干旱区研究2025，Vol.42Issue(3)：456-466,11.DOI:10.13866/j.azr.2025.03.06
添加膨润土对风蚀沙化土壤理化性质及植被生长的影响
Effects of addition of the bentonite on the physicochemical properties and vegetation growth of wind-eroded sandy soil
摘要
Abstract
Desertification is a serious environmental problem globally,severely restricting the sustainable devel-opment of regional economies.In recent years,clay minerals have been widely used for improving wind-eroded and sandy soil,and bentonite with its unique 2:1 layered structure has particularly good prospects for application in the improvement of wind-eroded and sandy soil.In this study,the effects of different proportions of bentonite[without bentonite addition(B0),2%bentonite addition(B2),and 4%bentonite addition(B4)]on the physical and chemical properties of wind-eroded and desertified soil and plant growth were studied.The results showed the following:(1)Bentonite addition increased the content of fine-grained soil and improved the soil's water re-tention and water holding capacity(12%-88%).(2)The shear strength of wind-eroded and sandy soil supplement-ed with B2 and B4 bentonite was increased by 150%and 205%,respectively,compared with that upon B0 treat-ment.(3)Bentonite addition can lead to crust formation on the sandy surface,which is beneficial for sand fixa-tion.(4)Among the treatments,B4 bentonite addition significantly increased plant coverage,biomass,and plant height by 32%-33%,56%-85%,and 71%-107%,respectively.In summary,the addition of bentonite not only im-proved the soil's water retention capacity,improved the soil's physical properties,and fixed the sandy surface,but also promoted plant growth.关键词
沙地改良/土壤保水/土壤抗剪切强度/固沙作用Key words
sandy soil amelioration/soil moisture conservation/soil shear resistance strength/sand stabilization mechanisms引用本文复制引用
刘全渝,李从娟,李桂真..添加膨润土对风蚀沙化土壤理化性质及植被生长的影响[J].干旱区研究,2025,42(3):456-466,11.基金项目
新疆维吾尔自治区重点研发计划(2022B03030) （2022B03030）
新疆维吾尔自治区"天山创新团队"(2024D14014) （2024D14014）
新疆维吾尔自治区"天山英才"(2022TSYCCX0004,2022TSYCJC0005) （2022TSYCCX0004,2022TSYCJC0005）
