水土保持研究2025，Vol.32Issue(2)：207-214,223,9.DOI:10.13869/j.cnki.rswc.2025.02.010
吉兰泰荒漠绿洲过渡带土壤生态化学计量特征及养分恢复状况研究
Study on soil stoichiometry characteristics and nutrient restoration status in the Jilantai desert-oasis ecotone
摘要
Abstract
[Objective]The aims of this study are to investigate the characteristics of soil nutrients and their ecological stoichiometry on different underlying surfaces,to clarify the coupling relationship between vegetation succession and soil properties,and to provide a theoretical basis for vegetation restoration in the region.[Methods]Based on a combination of field sampling and indoor experiments,four types of underlying surfaces(shifting sandy land,semi-fixed sandy land,fixed sandy land and sheltered forest land)were selected in Jilantai desert-oasis ecotone.Soil bulk density(BD),soil moisture(SM),soil organic carbon(SOC),total nitrogen(TN),total phosphorus content(TP)and stoichiometry at a depth of 30 cm were measured to reveal the distribution characteristics of soil nutrient contents and stoichiometric ratios in different underlying surfaces,as well as the correlation with other environmental factors.[Results](1)The soil indexes of different underlying surfaces in Jilantai desert-oasis ecotone were in accordance with normal distribution(p＞0.05).In terms of coefficients of variation,BD and soil total porosity(STP)were weakly variable,whereas the remaining indicators were strongly variable.(2)Except for TP and BD,other indicators decreased in the order:sheltered forest land＞fixed sandy land＞mobile sand dunes＞semi fixed sandy land,indicating that the process of oasis transformation was beneficial for soil nutrient accumulation.(3)The ratios of C:N,C:P,and N:P of soils different underlying surfaces varied with the depth of soil layer.The ratios of C:N,C∶P,and N:P in different underlying surfaces ranged from 2.94 to 70.00,6.89 to 240.95,and 0.64 to 23.22,respectively.(4)The soil nutrient recovery index in different underlying surfaces decreased in the order:sheltered forest＞fixed sandy land＞semi fixed sandy land.[Conclusion]Artificial vegetation is more conducive to soil nutrient accumulation.These research results can provide basic information for vegetation restoration and conservation of desert-oasis ecotone.关键词
土壤养分/生态化学计量/下垫面/荒漠绿洲过渡带/吉兰泰Key words
soil nutrients/ecological stoichiometry/underlying surface/desert-oasis ecotone/Jilantai分类
农业科技引用本文复制引用
韩彦隆,魏亚娟,左小锋,左轶璆,康帅,童国利,李建媛,王永平..吉兰泰荒漠绿洲过渡带土壤生态化学计量特征及养分恢复状况研究[J].水土保持研究,2025,32(2):207-214,223,9.基金项目
自治区高等学校碳达峰碳中和研究专项(STZX202213) （STZX202213）
高层次人才引进项目(BTTCRCQD2024-003) （BTTCRCQD2024-003）
国家自然科学基金(4196700) （4196700）
