气候变化领域集成服务门户(CCPortal): Effects of gravel-sand mulch on the runoff, erosion, and nutrient losses in the Loess Plateau of north-western China under simulated rainfall

CCPortal

DOI	10.17221/141/2019-SWR
	Effects of gravel-sand mulch on the runoff, erosion, and nutrient losses in the Loess Plateau of north-western China under simulated rainfall
	Qiu, Yang; Wang, Xinping; Xie, Zhongkui; Wang, Yajun
通讯作者	Xie, ZK (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, Lanzhou, Peoples R China.
发表日期	2021
ISSN	1801-5395
EISSN	1805-9384
起始页码	22
结束页码	28
卷号	16 期号:1
英文摘要	Gravel mulching is a characteristic agricultural technique that has been used for hundreds of years in the north-western Loess Plateau of China. However, the effects of the gravel-sand mulch on the processes of the runoff, soil erosion, and nutrient losses are neither fully distinguished nor even known in many parts of the world. This study investigated how different gravel particle sizes in the mulch affected the runoff, erosion as well as the extent of the nutrient losses in the surface runoff. The laboratory experiments were conducted using a rainfall simulator with three gravel mulch treatments: (1) fine gravel mulch (FG); (2) medium gravel mulch (MG); (3) coarse gravel mulch (CG) and a control group, bare soil (BS). The results of these rainfall simulation experiments gave estimates on how the grain size influences the runoff and losses of the soil and its nutrients. Applying the gravel mulch significantly delayed the runoff's starting time when compared with the bare soil. Both the total runoff and soil loss increased with the grain size of the gravel mulch. Compared with the bare soil, the lowest surface runoff and soil loss was observed from the fine gravel treatment. These results clearly show that gravel mulch plays an important role in the runoff and sediment generation processes, and that it significantly reduces the surface runoff and soil loss. The losses of the total nitrogen (TN), total phosphorus (TP), and total organic carbon (TOC) from the bare soil were much higher than those under the gravel mulching. The fluctuations in these nutrient-loss processes were the most intense in the CG treatment, while the TC content, in initial runoff, was significantly higher in the FG than the other treatments. Our findings suggest gravel mulch is a useful water and soil conservation technique in the loess area of north-western China, and these results can inform one on the theoretical principles for properly utilising gravel-mulched fields.
关键词	SURFACE RUNOFF SOIL PHOSPHORUS TEMPERATURE EVAPORATION SEDIMENT SLOPES REGION FIELDS YIELD
英文关键词	gravel mulch; rainfall simulation; sediment; soil erosion; surface runoff
语种	英语
WOS研究方向	Agriculture ; Water Resources
WOS类目	Soil Science ; Water Resources
WOS记录号	WOS:000600770300003
来源期刊	SOIL AND WATER RESEARCH
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/253934
作者单位	[Qiu, Yang; Wang, Xinping; Xie, Zhongkui; Wang, Yajun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Qiu, Yang,Wang, Xinping,Xie, Zhongkui,et al. Effects of gravel-sand mulch on the runoff, erosion, and nutrient losses in the Loess Plateau of north-western China under simulated rainfall[J]. 中国科学院西北生态环境资源研究院,2021,16(1).
APA	Qiu, Yang,Wang, Xinping,Xie, Zhongkui,&Wang, Yajun.(2021).Effects of gravel-sand mulch on the runoff, erosion, and nutrient losses in the Loess Plateau of north-western China under simulated rainfall.SOIL AND WATER RESEARCH,16(1).
MLA	Qiu, Yang,et al."Effects of gravel-sand mulch on the runoff, erosion, and nutrient losses in the Loess Plateau of north-western China under simulated rainfall".SOIL AND WATER RESEARCH 16.1(2021).