下辽河平原区农田土壤有机碳含量时空变异研究
Study of Temporal and Spatial Variation for Soil Organic Carbon in Croplands in Lower reaches of Liaohe river plain
宋丹 1李双异 2汪景宽2
作者信息
- 1. 沈阳农业大学土地与环境学院,辽宁沈阳110866;辽宁省土壤肥料总站,辽宁沈阳110034
- 2. 沈阳农业大学土地与环境学院,辽宁沈阳110866
- 折叠
摘要
以1980年第二次土壤普查数据和2010年下辽河平原区耕地地力评价数据为基础,采用GIS空间分析的方法,对该地区耕地土壤有机碳的含量随时间和空间的变化特征进行分析和研究.分析结果表明,上世纪80年代,下辽河平原耕地土壤有机碳分布的差异越来越小,该地区耕地土壤中有机碳的整体呈减少的趋势.农田土壤有机碳含量空间分布总体而言呈现东高西低、南高北低的趋势.从土壤有机碳含量空间分布的变化看,下辽河平原区农田土壤有机碳含量呈南部增加、北部降低的趋势.30年来,在人类活动的干预下,土壤有机碳含量分布相同的趋势在慢慢减小,小范围内的变化非常明显并且变化幅度较大,整个地区的含量分布变得错综复杂.
Abstract
A field experiment was conducted to analyze the temporal and spatial variation for Soil organic carbon in croplands in Liaohe plain as the basis of the data for the second soil census in 1980 and fertility evaluation of cultivated land in 2010,using spatial analysis method.The results show that,since 1980,it appears generally "aggregation of carbon " trend in Liaohe plain cropland Soil,spatial distribution difference decreased gradually.Spatial distribution of cropland soil organic carbon content in general appears high in the east and low in the west,high in the south and low in the north.From the change of the spatial distribution of soil organic carbon contents,it appears increases in south and reduces in north in Liao downriver plain.More than 30 years,in the activity of human intervention,the uniformity of the soil organic carbon content distribution is abate.Variation trend is strengthened in a small range.The overall distribution inclines to complex.
关键词
下辽河平原区/农田/土壤有机碳/空间变异Key words
Lower reaches of Liaohe river plain/Cropland/Soil organic carbon/Temporal and spatial variation引用本文复制引用
出版年
2014
NETL
NSTL
维普
万方数据