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The driving factors and buffering mechanism regulating cropland soil acidification across the Sichuan Basin of China

文献类型：期刊论文

作者Li, Aiwen2; Li, Chengji2; Zhang, Yuanyuan2; Deng, Qian2; Fang, Hongyan2; Zhao, Bin3; Ran, Min2; Song, Liangying2; Xue, Jingling2; Tao, Qi2
刊名CATENA
出版日期2023
卷号220页码:11
关键词Sichuan Basin Cropland soil acidification Soil buffering capacity Precipitation Fertilization Crop production
ISSN号0341-8162
DOI10.1016/j.catena.2022.106688
通讯作者Wang, Jingting(wangjt@cib.ac.cn) ; Li, Qiquan(liqq@lreis.ac.cn)
英文摘要Cropland soil has a higher acidification risk, with the driving factors and the soil buffering capacity controlling the degree of soil acidification. However, the relative importance of the main driving factors at broad geographic scales remains unclear, and the evidence on the acid-buffering process is rarely examined by large-scale observations. Using 4101 soil samples obtained in 1980s and 4348 soil samples collected in 2010s, this study explored topsoil pH changes of cropland across the Sichuan Basin of China and identified the relative importance of the main affecting factors. The results showed that topsoil pH (20 cm) has decreased by an average of 0.30 units (p < 0.001). Spatially, soil pH decline mainly occurred in the periphery of the Sichuan Basin where the initial pH (1980s) were less than 7.5. The magnitudes of soil pH decline were positively correlated with precipitation, base cation removal by crops and nitrogen fertilizer rates. Precipitation was identified as the most important factor in driving soil acidification. Moreover, the soil pH decrease was primarily buffered by soil carbonates and secondarily by soil CEC, and this study identified a critical level of 36.76 g kg(-1) for soil carbonates, above which the acid-buffering capacity was mainly provided by soil carbonates, otherwise by soil CEC. These findings emphasize the importance of formulating precipitation-based optimizing agronomic management practices for preventing or mitigating cropland soil acidification, and also provide a regional observation-dependent evidence for the changing acid-buffering process during the soil acidification process.
WOS关键词PURPLE HILLY AREA ; NITROGEN DEPOSITION ; SOUTHWEST CHINA ; ORGANIC-CARBON ; FERTILIZATION ; MANAGEMENT ; PH ; SYSTEMS ; PREDICTION ; NUTRIENT
资助项目Natural Science Foundation of Sichuan Province, China[2022NSFSC0104] ; National Natural Science Foundation of China[41930647] ; National Natural Science Foundation of China[41971358]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:000877815900003
出版者ELSEVIER
资助机构Natural Science Foundation of Sichuan Province, China ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/186372]  
专题中国科学院地理科学与资源研究所
通讯作者Wang, Jingting; Li, Qiquan
作者单位1.Univ Southern Calif, Spatial Sci Inst, Los Angeles, CA 90089 USA
2.Sichuan Agr Univ, Coll Resources, Chengdu 611130, Peoples R China
3.Sichuan Agr Univ, Coll Environm Sci, Chengdu 611130, Peoples R China
4.Chinese Acad Sci, Chengdu Inst Biol, Key Lab Environm & Appl Microbiol, Chengdu 610041, Peoples R China
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
6.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China
7.Minist Nat Resources, Key Lab Invest & Monitoring Protect & Utilizat Cul, Chengdu 611130, Peoples R China
推荐引用方式
GB/T 7714		 Li, Aiwen,Li, Chengji,Zhang, Yuanyuan,et al. The driving factors and buffering mechanism regulating cropland soil acidification across the Sichuan Basin of China[J]. CATENA,2023,220:11.
APA Li, Aiwen.,Li, Chengji.,Zhang, Yuanyuan.,Deng, Qian.,Fang, Hongyan.,...&Li, Qiquan.(2023).The driving factors and buffering mechanism regulating cropland soil acidification across the Sichuan Basin of China.CATENA,220,11.
MLA Li, Aiwen,et al."The driving factors and buffering mechanism regulating cropland soil acidification across the Sichuan Basin of China".CATENA 220(2023):11.

入库方式： OAI收割

来源：地理科学与资源研究所

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