Impacts of rainfall and soil conservation measures on soil, SOC, and TN losses on slopes in the black soil region, northeastern China

doi:10.1016/j.ecolind.2021.108016

	Impacts of rainfall and soil conservation measures on soil, SOC, and TN losses on slopes in the black soil region, northeastern China
	Fang Haiyan 1,2
刊名	ECOLOGICAL INDICATORS
	2021-10-01
卷号	129 页码:12
关键词	Runoff plot Soil loss Soil organic carbon Total nitrogen Soil conservation measure
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2021.108016
通讯作者	Fang Haiyan(fanghy@igsnrr.ac.cn)
英文摘要	Water erosion significantly affects the productive black soils in Northeastern China. The aim of this study was to analyze the impacts of rainfall characteristics, slope, and soil conservation measures on soil, soil organic carbon (SOC), and total nitrogen (TN) losses and thus to help implement a rational soil loss control strategy. The present study was conducted using sampled soil, runoff, and soil loss data from the plots in the years 2014, 2015, and 2020 when the rainfall characteristics varied greatly. Studies found that soil, SOC, and TN losses on the 18 plots differed greatly, depending on soil conservation measures, slope and rainfall characteristics. Bare and updownslope (UD) cultivated plots suffered the highest loss rates of soil, SOC, and TN. In 2014, annual loss rates of soil, SOC, and TN on the UD plots reached 5849, 88.55, and 6.84 t km-2 yr- 1, respectively. In 2015, soil loss rate (SLR) on the UD plots approached 434.88 t km-2 yr- 1 with SOC and TN loss rates of 5.83 and 0.44 t km-2 yr- 1. In 2020, the mean SLR on the UD plots was 637.96 t km-2 yr- 1 which was lower than that (i.e., 1385.61 t km-2 yr- 1) on the bare plots. Annual loss rates of soil, SOC, and TN presented an increasing trend with increasing slope degree. The soil, SOC and TN control efficiencies of contour tillage and hedgerow planting on the 3 degrees and 5 degrees plots were around 90%. The mean SLR on the 53-m terraced plots was two times the tolerable value (i.e., 200 t km-2 yr- 1). The size of terrace on steep slopes should be reconsidered, and slope length should be reduced. Bare and UD slopes must be implemented with rational soil conservation measures to control soil, TN, and SOC losses in the black soil region of northeastern China.
资助项目	National Natural Science Foundation of China[41977066] ; Beijing Natural Science Foundation[8202045]
WOS关键词	ORGANIC-CARBON ; AGRICULTURAL CATCHMENT ; WATER EROSION ; LOESS PLATEAU ; RUNOFF ; NITROGEN ; DEPOSITION ; FARMLAND ; DYNAMICS
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000681695800001
资助机构	National Natural Science Foundation of China ; Beijing Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164717]
专题	中国科学院地理科学与资源研究所
通讯作者	Fang Haiyan
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fang Haiyan. Impacts of rainfall and soil conservation measures on soil, SOC, and TN losses on slopes in the black soil region, northeastern China[J]. ECOLOGICAL INDICATORS,2021,129:12.
APA	Fang Haiyan.(2021).Impacts of rainfall and soil conservation measures on soil, SOC, and TN losses on slopes in the black soil region, northeastern China.ECOLOGICAL INDICATORS,129,12.
MLA	Fang Haiyan."Impacts of rainfall and soil conservation measures on soil, SOC, and TN losses on slopes in the black soil region, northeastern China".ECOLOGICAL INDICATORS 129(2021):12.