欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志 ›› 2024, Vol. 43 ›› Issue (12): 3571-3579.doi: 10.13292/j.1000-4890.202412.030

• 研究报告 • 上一篇    下一篇

毛乌素沙地典型下垫面土壤粒度特征

张令光1,2,3,成龙1,2,3,孙迎涛1,2,3,庞营军1,2,3,李佳1,2,3,贾晓红1,2,3*,费兵强1,2,3,修晓敏1,2,3,殷婕1,2,3,吴波1,2,3   

  1. 1中国林业科学研究院荒漠化研究所, 北京 100091; 2中国林业科学研究院生态保护与修复研究所, 北京 100091; 3荒漠生态系统与全球变化国家林业和草原局重点实验室, 北京 100091)

  • 出版日期:2024-12-10 发布日期:2024-12-04

Grain size characteristics of soil on typical underlying surfaces in Mu Us Sandy Land.

ZHANG Lingguang1,2,3, CHENG Long1,2,3, SUN Yingtao1,2,3, PANG Yingjun1,2,3, LI Jia1,2,3, JIA Xiaohong1,2,3*, FEI Bingqiang1,2,3, XIU Xiaomin1,2,3, YIN Jie1,2,3, WU Bo1,2,3   

  1. 1Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China; 2Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, China; 3Key Laboratory of State Forestry and Grassland Administration on Desert Ecosystem and Global Change, Beijing 100091, China).

  • Online:2024-12-10 Published:2024-12-04

摘要: 为揭示毛乌素沙地不同下垫面土壤粒径分布特征,以毛乌素沙地典型下垫面沙地(固定沙地、半固定沙地和流动沙地)和滩地作为研究对象,分别采集0~5、5~10和10~20 cm深度土壤样品,对比分析了不同下垫面土壤粒度组成、参数和粒配曲线的差异。结果表明:沙地土壤沙粒含量较高,接近90%,高出滩地30%,而极细沙和黏粉粒含量较低,约为3%~15%,低于滩地25%以上;不同固定程度沙地间沙粒含量无显著差异,但固定沙地极细沙和黏粉粒含量较高(10%~15%),高出半固定及流动沙地7%以上;毛乌素沙地土壤平均粒径为2.22 Φ,标准偏差为0.86 Φ,分选性较差,偏度为0.14,粒度呈正偏分布,其中沙地土壤粒度参数小于滩地,而不同固定程度沙地表现为流动及半固定沙地<固定沙地;沙地土壤跃移组分的粒径区间大致为1~3.5 Ф,滩地大致为1~6 Ф;滩地跃移组分的分选性劣于沙地,而悬移组分的分选性优于沙地。毛乌素沙地不同下垫面土壤粒度特征存在显著差异,研究结果可为分类分区指导半干旱地区荒漠化防治提供理论依据。


关键词: 土壤粒度, 滩地, 沙地, 毛乌素沙地

Abstract: To reveal the soil particle size distribution characteristics of different underlying surfaces of Mu Us Sandy Land, we analyzed soil grain size composition, parameters and particle size distribution curves of different underlying surfaces (fixed sandy land, semi-fixed sandy land, shifting sandy land, and lowland) by collecting soil samples at 0-5, 5-10 and 10-20 cm depth. The results showed that soil sand content in sandy lands was nearly 90%, being 30% higher than that in lowland. The content of very fine sand and clay+silt was between 3% to 15%, being more than 25% lower than that in lowland. There was no significant difference in sand content among fixed, semi-fixed and shifting sandy land. The content of very fine sand and clay+silt of soil in fixed sandy land was 10%-15%, being more than 7% higher than that in semi-fixed sandy land and shifting sandy land. The mean size of soil particles was 2.22 Φ, the standard deviation was 0.86 Φ, and the skewness was 0.14, which means the particle size shows a skew-normal distribution and poor sorting ability. The grain size parameters of soil in sandy lands were smaller than that in lowland. The particle size of sand dunes with different fixed degrees was in an order of shifting and semi-fixed sand dunes < fixed sand dunes. The particle size interval of the saltation in sandy lands and lowland was 1-3.5 Φ and 1-6 Φ, respectively. The sorting of saltation in lowland was worse than that in sandy lands, while the sorting of suspension was better. There were significant differences in grain size characteristics of soil among different underlying surfaces in Mu Us Sandy Land. The results could provide a theoretical basis for guiding desertification combating by classification at different zones in semi-arid regions.


Key words: soil particle size, lowland, sandy land, Mu Us Sandy Land