气候变化领域集成服务门户(CCPortal): The contrasting effects of biochar and straw on N2O emissions in the maize season in intensively farmed soil

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DOI	10.1007/s11356-021-12722-2
	The contrasting effects of biochar and straw on N2O emissions in the maize season in intensively farmed soil
	Liu, Xingren; Tang, Zhanming; Zhang, Qingwen; Kong, Weidong
通讯作者	Liu, XR (通讯作者)
发表日期	2021
ISSN	0944-1344
EISSN	1614-7499
起始页码	29806
结束页码	29819
卷号	28 期号:23
英文摘要	This study evaluated the combined effects of biochar and straw on N2O flux and the community compositions of nitrifiers and denitrifiers in the maize season in an intensively farmed area in northern China. The experiment consisted of four treatments: (1) CK (only chemical fertilizer application); (2) C (biochar application); (3) SR (straw application to the field); and (4) C+SR (the application of both biochar and straw). The results indicated that during the maize growing season, N2O flux decreased by 30.3% in the C treatment and increased by 13.2% and 37.0% in the SR and C+SR treatments compared with CK, respectively. NO3--N, NH4+-N, and microbial biomass carbon (MBC) were the main soil factors affecting N2O flux, and they were positively correlated with NO3--N and negatively correlated with MBC in the C treatment and positively correlated with NH4+-N in the SR and C+SR treatments. Both biochar addition and straw return shifted the community compositions of nitrifiers and denitrifiers. N2O production was mainly reduced by promoting the ammonia-oxidizing bacteria (AOB) gene abundance and inhibiting the nirK gene abundance in the C treatment but promoted by inhibiting the AOB and nosZ gene abundances in the SR and C+SR treatments. Nitrosospira (AOB) and Rhizobium (nirK) were the main contributors among the treatments. NO3--N, NH4+-N, and MBC were the main soil factors affecting the denitrifier communities. The predominant species associated with the nirK, nirS, and nosZ genes were positively correlated with NO3--N and MBC and negatively correlated with NH4+-N. These results provide valuable information on the mechanism of N2O production and reduction in biochar- and straw-amended soil under field conditions.
英文关键词	Biochar; Straw return; Nitrifiers; Denitrifiers
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000616913700007
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260176
推荐引用方式 GB/T 7714	Liu, Xingren,Tang, Zhanming,Zhang, Qingwen,et al. The contrasting effects of biochar and straw on N2O emissions in the maize season in intensively farmed soil[J]. 中国科学院青藏高原研究所,2021,28(23).
APA	Liu, Xingren,Tang, Zhanming,Zhang, Qingwen,&Kong, Weidong.(2021).The contrasting effects of biochar and straw on N2O emissions in the maize season in intensively farmed soil.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,28(23).
MLA	Liu, Xingren,et al."The contrasting effects of biochar and straw on N2O emissions in the maize season in intensively farmed soil".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 28.23(2021).