Effects of biochar incorporation and fertilizations on nitrogen and phosphorus losses through surface and subsurface flows in a sloping farmland of Entisol

doi:10.1016/j.agee.2020.106988

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Effects of biochar incorporation and fertilizations on nitrogen and phosphorus losses through surface and subsurface flows in a sloping farmland of Entisol
	Huang Rong; Gao Xuesong; Wang Fuhua; Xu Guoxin; Long Yi; Wang Changquan; Wang Zifang; Gao Ming
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2020
卷号	300 页码:UNSP 106988
关键词	Subsurface flow Surface flow Runoff plot Biochar Sloping farmland
ISSN号	0167-8809
DOI	10.1016/j.agee.2020.106988
通讯作者	Wang, Zifang(zifangw@126.com) ; Gao, Ming(gaoming@swu.edu.cn)
产权排序	3
文献子类	Article
英文摘要	Nitrogen (N) and phosphorus (P) loss in runoffs has been a serious problem in China due to the amount of chemical fertilizer currently applied to farmland. Biochar has been used as a soil amendment for increasing nutrient retention, water holding capacity, and crop yield. However, little is known about the influence of biochar on the runoff erosion from both surface flow and subsurface flow, especially in sloping regions. Experimental runoff plots were, therefore, set up on Entisols in a sloping farmland, involving four treatments: control (CT), conventional NPK fertilization (CF, based on local practices), optimum NPK fertilization (OF, based on the recommendation from local agriculture committee), and biochar combined with 85% of optimum NPK fertilizer (BF). The effects of the four treatments on the runoff fluxes, sediment yields and the runoff coefficients, as well as the N (ammonium (NH4+), nitrate (NO3-) and total N (TN)) and P (phosphate (PO43-), total P (TP), dissolved TP (DTP), particulate P (PP)) losses via both surface runoff (i.e., surface flow, 0-20 cm, ploughed layer) and subsurface runoff (i.e., subsurface flow, 20-60 cm, non-ploughed layer) were all monitored and evaluated from April 2018 to September 2019. Results show that, in this sloping farmland, subsurface flow was the main process of runoff and dominated N transport, but surface flow dominated P transport. The three fertilization treatments reduced the runoff erosion by surface flow, while increasing it from subsurface flow (p < 0.05). Compared with two NPK fertilizations, BF treatment significantly increased the total sediment yield, subsurface runoff flux and subsurface runoff coefficient. Among all three fertilization treatments, the differences of grain yields are found not significant (except for the 4th crop). In surface flow, biochar addition increased the loss flux of NH4+ and P fractions, but reduced the loss flux of NO3- with the comparison of the CF and OF treatments. In subsurface flow, biochar addition didn't significantly changed the runoff of N fractions, but increased P runoffs, especially for TP and PP runoffs (p < 0.05). Overall, the risk of N and P loss, and runoff erosion through sub-surface flow in biochar incorporated Entisols sloping farmland needs be highlighted.
电子版国际标准刊号	1873-2305
资助项目	National Key Research and Development Project[2017YFD0800101] ; Chongqing Technology Innovation and Application Project[cstc2018jszx-zdyfxmX0014] ; State Cultivation Base of Ecoagriculture for Southwest Mountainous Land, Southwest University, Chongqing, China
WOS关键词	SOUTHWESTERN CHINA ; PREFERENTIAL FLOW ; RUNOFF GENERATION ; NITRATE MOBILITY ; NUTRIENT LOSSES ; ORGANIC-CARBON ; SOIL-EROSION ; YIELD ; REGION ; LAND
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000540169600013
资助机构	National Key Research and Development Project ; Chongqing Technology Innovation and Application Project ; State Cultivation Base of Ecoagriculture for Southwest Mountainous Land, Southwest University, Chongqing, China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34898]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Wang Zifang; Gao Ming
推荐引用方式 GB/T 7714	Huang Rong,Gao Xuesong,Wang Fuhua,et al. Effects of biochar incorporation and fertilizations on nitrogen and phosphorus losses through surface and subsurface flows in a sloping farmland of Entisol[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2020,300:UNSP 106988.
APA	Huang Rong.,Gao Xuesong.,Wang Fuhua.,Xu Guoxin.,Long Yi.,...&Gao Ming.(2020).Effects of biochar incorporation and fertilizations on nitrogen and phosphorus losses through surface and subsurface flows in a sloping farmland of Entisol.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,300,UNSP 106988.
MLA	Huang Rong,et al."Effects of biochar incorporation and fertilizations on nitrogen and phosphorus losses through surface and subsurface flows in a sloping farmland of Entisol".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 300(2020):UNSP 106988.