Effects of land-use change and fertilization on N2O and NO fluxes, the abundance of nitrifying and denitrifying microbial communities in a hilly red soil region of southern China

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 生态系统研究网络观测与模拟重点实验室 > 生态网络实验室

	Effects of land-use change and fertilization on N2O and NO fluxes, the abundance of nitrifying and denitrifying microbial communities in a hilly red soil region of southern China
	Wu, X; Liu, HF; Fu, BJ; Wang, Q; Xu, M; Wang, HM; Yang, FT; Liu, GH
刊名	APPLIED SOIL ECOLOGY
	2017
卷号	120 页码:111-120
关键词	Land-use change Fertilization Nitrous oxide Nitric oxide Ammonia oxidizers Denitrifying communities
ISSN号	0929-1393
英文摘要	Nitrous oxide (N2O) and nitric oxide (NO) are generally interrelated in soil nitrogen biogeochemical cycles. However, the effects of land-use change and fertilization on N2O and NO fluxes and the underlying mechanisms are not well understood, especially in fields converted from rice paddies (RPs) to upland cultivation. This study investigated the effects of land-use change from RPs to a citrus orchard (OR) as well as fertilization on N2O and NO fluxes, and the gene abundance of nitrifying and denitrifying microbial communities by using static chamber-gas chromatography and quantitative real-time PCR (qPCR). Structural equation modeling was performed to determine whether soil properties and the abundances of nitrifiers and denitrifiers influenced in situ N2O and NO fluxes. Land-use change from RPs to an OR and fertilization significantly increased N2O and NO fluxes. Land-use change increased AOA abundance, did not affect AOB abundance, and decreased nirK, nirS, and nosZ abundances. The growth of AOA and AOB abundance in response to fertilization was generally stimulated by providing more NH4+, but sometimes was inhibited by lower pH. Fertilization did not significantly affect the abundance of denitrifiers. Soil properties and functional microbial groups were explanatory variables, while land-use change altered their role in predicting in situ N2O and NO fluxes. For N2O fluxes, dissolved organic carbon was the strongest predictor in the RPs, whereas the primary explanatory factor was nirK abundance in the OR. For NO fluxes, soil temperature was the most important explanatory variable. Our results demonstrate the need for comprehensive approaches incorporating nitrifying and denitrifying processes to improve our understanding of biogeochemical cycles.
学科主题	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000411866600014
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43989]
专题	生态系统网络观测与模拟院重点实验室_生态网络实验室
推荐引用方式 GB/T 7714	Wu, X,Liu, HF,Fu, BJ,et al. Effects of land-use change and fertilization on N2O and NO fluxes, the abundance of nitrifying and denitrifying microbial communities in a hilly red soil region of southern China[J]. APPLIED SOIL ECOLOGY,2017,120:111-120.
APA	Wu, X.,Liu, HF.,Fu, BJ.,Wang, Q.,Xu, M.,...&Liu, GH.(2017).Effects of land-use change and fertilization on N2O and NO fluxes, the abundance of nitrifying and denitrifying microbial communities in a hilly red soil region of southern China.APPLIED SOIL ECOLOGY,120,111-120.
MLA	Wu, X,et al."Effects of land-use change and fertilization on N2O and NO fluxes, the abundance of nitrifying and denitrifying microbial communities in a hilly red soil region of southern China".APPLIED SOIL ECOLOGY 120(2017):111-120.