水土保持学报2017，Vol.31Issue(2)：129-136,8.DOI:10.13870/j.cnki.stbcxb.2017.02.023
干热河谷不同土地利用类型坡面土壤水分时空变异
Spatial and Temporal Variability of Soil Moisture on Sloping Lands of Different Land Use Types in a Dry-hot Valley
摘要
Abstract
In order to investigate the temporal and spatial variation of soil moisture in the dry-hot valley,a study was carried out in the demonstration area of soil and water conservation in the old town village of Yuanmou,taking the Leucaena leucocephala plantation,Twig grassland and sloping land as the research objects,by combining classical statistics and geostatistics analysis methods,the spatial and temporal variability of soil moisture on sloping lands of three land use types were studied.The results showed that:Soil water content in Yuanmou in the dry-hot valley was low (which was 7.56％ and 12.80％ in the dry and rainy season of forest land,8.05％ and 12.66 in the grassland,and 19.37％ and 22.95％ in the farmland,respectively),soil moisture in the rainy season was significantly higher than that in the dry season,and followed the order of sloping farmland＞grassland＞forest land in both the dry and rainy seasons,and showed moderate variation (between 0.14 to 0.72);the autocorrelation coefficients of soil water content in different layers of soil of different land use types all showed a positive to negative transformation trend,but the inflection point was different.The autocorrelation coefficients in the rainy season were higher than those in the dry season,the best fitting model for the forestland and grassland of soil moisture in the dry and rainy season were the same for different land use patterns (both the forest and grassland were spherical models during the rainy and dry season,and the farmland was the exponential model in the dry and rainy season),and all showed moderate or strong spatial correlation (between 0.05 and 0.39),which was greater in the dry season than in the rainy season.The spatial distribution patterns of soil moisture in different layers of soil of the same land type were similar in the dry season and rainy season,but the distribution patterns in the same layer of soil of different land use patterns were different.关键词
干热河谷/土壤水分/时空变异/土地利用类型/地统计学Key words
dry-hot valley/soil moisture/spatial and temporal variability/land use type/geostatistics分类
农业科技引用本文复制引用
韩姣姣,段旭,赵洋毅,熊好琴..干热河谷不同土地利用类型坡面土壤水分时空变异[J].水土保持学报,2017,31(2):129-136,8.基金项目
国家自然科学基金项目(31560233) （31560233）
云南省教育厅重点项目(2015Z141) （2015Z141）
云南省高校优势特色重点学科(生态学)建设项目(05000511311) （生态学）
