干旱区生态环境知识资源中心(Arid): Variation of soil organic matter with particle size in the wind erosion region of northern China

Arid

DOI	10.1016/j.catena.2024.108025
	Variation of soil organic matter with particle size in the wind erosion region of northern China
	Wu, Xintong; Wang, Saiya; Cheng, Hong; Yang, Yang
通讯作者	Cheng, H
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2024
卷号	241
英文摘要	Soil wind erosion is one of the most important surface processes in the arid and semi-arid regions of northern China, which serves as an important driver for the migration and turnover of soil organic matter (SOM) and should be given full attention in regional as well as in global carbon cycles. Wind tends to transport fine soil particles typically enriched with SOM, which, however, has been frequently ignored and the mean SOM of the bulk soil is instead used in the carbon budgets at various scales. The objective was then to characterize the variations of SOM with soil particle size and to establish the predictive models for SOM in the wind erosion region of northern China. A total of 84 soil samples were collected in the wind erosion region of northern China, covering 3 climatic regions, 17 erodible soil types, and 5 land uses. Each sample was sieved into 8 size classes of 0-63, 63-100, 100-150, 150-200, 200-250, 250-300, 300-400 and 400-880 mu m using the classical dry sieving method, and the potassium dichromate volumetric method was applied to determine SOM for each class. No matter for which size class, SOM basically decreased from east to west, which was consistent with the spatial distribution trends of precipitation and the normalized difference vegetation index (NDVI). The magnitudes and variations of SOM with particle size, moreover, differed among soil types and land uses. For most of the soil samples, i.e., 63 out of the total 84 (75 %), SOM generally decreased with particle size. Whereas for the remaining samples, SOM tended to increase or remained rather consistent as the particle size increased. The relationships between SOM and particle size highly depended on the climatic factors of precipitation and temperature, as well as the vegetation type and health as indicated in the magnitudes of NDVI. The corresponding models developed exhibited high accuracies for SOM prediction, which were capable of explaining 70-90 % of the total SOM variations. These findings hold important implications for understanding the mechanisms of carbon loss in the wind erosion region of northern China.
英文关键词	Soil organic matter Particle size Spatial distribution Predictive model Wind erosion region of northern China
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001231577300001
WOS关键词	SPATIAL-DISTRIBUTION ; LOESS PLATEAU ; CONSERVATION TILLAGE ; CARBON FRACTIONS ; INNER-MONGOLIA ; GRASSLAND ; VARIABILITY ; LAND ; DECOMPOSITION ; MECHANISMS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403151
推荐引用方式 GB/T 7714	Wu, Xintong,Wang, Saiya,Cheng, Hong,et al. Variation of soil organic matter with particle size in the wind erosion region of northern China[J],2024,241.
APA	Wu, Xintong,Wang, Saiya,Cheng, Hong,&Yang, Yang.(2024).Variation of soil organic matter with particle size in the wind erosion region of northern China.CATENA,241.
MLA	Wu, Xintong,et al."Variation of soil organic matter with particle size in the wind erosion region of northern China".CATENA 241(2024).