干旱区生态环境知识资源中心(Arid): Cultivation increased soil potential denitrification rates by modifying denitrifier communities in desert-oasis ecotone

Arid

DOI	10.1111/ejss.13425
	Cultivation increased soil potential denitrification rates by modifying denitrifier communities in desert-oasis ecotone
	Wang, Lisha; He, Zhibin; Wang, Chuan; Chen, Longfei; Yang, Rong
通讯作者	He, ZB
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
ISSN	1351-0754
EISSN	1365-2389
出版年	2023
卷号	74 期号:6
英文摘要	Oases soils in northwestern China are used widely for agricultural production, but low soil moisture and fertility necessitate high volumes of irrigation and fertilization, with significant losses of water via evaporation and nitrogen via denitrification. The dynamics of denitrifying communities and their responses to potential denitrification rate (PDR) in continuously irrigated oases remain unclear. In this study, we examined the dynamics of nirK and nirS denitrifying communities in three distinct areas, an old oasis field (OOF, 54 years of cultivation), a young oasis field (YOF, 20 years) and an adjacent uncultivated sandy land (USL, 0 years), and used the partial least squares path model (PLS-PM) to predict how and to what extent soil properties and denitrifying communities may be responsible for changes in PDR. Our findings indicate that cultivation, compared with the USL treatment, improved soil structure and fertility and increased the abundance and diversity of denitrifying microbes, resulting in a further elevation of soil PDR in YOF and OOF. Additionally, our analysis highlights the potential dominance of the nirK gene in denitrification. PLS-PM revealed that soil chemical properties and microbial biomass indirectly affected soil PDR by regulating the abundance and diversity of nirK and nirS genes. Conversely, soil physical properties had a direct negative impact on PDR. Alterations in PDR were, in part, attributed to changes in abundance, richness and beta-diversity, but not correlated with changes in alpha-diversity. Notably, the standardized total effect demonstrated that the denitrifier community exhibited greater responsiveness to changes in PDR than did soil properties. Overall, our findings suggest that denitrifying communities may play a more important role than soil properties in PDR, and an increased understanding of denitrifying communities allows PDR prediction during conversion of oasis to cultivated land.
英文关键词	cultivation denitrification rate denitrifying community desert-oasis region Illumina Miseq sequencing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001114735900001
WOS关键词	HEXI CORRIDOR ; DIVERSITY ; ABUNDANCE ; FOREST ; MICROORGANISMS ; NITRIFICATION ; MANAGEMENT ; CONVERSION ; GRASSLAND ; EVOLUTION
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396339
推荐引用方式 GB/T 7714	Wang, Lisha,He, Zhibin,Wang, Chuan,et al. Cultivation increased soil potential denitrification rates by modifying denitrifier communities in desert-oasis ecotone[J],2023,74(6).
APA	Wang, Lisha,He, Zhibin,Wang, Chuan,Chen, Longfei,&Yang, Rong.(2023).Cultivation increased soil potential denitrification rates by modifying denitrifier communities in desert-oasis ecotone.EUROPEAN JOURNAL OF SOIL SCIENCE,74(6).
MLA	Wang, Lisha,et al."Cultivation increased soil potential denitrification rates by modifying denitrifier communities in desert-oasis ecotone".EUROPEAN JOURNAL OF SOIL SCIENCE 74.6(2023).