水土保持研究2024，Vol.31Issue(4)：135-144,10.DOI:10.13869/j.cnki.rswc.2024.04.015
东北黑土区地埂坡耕地土壤物理性质的空间分布特征
Spatial Distribution Characteristics of Soil Physical Properties of Sloping Cultivated Land with Ridges in the Black Soil Region of Northeast China
摘要
Abstract
[Objective]The aims of this study are to reveal the difference of spatial distribution of soil physical properties with and without earth ridge,and to provide scientific basis for the evaluation of soil and water conservation measures and soil restoration effects on sloping cultivated land in the black soil region.[Methods]This study focused on the sloping cultivated land with soil and water conservation measures(ridges)in the northeast black soil region,with untreated sloping cultivated land as control.A spatially uniform sampling method was used to obtain the basic indicators of soil physical properties in the surface layer(0-15 cm),and the spatial distribution characteristics of soil water holding capacity and soil structure with and without ridge measures on sloping cultivated land were quantified.[Results](1)After the construction of ridges,the soil moisture content,saturated water holding capacity,field water holding capacity,and capillary water holding capacity increased by 7.89％,30.15％,17.83％,and 19.41％,respectively.(2)The soil water holding capacities of the ridge plots on the top,middle,and bottom of the slope were higher than those of the untreated control plots,and the soil water holding capacity gradually increased with the decrease of slope position.(3)After the construction of ridges,the bulk density and fractal dimension(D)of the soil decreased by 12.04％and 0.58％,respectively,while the total porosity,capillary porosity,WR＞0.25,mean weight diameter(MWD),and geometric mean diameter(GMD)increased by 14.02％,17.83％,17.74％,28.48％,and 21.31％,respectively.(4)The soil structures of the ridge plots on the top,middle,and bottom of the slope were better than those of the untreated control plots,especially on the top of the slope,which mainly affected the total porosity,MWD,GMD,and D;the middle and bottom of the slope mainly affected WR＞0.25,which increased by 18.5％and 17.89％compared to the untreated control plots.[Conclusion]The construction of soil and water conservation measures on sloping cultivated land can effectively improve soil water holding capacity and soil structure,and increase the content of stable aggregates,especially in the bottom of the slope.关键词
黑土区/地埂/空间变化特征/土壤持水能力/土壤结构特征Key words
black soil region/ridge/spatial variation characteristics/soil water holding capacity/soil structure characteristics分类
农业科技引用本文复制引用
魏思雨,张延玲,刘滨辉,付玉..东北黑土区地埂坡耕地土壤物理性质的空间分布特征[J].水土保持研究,2024,31(4):135-144,10.基金项目
"十四五"国家重点研发计划项目"黑土农田侵蚀阻控原理及水土保持措施效应"(2021YFD1500705) （2021YFD1500705）
