干旱地区农业研究2013，Vol.31Issue(3)：194-199,243,7.
黄河三角洲农田灌溉前后土壤盐分时空变异特征研究
Spatial-temporal variability of soil salt content before and after irrigation in the Yellow River Delta
摘要
Abstract
In attempt to study spatial and temporal variability of soil salt content before and after irrigation,the descriptive statistics and geostatistics were used to quantitatively analyze soil salt content of field-scale in vertical and horizontal directions in the Yellow River Delta.The result showed that soil salt content was gathered in 0 ～ 10 cm layer and 40 ～ 60 cm layer before the irrigation,and gathered in 40 ～ 60 cm layer after the irrigation.Irrigation reduced salinity of 0 ～ 10 cm and 10 ～ 20 cm soil layer and gained better desalination.Except soil salt content of 0 ～ 10 cm layer had a weak spatial correlation after irrigation,all other layers of soil showed a strong spatial correlation.Compared salt content of soil before irrigation with after irrigation,salt content of 40 ～ 60 cm layer was significantly reduced after irrigation,soil salinity contour intensity was weakened,and spatial distribution trend clearly turned to fiat.Before irrigation,high soil salinities of all soil layers were detected in the northern part of the study area,while low soil salinities were detected in the northwest corner; After irrigation,except high soil salinity of 0 ～ 10 cm layer was detected in north-central area,high soil salinities of the rest layers(10 ～ 20 cm,20 ～ 40 cm and 40 ～ 60 cm) were discovered in south-central or central area.Low soil salinity of each layer of soil showed same distribution pattern,and they were mostly observed in the northern part of the experimental field.关键词
土壤含盐量/灌溉/时空变异特征/半方差函数/田块尺度/盐碱地Key words
soil salt/ irrigation/ spatial-temporal variability/ semi-variance/ field scale/ saline-alkali soil分类
农业科技引用本文复制引用
吴向东,陈小兵,吕真真,郭建青,于君宝..黄河三角洲农田灌溉前后土壤盐分时空变异特征研究[J].干旱地区农业研究,2013,31(3):194-199,243,7.基金项目
公益性行业(农业)科研专项经费项目(200903001) （农业）
黄河三角洲生态环境重点实验室(2008KFJJ03) （2008KFJJ03）
海洋公益性行业科研专项(201105020) （201105020）
国家科技支撑计划项目(2009BADA3B04) （2009BADA3B04）
