干旱区生态环境知识资源中心(Arid): Potash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture

Arid

DOI	10.1038/s41598-020-60365-z
	Potash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture
	Buvaneshwari, Sriramulu; Riotte, Jean; Sekhar, Muddu; Sharma, Amit Kumar; Helliwell, Rachel; Kumar, M. S. Mohan; Braun, J. J.; Ruiz, Laurent
通讯作者	Buvaneshwari, S
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2020
卷号	10 期号:1
英文摘要	Incipient groundwater salinization has been identified in many arid and semi-arid regions where groundwater is increasingly used for irrigation, but the dominant processes at stake in such context are yet uncertain. Groundwater solutes originates from various sources such as atmospheric inputs, rock dissolution and fertilizer residues, and their concentration is controlled by hydrological processes, in particular evapotranspiration. Here, we propose a deconvolution method to identify the sources and processes governing the groundwater Chloride concentration in agricultural catchments, using the relative variations of Sodium and Chloride and using a neighbouring pristine catchment as a reference for the release rate of Na by weathering. We applied the deconvolution method to the case of the Kabini Critical Zone Observatory, South India, where groundwater was sampled in 188 farm tubewells in the semi-arid catchment of Berambadi and in 5 piezometers in the pristine catchment of Mule Hole. In Berambadi, groundwater composition displayed a large spatial variability with Cl contents spanning 3 orders of magnitude. The results showed that the concentration factor due to evapotranspiration was on average about 3 times more than in the natural system, with higher values in the valley bottoms with deep Vertisols. Linked with this process, large concentration of Chloride originating from rain was found only in these areas. At the catchment scale, about 60 percent of the Chloride found in groundwater originates from fertilizer inputs. These results show that Potassium fertilization as KCl is an important source of groundwater salinization in semi-arid context, and stress that identifying dominant drivers is crucial for designing efficient mitigation policies.
类型	Article
语种	英语
开放获取类型	Green Accepted, Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000563054000018
WOS关键词	CHEMICAL-WEATHERING FLUXES ; ZONE COMBINED INFLUENCE ; CHLORIDE-MASS-BALANCE ; WATERSHED MULE HOLE ; COASTAL AQUIFER ; SILICATE ROCKS ; SOIL-SALINITY ; RATES ; RECHARGE ; VEGETATION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325845
作者单位	[Buvaneshwari, Sriramulu; Sekhar, Muddu; Kumar, M. S. Mohan] Indian Inst Sci, Bangalore, Karnataka, India; [Buvaneshwari, Sriramulu; Riotte, Jean; Sekhar, Muddu; Sharma, Amit Kumar; Kumar, M. S. Mohan; Ruiz, Laurent] Indian Inst Sci, Indo French Cell Water Sci, Bangalore, Karnataka, India; [Riotte, Jean; Braun, J. J.; Ruiz, Laurent] UPS, UMR GET, CNRS, IRD, Toulouse, France; [Ruiz, Laurent] AGROCAMPUS OUEST, INRAE, UMR SAS, Rennes, France; [Sharma, Amit Kumar] Univ Rennes, UMR LETG, CNRS, Rennes, France; [Buvaneshwari, Sriramulu; Helliwell, Rachel] James Hutton Inst, Aberdeen, Scotland; [Buvaneshwari, Sriramulu] Indian Inst Sci, ICWaR, Bangalore, Karnataka, India
推荐引用方式 GB/T 7714	Buvaneshwari, Sriramulu,Riotte, Jean,Sekhar, Muddu,et al. Potash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture[J]. French National Research Institute for Sustainable Development,2020,10(1).
APA	Buvaneshwari, Sriramulu.,Riotte, Jean.,Sekhar, Muddu.,Sharma, Amit Kumar.,Helliwell, Rachel.,...&Ruiz, Laurent.(2020).Potash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture.SCIENTIFIC REPORTS,10(1).
MLA	Buvaneshwari, Sriramulu,et al."Potash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture".SCIENTIFIC REPORTS 10.1(2020).