气候变化领域集成服务门户(CCPortal): Soil organic carbon as functions of slope aspects and soil depths in a semiarid alpine region of Northwest China

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DOI	10.1016/j.catena.2017.01.011
	Soil organic carbon as functions of slope aspects and soil depths in a semiarid alpine region of Northwest China
	Zhu, Meng; Feng, Qi; Qin, Yanyan; Cao, Jianjun; Li, Huiya; Zhao, Yu
发表日期	2017
ISSN	0341-8162
EISSN	1872-6887
卷号	152
英文摘要	Soils in alpine regions associated with complex topography are characterized by large variability in the spatial distribution of soil organic carbon (SOC). However, the patterns and topographic controls on SOC at the hill scale in semiarid alpine regions are not well understood. In this study, the effects of slope aspects and depths on SOC Were quantified based on field investigations in a mainly undisturbed region of the Qilian Mountains in northwestern China. Soil samples were collected at 0-10, 10-20, 20-40 and 40-60 cm on south-, southwest-, west-, and north-facing slopes of three hills. Results showed that the SOC density at 0-60 cm varied from 9.73 to 35.21 kg m(-2), and increased from the south- to north-facing slopes. The average SOC density on the north-facing slopes was about 32, 2.9 and 1.9 times larger than on the south-, southwest- and west-facing slopes. Both the general linear model and mixed linear model suggested that, at the hill scale, the slope aspects and soil depths explained the main variations of SOC concentration in our study. The profile pedotransfer function method indicated that the SOC varied predictably with soil depths and aspects, and the prediction functions well predicted the SOC data from literature. Our results highlight the importance of slope aspect as an indicator of the SOC, and demonstrate that the transformed aspect is a good continuous variable in predicting the SOC in the semiarid alpine region. (C) 2017 Elsevier B.V. All rights reserved.
关键词	Semiarid alpine region Soil organic carbon Slope aspect Soil depth Profile pedotransfer function
学科领域	Geology; Agriculture; Water Resources
语种	英语
WOS研究方向	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
来源期刊	CATENA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111929
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Meng,Feng, Qi,Qin, Yanyan,et al. Soil organic carbon as functions of slope aspects and soil depths in a semiarid alpine region of Northwest China[J]. 中国科学院西北生态环境资源研究院,2017,152.
APA	Zhu, Meng,Feng, Qi,Qin, Yanyan,Cao, Jianjun,Li, Huiya,&Zhao, Yu.(2017).Soil organic carbon as functions of slope aspects and soil depths in a semiarid alpine region of Northwest China.CATENA,152.
MLA	Zhu, Meng,et al."Soil organic carbon as functions of slope aspects and soil depths in a semiarid alpine region of Northwest China".CATENA 152(2017).