干旱区生态环境知识资源中心(Arid): Relationship between soil 15N natural abundance and soil water content at global scale: Patterns and implications

Arid

DOI	10.1016/j.catena.2022.106879
	Relationship between soil 15N natural abundance and soil water content at global scale: Patterns and implications
	Lai, Xiaoming; Zhu, Qing; Castellano, Michael J.; Zan, Qilin; Liao, Kaihua
通讯作者	Zhu, Q
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	222
英文摘要	Investigating the relationship between the natural abundance of soil nitrogen stable isotope (815N) and soil water content (SWC) in the globe can help to explain the different controls of soil 815N in different regions, yet this was few concerned on. Based on the Craine et al. (2015) summarized soil 815N data (https://doi. org/10.1038/srep08280), and the satellite retrieved SWC in 910 grids (size of 0.1 degrees x 0.1 degrees) of the globe, an upward-concave relationship between soil 815N and SWC was observed. Higher soil 815N existed at both the dry and wet ends (i.e., respectively below and above the intermediate range of SWC, which was about 0.20-0.30 m3/ m- 3(-\|-)). Inconsistent relationships in five Ko center dot ppen-Geiger climate zones constituted this upward-concave rela-tionship. Positive relationship between soil 815N and SWC in the Tropical zone determined the increasing trend of soil 815N at the wet end in the globe. This can be explained by the increased hydrologically regulated soil N losses with the increase of SWC under the warm and moist condition. Negative relationship in the Arid zone determined the decreasing trend at the dry end in the globe. Increased abiotic N losses like ammonia volatili-zation and proportion of N supplement through bedrock weathering (higher 815N) with the decrease of SWC under the dry, hot and infertile soil condition may be the main reasons. In addition, poor relationships between soil 815N and SWC in the Temperate, Cold and Polar zones constituted the transition range of the upward -concave relationship in the globe. This reflected that not hydrologically but climatically determined low soil N losses was responsible for the low soil 815N in these zones. These findings can help to deepen our un-derstandings on the spatial pattern of soil 815N and the indicated N cycle at the global scale.
英文关键词	Nitrogen cycle Nitrogen isotope Soil815N Soil water content Spatial pattern
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000921045800001
WOS关键词	ISOTOPIC COMPOSITION ; NITROGEN DEPOSITION ; MOISTURE-CONTENT ; DELTA-N-15 ; TEMPERATURE ; CYCLE ; MINERALIZATION ; NITRIFICATION ; TERRAIN ; CLIMATE
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395670
推荐引用方式 GB/T 7714	Lai, Xiaoming,Zhu, Qing,Castellano, Michael J.,et al. Relationship between soil 15N natural abundance and soil water content at global scale: Patterns and implications[J],2023,222.
APA	Lai, Xiaoming,Zhu, Qing,Castellano, Michael J.,Zan, Qilin,&Liao, Kaihua.(2023).Relationship between soil 15N natural abundance and soil water content at global scale: Patterns and implications.CATENA,222.
MLA	Lai, Xiaoming,et al."Relationship between soil 15N natural abundance and soil water content at global scale: Patterns and implications".CATENA 222(2023).