Impact of elevated tropospheric ozone on soil C, N and microbial dynamics of winter wheat

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Impact of elevated tropospheric ozone on soil C, N and microbial dynamics of winter wheat
	Jones, Scott B.; Hu, Enzhu; Yuan, Zaijian; Zhang, Hongxing; Zhang, Weiwei; Wang, Xiaoke; Wang, Nana
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2018-02-01
卷号	253 页码:166-176
关键词	Elevated ozone Carbon dioxide Nitrous oxide Denitrifying enzymes Soil water content
ISSN号	0167-8809
文献子类	Article
英文摘要	Tropospheric O-3 can impact soil systems mediated by changing root biomass and exudates. This study investigated how elevated O-3 alters soil CO2 and N2O emissions from a winter wheat field. Winter wheat (Triticwn aestivum L.) were fumigated using elevated O-3 concentration (EO3) and using ambient air within open-top chambers during 2015 and 2016. Soil CO2 and N2O emissions were measured using a static closed-chamber technique. Rhizosphere soils were collected to determine dissolved organic carbon (DOC) content, ammonium nitrogen (NH4+-N) and nitrate-nitrogen (NO3--N) concentrations, microbial biomass carbon (MBC) and nitrogen (MBN), and activities of nitrate reductase (NR), nitrite reductase (NiR) and hydroxylamine reductase (HR). Moreover, volumetric soil water content (theta(v)) was monitored and plant dry biomass was quantified. The EO3 treatment exhibited decreased CO2 and increased N2O emissions from winter wheat soil. Soil NH4+-N, NO3--N, NR and NiR increased under EO3, whereas DOC, MBC, MBN and HR decreased. Soil 61, was higher under EO3 before irrigation, due to reduced transpiration. Elevated O-3 decreased soil CO2 flux potentially due to reduced root biomass and associated carbon input. It increased N2O fluxes apparently through enhanced de nitrification due to greater substrate availability and soil theta(v), despite the inhibition of nitrification-related routes.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40574]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Jones, Scott B.,Hu, Enzhu,Yuan, Zaijian,et al. Impact of elevated tropospheric ozone on soil C, N and microbial dynamics of winter wheat[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2018,253:166-176.
APA	Jones, Scott B..,Hu, Enzhu.,Yuan, Zaijian.,Zhang, Hongxing.,Zhang, Weiwei.,...&Wang, Nana.(2018).Impact of elevated tropospheric ozone on soil C, N and microbial dynamics of winter wheat.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,253,166-176.
MLA	Jones, Scott B.,et al."Impact of elevated tropospheric ozone on soil C, N and microbial dynamics of winter wheat".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 253(2018):166-176.