生态学报2026，Vol.46Issue(3)：1159-1170,12.DOI:10.20103/j.stxb.202505071101
腾格里沙漠半固定沙丘不同植被土壤粒径分形与养分特征
Fractal and nutrient characteristics of soil particle size under different plants in semi fixed dunes of Tengger Desert
摘要
Abstract
Exploring the differences in soil particle size under different plants in semi-fixed dunes of the Tengger Desert can provide important reference for the selection and breeding of artificial vegetation and ecological restoration in desert areas.In this paper,four plants of Phragmites australis,Calligonum mongolicum,Artemisia sphaerocephala and Nitraria tangutorum in Tengger Desert were selected.The fractal dimension and correlation analysis were used to analyze the soil particle size composition and nutrient content characteristics of different positions of the sand dune,covering the leeward slope of the sand dune,the top of the sand dune,and the windward slope of the sand dune.The results showed that the soil particle composition under the four kinds of vegetation in semi-fixed dunes was dominated by fine sand and medium sand,accounting for 52.97%—96.58%of the total soil content.The average soil particle size was Phragmites australis＞Nitraria tangutorum＞Calligonum mongolicum＞Artemisia sphaerocephala.The order of soil single fractal dimension D was Nitraria tangutorum(1.71)＞Phragmites australis(1.58)＞Calligonum mongolicum(1.55)＞Artemisia sphaerocephala(1.50),and the soil fractal dimension of leeward slope was larger than that of windward slope.The order of soil multifractal parameters information dimension D1,correlation dimension D2,information dimension/capacity dimension D1/D0 was:Nitraria tangutorum＞Calligonum mongolicum＞Artemisia ordosica＞Phragmites australis,and D0＞D1＞D2.The distribution of soil particles was significantly non-uniform,while the spectral width Δα and symmetry degree Δf of singular spectral function were the largest in Nitraria tangutorum and the smallest in Artemisia ordosica.Soil nutrient content,D,Δα and Δf were significantly positively correlated with the content of clay and silt,and significantly negatively correlated with sand.Compared with the other three types of vegetation,Nitraria tangutorum in the semi-fixed sandy area at the southeastern edge of the Tengger Desert had a stronger adsorption and immobilization capacity of soil particles,and a more substantial effect on the improvement of soil nutrient status,as well as a stronger comprehensive effect in the leeward slopes of the semi-fixed sand dunes.关键词
腾格里沙漠/土壤粒径/分形维数/土壤养分Key words
Tengger Desert/soil particle size/fractal dimension/soil nutrients引用本文复制引用
董晓宇,赵龙飞,张嘉,朱俐晨,伊丽娜,高兴,马慧..腾格里沙漠半固定沙丘不同植被土壤粒径分形与养分特征[J].生态学报,2026,46(3):1159-1170,12.基金项目
内蒙古自治区科技创新重大示范工程"揭榜挂帅"项目(2024JBGS0021-4-2) （2024JBGS0021-4-2）
内蒙古自治区自然科学基金项目(2024QN03062) （2024QN03062）
