干旱区生态环境知识资源中心(Arid): Matching fertilization with available soil water storage to tackle the trade-offs between high yield and low N2O emissions in a semi-arid area: Mechanisms and solutions

Arid

DOI	10.1016/j.agwat.2023.108488
	Matching fertilization with available soil water storage to tackle the trade-offs between high yield and low N2O emissions in a semi-arid area: Mechanisms and solutions
	Wu, Xiaorong; Li, Junjie; Xue, Xuanke; Wang, Rui; Liu, Wenhan; Yang, Baoping; Jia, Zhikuan; Zhang, Xudong; Han, Qingfang
通讯作者	Zhang, XD ; Han, QF
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	288
英文摘要	Large fertilizer nitrogen (N) input has created favorable conditions for nitrous oxide (N2O) emissions in semi-arid areas. However, it remains to be determined whether the major contradictions between high yield and N2O emissions reduction can be reconciled by matching fertilization with water availability. A 3-year field experiment was conducted in the Loess Plateau of northwest China, monitored N2O fluxes over five N application rates (0, 120, 175, 230, and 285 kg N ha(-1)), and examined the environmental factors and crop production in a rainfed maize field. Results showed that available soil water storage at sowing (ASWS) is crucial in promoting soil N2O emissions by altering soil NO3--N, organic C, and organic N availability in semi-arid agroecosystems. The cumulative N2O emissions exponentially increased with increasing N rates. However, the cumulative N2O emissions were moderately low (1.20 kg N ha(-1)) at the N application rate of 230 kg ha(-1), where maize yield was maximized, after which N2O emissions remarkably increased by 27.88 %. This result suggests that reduced N application to levels satisfying crop needs could significantly reduce N2O emissions with a minor yield penalty. Furthermore, water availability determines the absorption and utilization of nutrients by crops on the Loess Plateau and ultimately determines grain yield. Therefore, an N2O emission-yield curve was established to determine whether the target crop yield could be obtained by adjusting water availability and N fertilization rates while reducing N2O emissions. Our results suggest that N application rates at 218.7-230.0 kg ha(-1), ensuring ASWS at 209.5-215.2 mm at sowing and precipitation within 61-90 days after sowing at 184.2-194.0 mm is ideal for matching fertilization with water availability to balancing high yield and mitigating N2O emissions in the study region.
英文关键词	Available soil water storage N availability Maize yield N2O emission-yield curve Loess Plateau
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001068416500001
WOS关键词	NITROUS-OXIDE EMISSIONS ; MICROBIAL BIOMASS ; NONLINEAR RESPONSE ; USE EFFICIENCY ; SYSTEM ; DENITRIFICATION ; PRODUCTIVITY ; COMMUNITIES ; ALTERNATION ; IRRIGATION
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395092
推荐引用方式 GB/T 7714	Wu, Xiaorong,Li, Junjie,Xue, Xuanke,et al. Matching fertilization with available soil water storage to tackle the trade-offs between high yield and low N2O emissions in a semi-arid area: Mechanisms and solutions[J],2023,288.
APA	Wu, Xiaorong.,Li, Junjie.,Xue, Xuanke.,Wang, Rui.,Liu, Wenhan.,...&Han, Qingfang.(2023).Matching fertilization with available soil water storage to tackle the trade-offs between high yield and low N2O emissions in a semi-arid area: Mechanisms and solutions.AGRICULTURAL WATER MANAGEMENT,288.
MLA	Wu, Xiaorong,et al."Matching fertilization with available soil water storage to tackle the trade-offs between high yield and low N2O emissions in a semi-arid area: Mechanisms and solutions".AGRICULTURAL WATER MANAGEMENT 288(2023).