Soil N2O and NOx emissions are directly linked with N-cycling enzymatic activities

doi:10.1002/mbo3.778

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

	Soil N2O and NOx emissions are directly linked with N-cycling enzymatic activities
	Pu, Yulin 1,2,3; Zhu, Bo1,2 ; Dong, Zhixin1 ; Liu, Yun1 ; Wang, Changquan 3; Ye, Chun 3
刊名	APPLIED SOIL ECOLOGY
	2019-07-01
卷号	139 页码:15-24
关键词	N cycling Reactive nitrogen Enzyme activities Dynamic changes Greenhouse gas emissions Fertilization regimes
ISSN号	0929-1393
DOI	10.1002/mbo3.778
通讯作者	Zhu, Bo(bzhu@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	Manure application and crop residue returning have been performed to enhance crop yield and reduce soil reactive nitrogen (N-r) gas (N2O and NOx) emissions. However, the dynamic characteristics of soil nitrogen-cycling (N-cycling) enzyme activities, and the relationship among N-cycling enzyme activities, N-r contents and N-r gas emissions are not clearly understood. Six fertilization regimes, including control (CK-no fertilizer), synthetic N fertilizer alone (N), synthetic nitrogen, phosphorus and potassium fertilizer (NPK), pig manure (OM), pig manure (30% of N rate) with synthetic NPK (70% of N rate) (OMNPK), and crop residues (20% of N rate) with synthetic NPK (80% of N rate) (CRNPK), were used for 11 years to form stable soil conditions. The total N application rate in each fertilization regime, except CK, is the same (130 kg N ha(-1)) in the winter wheat season. The results showed that the cumulative emissions of N2O plus NOx in OM increased significantly by 43.7%, while those in OMNPK and CRNPK decreased by 8.2 and 15.3% compared to conventional fertilization regimes of NPK. The long-term application of manure or returning crop residues to partly replace synthetic N fertilizer may significantly enhance soil hydrolase activities compared with NPK at most stages of wheat growth. In contrast to OM, OMNPK and CRNPK primarily inhibited the activities of nitrate reductase (NR) and nitrite reductase (NiR) but increased hydroxylamine reductase (HyR) activity. Redundancy analysis (RDA) and stepwise multiple linear regression showed positive NR and NiR activities, while PRO activity is negative for N2O emission. NOx emissions were mainly controlled by HyR activities. Thus, soil reactive nitrogen (N-r) gas emissions may be mitigated by different fertilization regimes through the regulation of soil enzyme activities. Fertilization regimes, such as manure application and returning crop residues with synthetic NPK, could be recommended as optimal N fertilization strategies in Regosols to mitigate N-r gas emissions.
资助项目	National Key Research & Development Program[2017YFD0200105] ; National Natural Science Foundation of China[41330744] ; National Natural Science Foundation of China[41371301]
WOS关键词	NITROUS-OXIDE EMISSIONS ; NITRATE REDUCTASE-ACTIVITY ; WHEAT CROPPING SYSTEM ; SICHUAN BASIN ; HILLSLOPE CROPLAND ; FERTILIZER ; NUTRIENT ; DENITRIFICATION ; BIOCHAR ; REGION
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000464649200003
资助机构	National Key Research & Development Program ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/25920]
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	Zhu, Bo
作者单位	1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China;; 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China;; 3.Sichuan Agr Univ, Coll Resources Sci & Technol, Chengdu 611130, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Pu, Yulin,Zhu, Bo,Dong, Zhixin,et al. Soil N2O and NOx emissions are directly linked with N-cycling enzymatic activities[J]. APPLIED SOIL ECOLOGY,2019,139:15-24.
APA	Pu, Yulin,Zhu, Bo,Dong, Zhixin,Liu, Yun,Wang, Changquan,&Ye, Chun.(2019).Soil N2O and NOx emissions are directly linked with N-cycling enzymatic activities.APPLIED SOIL ECOLOGY,139,15-24.
MLA	Pu, Yulin,et al."Soil N2O and NOx emissions are directly linked with N-cycling enzymatic activities".APPLIED SOIL ECOLOGY 139(2019):15-24.