气候变化领域集成服务门户(CCPortal): Lower soil nitrogen-oxide emissions associated with enhanced denitrification under replacing mineral fertilizer with manure in orchard soils

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DOI	10.1016/j.scitotenv.2024.171192
	Lower soil nitrogen-oxide emissions associated with enhanced denitrification under replacing mineral fertilizer with manure in orchard soils
	Xu, Pinshang; Li, Zhutao; Guo, Shumin; Jones, Davey L.; Wang, Jinyang; Han, Zhaoqiang; Zou, Jianwen
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	921
卷号	921
英文摘要	Emerging evidence suggests that replacing mineral fertilizers with organic livestock manure can effectively suppress reactive gaseous nitrogen (N) emissions from soils. However, the extent of this mitigation potential and the underlying microbial mechanisms in orchards remain unclear. To address this knowledge gap, we measured nitrous and nitric oxide (N2O and NO) emissions, microbial N cycling gene abundance, and N2O isotopomer ratios in pear and citrus orchards under three different fertilization regimes: no fertilization, mineral fertilizer, and manure plus mineral fertilizer. The results showed that although manure application caused large transient peaks of N2O, it reduced cumulative emissions of N2O and NO by an average of 20 % and 17 %, respectively, compared to the mineral fertilizer treatment. Partial replacement of mineral fertilizers with manure enhanced the contribution of AOA to nitrification and reduced the contribution of AOB, thus reducing N2O emissions from nitrification. Isotope analysis suggested that the pathway for N2O production in the soils of both orchards was dominated by bacterial denitrification and nitrifier denitrification. The manure treatment reduced the ratio of denitrification products. Additionally, the dual isotope mixing model results indicated that partially replacing mineral fertilizers with manure could promote soil denitrification, resulting in more N2O being reduced. N -oxide emissions were on average 67 % higher in the pear orchard than in the citrus orchard, probably due to the differences in soil physicochemical properties and growth habits between the two orchards. These findings underscore the potential of partially replacing mineral fertilizers with organic manure in orchards to reduce gaseous N emissions, contributing to the transition towards environmentally sustainable and climate -smart agricultural practices.
英文关键词	Climate change; Greenhouse gas; Soil nitrogen cycle; Mitigation option; Climate-smart agriculture
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001196707600001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300357
作者单位	Nanjing Agricultural University; Nanjing Agricultural University; Bangor University; Murdoch University; Nanjing Agricultural University
推荐引用方式 GB/T 7714	Xu, Pinshang,Li, Zhutao,Guo, Shumin,et al. Lower soil nitrogen-oxide emissions associated with enhanced denitrification under replacing mineral fertilizer with manure in orchard soils[J],2024,921.
APA	Xu, Pinshang.,Li, Zhutao.,Guo, Shumin.,Jones, Davey L..,Wang, Jinyang.,...&Zou, Jianwen.(2024).Lower soil nitrogen-oxide emissions associated with enhanced denitrification under replacing mineral fertilizer with manure in orchard soils.SCIENCE OF THE TOTAL ENVIRONMENT,921.
MLA	Xu, Pinshang,et al."Lower soil nitrogen-oxide emissions associated with enhanced denitrification under replacing mineral fertilizer with manure in orchard soils".SCIENCE OF THE TOTAL ENVIRONMENT 921(2024).