气候变化领域集成服务门户(CCPortal): Real-time monitoring of nitrate in soils as a key for optimization of agricultural productivity and prevention of groundwater pollution

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DOI	10.5194/hess-23-3997-2019
	Real-time monitoring of nitrate in soils as a key for optimization of agricultural productivity and prevention of groundwater pollution
	Yeshno E.; Arnon S.; Dahan O.
发表日期	2019
ISSN	1027-5606
起始页码	3997
结束页码	4010
卷号	23 期号:9
英文摘要	Lack of real-time information on nutrient availability in cultivated soils inherently leads to excess application of fertilizers in agriculture. As a result, nitrate, which is a soluble, stable, and mobile component of fertilizers, leaches below the root zone through the unsaturated zone and eventually pollutes the groundwater and other related water resources. Rising nitrate concentration in aquifers is recognized as a worldwide environmental problem that contributes to water scarcity. The development of technologies for continuous in situ measurement of nitrate concentration in soils is essential for optimizing fertilizer application and preventing water resource pollution by nitrate. Here we present a conceptual approach for a monitoring system that enables in situ and continuous measurement of nitrate concentration in soil. The monitoring system is based on absorbance spectroscopy techniques for direct determination of nitrate concentration in soil porewater without pretreatment, such as filtration, dilution, or reagent supplementation. A new analytical procedure was developed to improve measurement accuracy while eliminating the typical measurement interference caused by soil dissolved organic carbon. The analytical procedure was tested at four field sites over 2 years and proved to be an effective tool for nitrate analysis when directly applied on untreated soil solution samples. A soil nitrate-monitoring apparatus, combining specially designed optical flow cells with soil porewater-sampling units, enabled, for the first time, real-time continuous measurement of nitrate concentration in soils. Real-time, high-resolution measurement of nitrate concentration in the soil has revealed the complex variations in soil nitrate concentrations in response to fertigation pattern. Such data are crucial for optimizing fertilizer application and reducing pollution potential of groundwater. © Author(s) 2019.
语种	英语
scopus关键词	Agriculture; Aquifers; Fertilizers; Groundwater pollution; Groundwater resources; Hydrogeology; Monitoring; Nitrates; Organic carbon; Productivity; Soil moisture; Soil surveys; Absorbance spectroscopy; Agricultural productivity; Application of fertilizers; Continuous measurements; Dissolved organic carbon; Fertilizer applications; High-resolution measurements; Soil nitrate concentrations; Soil pollution; agricultural production; concentration (composition); fertilizer application; groundwater pollution; monitoring; nitrate; nutrient availability; pollution control; real time; vadose zone; water resource
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159598
作者单位	Yeshno, E., Department of Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben-Gurion University of Negev, Midreshet Ben-Gurion, 84990, Israel; Arnon, S., Electrical and Computer Engineering Department, Ben-Gurion University of Negev, Beer Sheva, 8410501, Israel; Dahan, O., Department of Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben-Gurion University of Negev, Midreshet Ben-Gurion, 84990, Israel
推荐引用方式 GB/T 7714	Yeshno E.,Arnon S.,Dahan O.. Real-time monitoring of nitrate in soils as a key for optimization of agricultural productivity and prevention of groundwater pollution[J],2019,23(9).
APA	Yeshno E.,Arnon S.,&Dahan O..(2019).Real-time monitoring of nitrate in soils as a key for optimization of agricultural productivity and prevention of groundwater pollution.Hydrology and Earth System Sciences,23(9).
MLA	Yeshno E.,et al."Real-time monitoring of nitrate in soils as a key for optimization of agricultural productivity and prevention of groundwater pollution".Hydrology and Earth System Sciences 23.9(2019).