Characteristics of Nitrogen Loss through Surface-Subsurface Flow on Red Soil Slopes of Southeast China
- Авторлар: Zheng H.1,2, Liu Z.1,2, Zuo J.1,2, Wang L.1,2, Nie X.1,2
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Мекемелер:
- Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention
- Jiangxi Institute of Soil and Water Conservation
- Шығарылым: Том 50, № 12 (2017)
- Беттер: 1506-1514
- Бөлім: Soil Erosion
- URL: https://journals.rcsi.science/1064-2293/article/view/224318
- DOI: https://doi.org/10.1134/S1064229317130063
- ID: 224318
Дәйексөз келтіру
Аннотация
Soil nitrogen (N) loss related to surface flow and subsurface flow (including interflow and groundwater flow) from slope lands is a global issue. A lysimetric experiment with three types of land cover (grass cover, GC; litter cover, LC; and bare land, BL) were carried out on a red soil slope land in southeast China. Total Nitrogen (TN) loss through surface flow, interflow and groundwater flow was observed under 28 natural precipitation events from 2015 to 2016. TN concentrations from subsurface flow on BL and LC plots were, on average, 2.7–8.2 and 1.5–4.4 times greater than TN concentrations from surface flow, respectively; the average concentration of TN from subsurface flow on GC was about 36–56% of that recorded from surface flow. Surface flow, interflow and groundwater flow contributed 0–15, 2–9 and 76–96%, respectively, of loss load of TN. Compared with BL, GC and LC intercepted 83–86% of TN loss through surface runoff; GC intercepted 95% of TN loss through subsurface flow while TN loss through subsurface flow on LC is 2.3 times larger than that on BL. In conclusion, subsurface flow especially groundwater flow is the dominant hydrological rout for N loss that is usually underestimated. Grass cover has the high retention of N runoff loss while litter mulch will increase N leaching loss. These findings provide scientific support to control N runoff loss from the red soil slope lands by using suitable vegetation cover and mulching techniques.
Негізгі сөздер
Авторлар туралы
Haijin Zheng
Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention; Jiangxi Institute of Soil and Water Conservation
Хат алмасуға жауапты Автор.
Email: haijinzheng@163.com
ҚХР, Nanchang, 330029; Nanchang, 330029
Zhao Liu
Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention; Jiangxi Institute of Soil and Water Conservation
Email: haijinzheng@163.com
ҚХР, Nanchang, 330029; Nanchang, 330029
Jichao Zuo
Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention; Jiangxi Institute of Soil and Water Conservation
Email: haijinzheng@163.com
ҚХР, Nanchang, 330029; Nanchang, 330029
Lingyun Wang
Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention; Jiangxi Institute of Soil and Water Conservation
Email: haijinzheng@163.com
ҚХР, Nanchang, 330029; Nanchang, 330029
Xiaofei Nie
Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention; Jiangxi Institute of Soil and Water Conservation
Email: haijinzheng@163.com
ҚХР, Nanchang, 330029; Nanchang, 330029