干旱区生态环境知识资源中心(Arid): 腾格里沙漠东南缘4种典型沙生灌木林下的沉积物粒度特征

Arid

	腾格里沙漠东南缘4种典型沙生灌木林下的沉积物粒度特征
其他题名	Grain size characteristics of sediment under four typical sand shrubs in the southeast edge of Tengger Desert
	吴雪琴; 解云虎; 刘晓茜; 丁婧; 海春兴
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2021
卷号	19 期号:3 页码:2096-2673
中文摘要	绿洲-荒漠过渡带是沙漠和绿洲相互转化的生态敏感和脆弱地带,如何选择适宜该区域生长的沙生灌木是从事沙漠和绿洲工作者最为关注的热点话题之一。分析腾格里沙漠东南缘绿洲-荒漠过渡带内沙蒿、白刺、梭梭和花棒4种典型沙生灌木林下沉积物的粒度组成、粒度参数及其空间分布特征。结果表明:1)4种灌木林下表土沉积物组成均以中沙为主;林下沉积物粒级体积分数变化规律表现为沙蒿和白刺相同,梭梭和花棒相同。2)沉积物的平均粒径范围为1.39Phi~1.88Phi,白刺林下沉积物的平均粒径从根部到外围无明显变化,与其他3种灌木相比颗粒变细;白刺林下沉积物分选性为中等,其他3种灌木林下沉积物分选性为较好;偏度均为负偏;峰度均为中等峰。3)细颗粒在沙蒿林下西南方向、白刺林下西北方向、梭梭林下东南方向、花棒林下东北方向累积。4)沉积物粒度在4种灌木西南100 cm处与株高呈显著负相关(P <0.05),在西北100 cm处与盖度呈显著正相关(P <0.05)。白刺作为过渡带内主要沙生灌木,其固沙和保土能力高于其他沙生灌木,且灌丛生长属集中连片簇生,防护范围较其他沙生灌木大。
英文摘要	[Background]The oasis-desert transition zone is an ecologically sensitive and fragile zone in which deserts and oasis transform each other.How to choose sandy shrubs suitable for growing in this area is one of the hot topics for practitioner engaged in desert and oasis.[Methods]In the desert-oasis ecotone in the southeastern edge of Tengger Desert,the surface soil sediment samples of 0-5 cm at the roots,50 and 100 cm from the roots of Artemisia desertorum,Nitraria tangutorum,Haloxylon ammodendron and Hedysarum scoparium,along the northwest,southwest,northeast and southeast directions were collected.Statistical methods were used to analyze the grain size composition and parameter changes of sediments under the shrubs,and spatial interpolation method to analyze spatial changes.[Results]1)The composition of the surface soil sediments under the four shrubs was mainly medium sand;the grain-level content of the understory sediments was the same as that of A.desertorum and N.tangutorum,and the same for H.ammodendron and H.scoparium.2)The average particle size of the sediment ranged from 1.39Phi-1.88Phi.The average particle size of the sediments under the N.tangutorum had no obvious change from the root to the periphery,and the particles were finer compared with the other three shrubs.The selectivity was medium,and the sediments of the other three shrub species were better.The skewness was negative and the kurtosis was medium peak.3)Fine particles accumulated in the southwest direction under the A.desertorum forest,the northwest direction under the N.tangutorum forest,the southeast direction under the H.ammodendron forest,and the northeast direction under the H.scoparium forest.4)Sediment grain size was significantly negatively correlated with plant height at 100 cm southwest of the four shrubs(P <0.05),and positively correlated with coverage at 100 cm northwest(P <0.05).[Conclusions]N.tangutorum as the main sandy shrub in the transition zone,its sand-fixing and soil-holding ability is higher than that of other sandy shrubs.The growth of shrubs is concentrated and clustered,and the protection range is larger than other sandy shrubs.
中文关键词	沙生灌木 ; 粒度特征 ; 荒漠-绿洲过渡带 ; 腾格里沙漠
英文关键词	sandy shrub grain-size characteristics desert-oasis ecotone Tengger Desert
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7008343
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365477
作者单位	吴雪琴, 内蒙古师范大学地理科学学院;;内蒙古自治区湿地环境修复工程实验室, ;;内蒙古自治区湿地环境修复工程实验室, 呼和浩特;;呼和浩特, ;; 010022;;010022.; 解云虎, 内蒙古农业大学, 呼和浩特, 内蒙古 010018, 中国.; 刘晓茜, 内蒙古师范大学地理科学学院, 呼和浩特, 内蒙古 010022, 中国.; 丁婧, 内蒙古师范大学地理科学学院, 呼和浩特, 内蒙古 010022, 中国.; 海春兴, 内蒙古师范大学地理科学学院, 呼和浩特, 内蒙古 010022, 中国.
推荐引用方式 GB/T 7714	吴雪琴,解云虎,刘晓茜,等. 腾格里沙漠东南缘4种典型沙生灌木林下的沉积物粒度特征[J]. 内蒙古农业大学,2021,19(3):2096-2673.
APA	吴雪琴,解云虎,刘晓茜,丁婧,&海春兴.(2021).腾格里沙漠东南缘4种典型沙生灌木林下的沉积物粒度特征.中国水土保持科学,19(3),2096-2673.
MLA	吴雪琴,et al."腾格里沙漠东南缘4种典型沙生灌木林下的沉积物粒度特征".中国水土保持科学 19.3(2021):2096-2673.