干旱区生态环境知识资源中心(Arid): Fertile islands beneath three desert vegetation on soil phosphorus fractions, enzymatic activities, and microbial biomass in the desert-oasis transition zone

Arid

DOI	10.1016/j.catena.2022.106090
	Fertile islands beneath three desert vegetation on soil phosphorus fractions, enzymatic activities, and microbial biomass in the desert-oasis transition zone
	Gao, Yanju; Tariq, Akash; Zeng, Fanjiang; Sardans, Jordi; Zhang, Zhihao; Islam, Waqar; Xu, Mengqi; Penuelas, Josep
通讯作者	Tariq, A ; Zeng, FJ
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	212
英文摘要	Desertification poses a perpetual threat to the security of desert ecosystems. Perennial desert vegetation plays a crucial role in maintaining the structure and function of a desert ecosystem and slowing down its desertification process by creating fertile islands beneath their canopy. Yet, how these fertile islands affect the transformation of soil phosphorus (P) fractions and the relationship between soil P fractions and enzymatic activities or microbial biomass beneath differing plant species and across soil depths still remains uncertain. Here we collected and analyzed soil P fractions (Hedley P pools), enzymatic activities (alkaline phosphatase [ALP] and beta-gluco-sidase), microbial biomass carbon (MBC), nitrogen (MBN), and phosphorus, in addition to other soil properties, beneath three typical perennial species (Alhagi sparsifolia, Karelinia caspia, Tamarix ramosissima) and in interspace area soils over a 0-100 cm soil profile, under the desert-oasis transition zone of hyper-arid and soil P -impoverished. We found that soil P fractions, especially soil labile-P, soil enzymatic activities, soil water content (SWC), NH4+-N and NO3--N concentration were closely related to the soils beneath canopy than interspace area. Soil depth and plant species also significantly affected soil labile-P and other soil properties, with the highest being topsoil beneath the canopy. Soil labile-P increased substantially beneath the canopy and was positively related to the activities of ALP and beta-glucosidase and the concentrations of soil MBC and MBN, while negatively related to SWC and electrical conductivity. We also observed that the fertile island effect was generally consistent with canopy size and ranked as follows: T. ramosissima > K. caspia > A. sparsifolia. This comprehensive field study advances our current understanding of the transformation of soil P fractions vis-`a-vis the fertile island effect in desert ecosystems, which could be useful for mitigating desertification by improving soil protection and greening the desert landscape.
英文关键词	Desert ecosystems Desertification Fertile islands Hedley P Soil depths
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000790439400003
WOS关键词	NITROGEN MINERALIZATION ; GROUNDWATER DEPTHS ; TAMARIX-CHINENSIS ; ORGANIC-CARBON ; FOREST SOILS ; LAND-USE ; PLANT ; SHRUBS ; HETEROGENEITY ; WATER
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/2XILL650/392083
推荐引用方式 GB/T 7714	Gao, Yanju,Tariq, Akash,Zeng, Fanjiang,et al. Fertile islands beneath three desert vegetation on soil phosphorus fractions, enzymatic activities, and microbial biomass in the desert-oasis transition zone[J],2022,212.
APA	Gao, Yanju.,Tariq, Akash.,Zeng, Fanjiang.,Sardans, Jordi.,Zhang, Zhihao.,...&Penuelas, Josep.(2022).Fertile islands beneath three desert vegetation on soil phosphorus fractions, enzymatic activities, and microbial biomass in the desert-oasis transition zone.CATENA,212.
MLA	Gao, Yanju,et al."Fertile islands beneath three desert vegetation on soil phosphorus fractions, enzymatic activities, and microbial biomass in the desert-oasis transition zone".CATENA 212(2022).