干旱区生态环境知识资源中心(Arid): Effects of checkerboard barriers on the distribution of aeolian sandy soil particles and soil organic carbon

Arid

DOI	10.1016/j.geomorph.2019.04.016
	Effects of checkerboard barriers on the distribution of aeolian sandy soil particles and soil organic carbon
	Dai, Yujie 1,2; Dong, Zhi 1,2; Li, Hongli 1,2; He, Yuxin 3; Li, Jinrong 4; Guo, Jianying 4
通讯作者	Li, Hongli ; He, Yuxin
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2019
卷号	338 页码:79-87
英文摘要	Sand-barrier setup is an important measure to protect the topsoil against wind erosion. Salix psammophila checkerboard barriers are used widely in the Mu Us Sandy Land in order to ensure the safety of life and agricultural production. To measure variations in soil structure and quality caused by barriers with different duration (7 years and 2 years), the composition of aeolian sandy soil particles and the soil organic carbon (SOC) distributions are studied; the dunes with no barrier are used as controls (CK). Analyzed by multi-fractal parameters, the topsoil samples are collected in the field and tested in the laboratory. The predominant soil particles are fine sand, medium coarse sand and clay, and the contents of silt and very fine sand increase with extending barrier duration, which shows a wider distribution range, greater dispersion degree and larger soil particle heterogeneity. The aeolian sandy particles, particularly fine granular grains, are deposited and accumulate at the bottom and top of dunes because of the barrier blocking effect. The particle size distribution (PSD) heterogeneity is the highest in 7-year barrier dunes and the lowest in the no barrier dunes. The mean values of D-0 (Capacity dimension) of 7-year barrier dunes, D-1 (entropy dimension) of the no barrier dunes and D-1/D-0 of 2-year barrier dunes are maxima. In addition, the PSD range and distribution increased with prolonged dune barrier duration, as well as the changes of Delta f (partial derivative) (shape of the multi-fractal spectrum) and Delta partial derivative (width of multi-fractal spectrum). SOC content increased with increasing barrier duration and decreasing D-1/D-0. The average SOC contents of 7-year barrier dunes were the maximum and one of no barrier dunes had the minimum SOC content, and their difference was significant (P < 0.05). In both the PSD and SOC distribution, the 7-year barrier showed better results on the topsoil than that of 2-year and no barrier situation. Correlations between the SOC content and the PSD multi-fractal parameters of both 7-year and 2-year barrier dunes are significantly different (P< 0.01). The multi-fractal parameters can be used to indicate soil nutrient contents, which provide fundamental knowledge for evaluating the effectiveness of ecological engineering to restore soil quality and structure to sandy ecosystems. Salix psammophila checkerboard sand barriers play a role in increasing the fine particles and soil organic carbon in surface dune soil, which is helpful in restoring the Mu Us sand ecosystem. The early use of sand barriers is therefore recommended. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Multi-fractal theory Soil organic carbon (SOC) Salix psammophila sand barriers Aeolian soil grain size distribution
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000470947500007
WOS关键词	SIZE DISTRIBUTIONS ; TENGGER DESERT ; LOESS PLATEAU
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216012
作者单位	1.Shandong Agr Univ, Forestry Coll, Tai An 271018, Shandong, Peoples R China; 2.Taishan Forest Ecosyst Res Stn, Tai An 271018, Shandong, Peoples R China; 3.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China; 4.Minist Water Resources China, Inst Water Resources Pastoral Area, Beijing 010020, Peoples R China
推荐引用方式 GB/T 7714	Dai, Yujie,Dong, Zhi,Li, Hongli,et al. Effects of checkerboard barriers on the distribution of aeolian sandy soil particles and soil organic carbon[J],2019,338:79-87.
APA	Dai, Yujie,Dong, Zhi,Li, Hongli,He, Yuxin,Li, Jinrong,&Guo, Jianying.(2019).Effects of checkerboard barriers on the distribution of aeolian sandy soil particles and soil organic carbon.GEOMORPHOLOGY,338,79-87.
MLA	Dai, Yujie,et al."Effects of checkerboard barriers on the distribution of aeolian sandy soil particles and soil organic carbon".GEOMORPHOLOGY 338(2019):79-87.