气候变化领域集成服务门户(CCPortal): Changes in precipitation patterns alter aggregate stability-related cations and micronutrients in a desert grassland

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DOI	10.1007/s12665-024-11557-7
	Changes in precipitation patterns alter aggregate stability-related cations and micronutrients in a desert grassland
	Zhang, Lihua; Jiang, Xiaoyu; Wang, Mengmeng; Gao, Han; Zhao, Ruifeng; Ren, Xiaotong; Wei, Xi
发表日期	2024
ISSN	1866-6280
EISSN	1866-6299
起始页码	83
结束页码	8
卷号	83 期号:8
英文摘要	Altered rainfall caused by climate change affects soil cations and aggregate stability and thus affecting the soil productivity of ecosystems. However, little is known regarding the changes of soil nutrients and aggregate stability with rainfall change in desert grassland. To investigate the effect of rainfall on the soil nutrients and aggregate stability, cations of Ca2+, Mg2+, K+, Na+ and Al3+ and micronutrients of Fe2+, Mn2+, Cu2+ and Zn2+ in bulk soil and three soil aggregate sizes classes (microaggregate, < 0.25 mm; small macroaggregate, 0.25-2 mm; large macroaggregate, > 2 mm) from rainfall manipulation (i.e., ambient rainfall amount as a control, +/- 20% and +/- 40% of ambient rainfall) were examined in a desert grassland of the western Loess Plateau. The Na+ content under extreme drought (- 40%) was significantly increased in all aggregate size classes and bulk soil and further increased effective cation exchange capacity (ECEC) in the microaggregate. Fe2+ in microaggregate under + 20% treatment was significantly increased compared to +/- 40% and CK (ambient rainfall). Although the significant differences in Mg2+, Ca2+, Mn2+, Cu2+ and Zn2+ in aggregates and bulk soil were not found among rainfall treatments, more micronutrients tended to accumulate in the small macroaggregate. Extreme drought reduced soil aggregate stability resulting from the increased soil fractal dimension (D) due to the accumulation of Na+. The contribution of large macroaggregate to cations and micronutrients in bulk soil, soil mean weight diameter (MWD) and geometric mean diameter (GMD) significantly increased with increased rainfall. In contrast, D, erodibility (K) as well as the contribution of microaggregate to nutrients in bulk soil increased with the decreased rainfall. This work highlights the importance of cations for aggregate stabilization under altered rainfall regimes in a desert grassland. Moreover, the response of micronutrients to rainfall alteration needs to be investigated in the aspect of aggregate and bulk soil.
英文关键词	Rainfall alteration; Cations; Micronutrients; Aggregate stability; Desert grassland
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001203970800003
来源期刊	ENVIRONMENTAL EARTH SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303487
作者单位	Northwest Normal University - China
推荐引用方式 GB/T 7714	Zhang, Lihua,Jiang, Xiaoyu,Wang, Mengmeng,et al. Changes in precipitation patterns alter aggregate stability-related cations and micronutrients in a desert grassland[J],2024,83(8).
APA	Zhang, Lihua.,Jiang, Xiaoyu.,Wang, Mengmeng.,Gao, Han.,Zhao, Ruifeng.,...&Wei, Xi.(2024).Changes in precipitation patterns alter aggregate stability-related cations and micronutrients in a desert grassland.ENVIRONMENTAL EARTH SCIENCES,83(8).
MLA	Zhang, Lihua,et al."Changes in precipitation patterns alter aggregate stability-related cations and micronutrients in a desert grassland".ENVIRONMENTAL EARTH SCIENCES 83.8(2024).