森林工程2026，Vol.42Issue(1)：23-34,12.DOI:10.7525/j.issn.1006-8023.2026.01.003
黑土区水土保持工程措施对坡耕地土壤生产力的空间分异效应及驱动机制
Spatial Differentiation Effect and Driving Mechanism of Soil and Water Conservation Engineering Measures on Soil Productivity of Slope Farmland in Black Soil Area
摘要
Abstract
In order to explore the effects of different soil and water conservation engineering measures on soil productiv-ity of slope farmland in black soil area,two kinds of soil and water conservation measures(terrace and ridge)in Xingmu small watershed of Dongliao County,Liaoyuan City,Jilin Province in northeast black soil area were taken as the research objects,and the slope farmland without measureswas taken as the control(CK1 and CK2).The differences of soil productivity of different soil and water conservation measures at different slope positions and the dominant factors af-fecting soil productivity were compared and analyzed.The results showed that:1)terraces and ridges significantly im-proved soil quality.Compared with CK1 and CK2 slope farmland without measures,the contents of total nitrogen,total potassium,available phosphorus,organic matter and clay mass fraction in terraces and ridges increased by 40.25%and 16.16%,9.14%and 5.57%,33.27%and 24.50%,30.25%and 7.94%,8.47%and 5.03%,respectively,and the sand mass fraction decreased by 7.08%and 12.35%.2)The middle slope position was the most sensitive to soil and water conservation measures.Compared with CK1 and CK2,the contents of total nitrogen,total potassium,available phosphorus,organic matter and clay mass fraction in the middle slope position increased by 84.58%and 30.15%,16%and 8.04%,48.49%and 38.92%,38.02%and 11.24%,18.92%and 9.21%,respectively,and the difference was significant(P<0.05).3)The soil productivity index ranged from 0.29 to 0.49,and there were differences in soil pro-ductivity index under different measures.Compared with CK1,the soil productivity index of terraced fields increased by 24.05%,65.85%(P<0.05)and 11.81%at the upper,middle and lower slopes,respectively.Compared with CK2,the soil productivity index of ridges increased by 10.00%,49.95%(P<0.05)and 35.20%at the upper,middle and lower slopes,respectively.4)The differences of soil water content,total nitrogen,total potassium,available phospho-rus content and organic matter mass fraction under different measures gradually decreased with the increase of soil depth.The depth of 0-10cm soil layer was significantly higher than that of other soil layers,while the change trend of soil bulk density was opposite.5)Multivariate variance and redundancy analysis showed that the type of measures,slope po-sition,soil layer,type×slope position,type×soil layer had significant effects on soil productivity.Soil total nitrogen mass fraction had the greatest impact on soil productivity index,followed by soil bulk density.The implementation of soil and water conservation measures on slope farmland in black soil area increased soil water content,soil nutrients,clay mass fraction,and reduced bulk density and sand mass fraction,indicating that soil and water conservation measures can ef-fectively improve soil productivity,and terrace measures are better than ridges;among different measures,the change of middle slope position is the most significant,which mainly affects the soil productivity by changing the soil total nitrogen mass fraction and bulk density of middle slope position.It is recommended to give priority to the implementation of ter-race projects in the middle slope position,and to use total nitrogen and bulk density as key monitoring indicators to maxi-mize the benefits of soil improvement and productivity improvement of soil and water conservation measures.关键词
黑土区/水土保持工程措施/土壤生产力/梯田/地埂/坡位/土层/土壤养分Key words
Black soil area/soil and water conservation project measures/soil productivity/terraces/ridge/slope posi-tion/soil layer/soil nutrients分类
农业科技引用本文复制引用
张桐桐,刘滨辉..黑土区水土保持工程措施对坡耕地土壤生产力的空间分异效应及驱动机制[J].森林工程,2026,42(1):23-34,12.基金项目
国家重点研发计划(2024YFD1501402). （2024YFD1501402）
