南方农业学报2017，Vol.48Issue(9)：1587-1593,7.DOI:10.3969/j.issn.2095-1191.2017.09.08
桂林喀斯特地区干湿循环过程中土壤水含量的空间变异
Spatial variation of soil water content under drying and wetting cycle in karst area of Guilin
摘要
Abstract
[Objective] In this study,spatial variation of soil water content under drying and wetting cycle in karst area of Guilin was investigated to provide theoretical reference for solutions to soil and water loss and crop drought resistance in the area.[Method] Three plots cultivated with soybean,pear trees and sugarcane were investigated to analyze the spatial variation of soil water content in upper soil layer(0-6 cm) under alternate drying and wetting conditions,and the variation of soil spatial distribution under different land use patterns was studied by geostatistical method.[Result] The difference in soil texture among the three plots was not significant(P＞0.05).Pear tree plot presented the lowest soil bulk density,but the greatest soil organic matter content and total porosity.The soil water content of these three plots during wet stage was nearly 2-3 times of the soil water content during dry stage.During the whole drying and wetting cycle,soil water contents of the three plots were pear tree plot＞sugarcane plot＞soybean plot.The proportion of spatial distribution of soil water content was 37.18％-95.99％,presenting a medium-high spatial correlation.It referred that the spatial distribution of plots was stable within a certain range.However,as different land use patterns resulted in certain variation,the variation intensity depended on tillage method or management mode.[Conclusion]The soil in karst area of Guilin has the capacity to maintain stability of spatial distribution in soil water content which can be weakened by human factors such as tillage method and irrigation to a certain extent.关键词
干湿循环/土壤水含量/地统计分析/空间稳定性/桂林喀斯特地区Key words
drying and wetting cycle/soil water content/geostatistical analysis/spatial stability/karst area of Guilin分类
农业科技引用本文复制引用
甘磊,郑思文,黄太庆,陈晓冰,包涵,程芳丽,陈廷速..桂林喀斯特地区干湿循环过程中土壤水含量的空间变异[J].南方农业学报,2017,48(9):1587-1593,7.基金项目
国家自然科学基金项目(41501230,31360356) （41501230,31360356）
广西自然科学基金项目(2016GXNSFAA380197) （2016GXNSFAA380197）
广西中青年教师基础能力提升项目(2017KY0270) （2017KY0270）
