宁夏东部风沙区固定沙丘土壤性质小尺度空间变异特征

doi:10.13287/j.1001-9332.202109.030

应用生态学报 ›› 2021, Vol. 32 ›› Issue (9): 3195-3203.doi: 10.13287/j.1001-9332.202109.030

宁夏东部风沙区固定沙丘土壤性质小尺度空间变异特征

展秀丽¹, 许艺馨¹, 王红², 高滢³, 韩磊^1,4*

¹宁夏大学地理科学与规划学院, 银川 750021;
²兰州大学资源环境学院, 兰州 730000;
³陕西师范大学地理科学与旅游学院, 西安 710119;
⁴宁夏旱区资源评价与环境调控重点实验室, 银川 750021

收稿日期:2021-01-29 接受日期:2021-06-28 出版日期:2021-09-15 发布日期:2022-03-15
通讯作者: * E-mail: layhan@163.com
作者简介:展秀丽, 女, 1983年生, 副教授。主要从事干旱区自然地理与荒漠生态学研究。E-mail: zhanxiuli@mail.bnu.edu.cn
基金资助:
第三批“宁夏青年科技人才托举工程”项目(TJGC2018088)、宁夏自然科学基金项目(2021AAC03048)和国家自然科学基金项目(31760236)资助

Spatial variability of soil properties in fixed sand dunes of the Eastern Ningxia Province

ZHAN Xiu-li¹, XU Yi-xin¹, WANG Hong², GAO Ying³, HAN Lei^1,4*

¹School of Geography and Planning, Ningxia University, Yinchuan 750021, China;
²College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;
³School of Geography and Tourism, Shaanxi Normal University, Xi'an 710119, China;
⁴Ningxia Key Laboratory of Resource Assessment and Environment Regulation in Arid Region, Ningxia University, Yinchuan 750021, China

Received:2021-01-29 Accepted:2021-06-28 Online:2021-09-15 Published:2022-03-15
Contact: * E-mail: layhan@163.com
Supported by:
Third Batch of Ningxia Youth Talents Supporting Program (TJGC2018088), the Natural Science Foundation of Ningxia (2021AAC03048) and the National Natural Science Foundation of China (31760236).

摘要/Abstract

摘要： 随着流动沙丘的不断固定,不同地形部位的土壤机械组成、有机碳(SOC)和全氮(TN)含量的变化存在差异。为了探明固定沙丘的土壤机械组成与土壤养分空间变异特征,本研究以宁夏黄沙古渡固定沙丘为对象,分析了固定沙丘不同部位、不同土层的风沙土机械组成、SOC和TN特征。结果表明: 各土层土壤机械组成均以中沙和细沙为主。SOC和TN有明显的表聚作用,SOC和TN含量最大值分别为5.781和0.412 g·kg^-1,分布在丘间地,脊线和背风坡含量最少。随着土层深度的增加,背风坡和迎风坡的SOC含量逐渐减少,丘间地的SOC含量先减少后增加。SOC和TN在小尺度上均表现出明显的空间异质性;SOC和TN与粉沙和极细沙含量呈显著正相关,与中沙和粗沙含量呈显著负相关。土壤机械组成对SOC和TN含量有明显影响,而且SOC和TN含量随着细颗粒含量的增加而增加,表明土壤细颗粒对有机质的吸附和积累起着重要作用。

关键词: 土壤机械组成, 土壤有机碳, 全氮, 空间变异, 固定沙丘

Abstract: As sand dunes gradually become fixed, soil particle size, soil organic carbon (SOC) and total nitrogen (TN) contents vary across different locations of the dunes. To investigate the spatial variation of soil particle size distribution and soil nutrition in the fixed sand dunes, we examined particle composition, SOC and TC features in different locations of dunes in the Eastern Ningxia. The results showed that the particle sizes of each soil layer were mainly characterized by medium and coarse sands. The SOC and TN contents were higher in surface soil layers, with a maximum of 5.781 and 0.412 g·kg^-1, respectively, which were observed in interdune lands and dune ridges, while the leeward slope of the dunes showed the least. The SOC content of both the leeward and windward slope gradually decreased with increasing soil depth along the dune. By contrast, that of the interdune lands decreased first and then increased. At small scale, both the SOC and TN contents showed a clear spatial heterogeneity. There was a positive correlation between soil nutrition contents (SOC and TN) and silt and very fine sand contents in the fixed sand dunes, and a negative correlation with medium and coarse sand contents. Our results implied that soil particle size composition influenced SOC and TN contents. The contents of soil nutrition increased with increa-sing contribution of fine particles, highlighting the role of fine particles in adhesion and accumulation of organic matter.

Key words: soil mechanical composition, soil organic carbon (SOC), total nitrogen (TN), spatial variability, fixed dune

展秀丽, 许艺馨, 王红, 高滢, 韩磊. 宁夏东部风沙区固定沙丘土壤性质小尺度空间变异特征[J]. 应用生态学报, 2021, 32(9): 3195-3203.

ZHAN Xiu-li, XU Yi-xin, WANG Hong, GAO Ying, HAN Lei. Spatial variability of soil properties in fixed sand dunes of the Eastern Ningxia Province[J]. Chinese Journal of Applied Ecology, 2021, 32(9): 3195-3203.

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宁夏东部风沙区固定沙丘土壤性质小尺度空间变异特征

Spatial variability of soil properties in fixed sand dunes of the Eastern Ningxia Province

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