之间全磷含量具有显著差异,呈现为水旱轮作田>旱地>林地;(2)相同土地利用类型旱季(4月)、雨季(8月)土壤全磷含量无显著差异;(3)水旱轮作田、旱地土壤全磷的中等空间相关性,表明其受到随机性因素和结构性因素的共同影响,而林地的强烈空间相关性表明其土壤全磷的空间分布特征主要受到结构性因素的作用;这表明在确认磷负荷风险地点、评估污染物迁移潜力及流域土壤资源管理时,应考虑不同土地利用类型条件下全磷时空特征。
译  名：
Spatial and Temporal Variations of Soil Total Phosphorus under Different Land Use Types in Wan'an Watershed
作  者：
CHEN Zhi chao;YANG Xiao-lin;LIU Chang-hua;School of Surveying and Land Information Engineering,Henan Polytechnic University;School of Emergency Management,Henan Polytechnic University;
关键词：
Watershed scale;;Spatial heterogeneities;;Temporal variation;;Land use type
摘  要：
The spatial and temporal variations of soil phosphorus under different land use types in a watershed(12.10km2)in the hilly area of central Sichuan Basin of China were investigated using conventional statistics, geostatistics and geographical information systems(GIS)to produce phosphorus distribution maps and to provide information for land management and control of environmental issues. Surface soil samples(0- 15 cm)from 276 sites within the watershed were collected separately in April and August, and analyzed for soil total phosphorus(STP). The spatial heterogeneities of STP under different land use types and the temporal variation of soil nutrients in dry season and rainy season were analyzed. The results showed that firstly the concentrations of STP were deeply influenced by land use types, and the means of STP content ranged from 0.42 g kg-1to 0.73 g kg-1. And the average STP contents under different land use types followed the order of paddy field > upland field > forest land. Secondly, No significant difference was observed on STP contents between April and August under same land use type. Thirdly, the spatial dependence of STP in the agricultural land was moderate, which mainly determined by random and intrinsic factors together. However, the strong spatial dependence of spatial distribution of STP in forest land was mostly explained by the intrinsic factors. We conclude that the obvious spatial and temporal patterns of phosphorus under different land use types must be considered in identifying sites which are at risk of P loading, and evaluate their potential to generate diffuse pollution.Taking land use into account is essential for land management and environmental restoration.

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