干旱区生态环境知识资源中心(Arid): Variation of soil amino acid pools and N-hydrolysis potential in arid lands

Arid

DOI	10.1111/ejss.13432
	Variation of soil amino acid pools and N-hydrolysis potential in arid lands
	Khosrozadeh, Sajedeh; Khalili, Banafshe; Nourbakhsh, Farshid
通讯作者	Khalili, B
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	Identification of the patterns through which potential rates of proteolysis and ammonification are affected by key edaphic and climatic factors offer a powerful avenue for elucidating the potential of nitrogen (N) cycle processes in arid terrestrial ecosystems. Here, we aimed to investigate how the tradeoff between soil properties and climatic factors govern amino acids and the nitrogen cycling enzyme traits in steppe biomes. We analysed changes in amino acid pools and protease and amidohydrolase activities along arid and semi-arid climate gradients over time. The biome edaphic factors (site) were found to have significant (p < 0.001) effects on all enzyme activities, while climatic factors (time) showed significant (p < 0.001) effects on protease, L-glutaminase, and L-asparaginase activities. Over the sites and times, the soil moisture (%) explained 20%-27% of the variation in protease, L-glutaminase, and L-asparaginase activities. Soil-free amino acid concentrations were observed to be significantly affected by site (p < 0.05). The aliphatic and polar amino acid pools, however, were the only soil-free amino acid pools that significantly varied with time (p < 0.05). Pools of aliphatic and polar amino acids were significantly negatively correlated with soil moisture (r = -0.55, p < 0.05). These results find that the soil N dynamics in arid ecosystems might dramatically depend dramatically on edaphic factors and plant litter properties, and changes in soil pH, electrical conductivity, clay content, total soil organic carbon and total soil and litter N maybe even more important than the soil moisture, although sensitivity to edaphic factors were found to vary with a pathway and time of sampling. Thus, the information on N pools and N-hydrolysis potential could be useful in linking climatic-soil factors with arid ecosystem N fluxes.
英文关键词	amidohydrolase amino acid pools climatic factors edaphic factors protease soil N cycling
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001109096100001
WOS关键词	ENZYME-ACTIVITY ; NITROGEN ; DROUGHT ; TEMPERATURE ; PHYSIOLOGY ; FOREST ; CARBON ; CYCLE
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/2XILL650/396338
推荐引用方式 GB/T 7714	Khosrozadeh, Sajedeh,Khalili, Banafshe,Nourbakhsh, Farshid. Variation of soil amino acid pools and N-hydrolysis potential in arid lands[J],2023,74(6).
APA	Khosrozadeh, Sajedeh,Khalili, Banafshe,&Nourbakhsh, Farshid.(2023).Variation of soil amino acid pools and N-hydrolysis potential in arid lands.EUROPEAN JOURNAL OF SOIL SCIENCE,74(6).
MLA	Khosrozadeh, Sajedeh,et al."Variation of soil amino acid pools and N-hydrolysis potential in arid lands".EUROPEAN JOURNAL OF SOIL SCIENCE 74.6(2023).