气候变化领域集成服务门户(CCPortal): Runoff and soil and nutrient losses from gravel mulching: A field experiment with natural rainfall on the Loess Plateau of China

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DOI	10.2489/jswc.2021.00084
	Runoff and soil and nutrient losses from gravel mulching: A field experiment with natural rainfall on the Loess Plateau of China
	Qiu, Y.; Lv, W.; Wang, X.; Wang, Y.; Li, J.; Xie, Z.
通讯作者	Xie, Z (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China.
发表日期	2021
ISSN	0022-4561
EISSN	1941-3300
起始页码	359
结束页码	368
卷号	76 期号:4
英文摘要	Gravel mulch has been used effectively to conserve agricultural water for three centuries in the semiarid Loess Plateau of northwestern China. In this study, gravel mulch field experiments on the slopes of the plateau were carried out to evaluate the effects of different particle sizes of gravel mulch and different slope gradients on surface runoff, soil erosion, and nutrient losses under natural rainfall throughout 2017 and 2018. Experiment plots (3 m x 5 m) on slopes of 5 degrees, 10 degrees, 15 degrees, and 30 degrees were implemented; in each plot, three gravel mulch treatments were investigated: fine gravel (2 to 5 mm in size, FG), coarse gravel (40 to 60 mm, CG), and the control that lacked any mulching (CK). We found that gravel mulching on soil significantly reduced both the amounts of runoff and soil loss under natural rainfall conditions in 2017 and 2018, for which the soil loss-suppression effect was most pronounced under FG mulching. Applying FG also significantly increased the rainfall threshold to generate runoff, and caused the fewest runoff events during the two years of monitoring. Coarse gravel mulching caused a strong reduction in soil loss on the relatively flat slopes (i.e., 5 degrees and 10 degrees) whereas its effect was weak on relatively steep slopes (i.e., 15 degrees and 30 degrees). The respective effects of FG and CG mulching on the losses of various nutrients from soil also differed markedly. The gravel mulching significantly increased the amounts of total nitrogen (TN), potassium (K), and nitrate-nitrogen (NO3-N) in the runoff but greatly decreased those of iron (Fe), copper (Cu), and zinc (Zn). Furthermore, the amount of nutrients lost in runoff increased with a steeper slope, with notably greater variability of nutrient elements in the runoff on the steepest slopes. Accordingly, FG mulching is recommended for use in arid and semiarid areas from the perspective of water, soil, and nutrient conservation.
关键词	WATER-USE EFFICIENCY SEMIARID REGION SAND MULCH EROSION INTERCEPTION TEMPERATURE EVAPORATION COVER YIELD SIZE
英文关键词	gravel mulching; Loess Plateau; nutrient losses; slope gradients; soil loss; surface runoff
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
WOS类目	Ecology ; Soil Science ; Water Resources
WOS记录号	WOS:000672726100009
来源期刊	JOURNAL OF SOIL AND WATER CONSERVATION
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/254051
作者单位	[Qiu, Y.; Lv, W.; Wang, X.; Wang, Y.; Li, J.; Xie, Z.] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China; [Lv, W.; Li, J.] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Qiu, Y.,Lv, W.,Wang, X.,et al. Runoff and soil and nutrient losses from gravel mulching: A field experiment with natural rainfall on the Loess Plateau of China[J]. 中国科学院西北生态环境资源研究院,2021,76(4).
APA	Qiu, Y.,Lv, W.,Wang, X.,Wang, Y.,Li, J.,&Xie, Z..(2021).Runoff and soil and nutrient losses from gravel mulching: A field experiment with natural rainfall on the Loess Plateau of China.JOURNAL OF SOIL AND WATER CONSERVATION,76(4).
MLA	Qiu, Y.,et al."Runoff and soil and nutrient losses from gravel mulching: A field experiment with natural rainfall on the Loess Plateau of China".JOURNAL OF SOIL AND WATER CONSERVATION 76.4(2021).