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Soil salinity assessment and coping strategies in the coastal agricultural landscape in Djilor district, Senegal

机译：塞内加尔迪尔郡沿海农业景观土壤盐度评估及应对策略

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摘要

Soil salinity remains one of the most severe environmental problems in the coastal agricultural areas in Senegal. It reduces crop yields thereby endangering smallholder farmers' livelihood. This paper aims to investigate soil salinity pattern and relationship with some environmental factors based on 304 soil sample plots (at 0-30 cm depth) coupled with farm household survey in Djilor district, Fatick Region. Elevation, slope, groundwater depth, and normalized difference vegetation index (NDVI) values of each sample plots were extracted using the ArcGIS. Through statistical analyses, the results showed that bare land, land under fallow, rice plots and Fluvisols (soil type) registered high content of salt. Clay content, soil pH, elevation, distance to river and Fluvisols were significant factors associated with the increased salt content. Contrary to expectations, soil salinity had no relationship with groundwater depth in the study area. Ninety-six percent of the respondents were affected by salinization. Women group engaged in rice farming appeared to be more affected by soil salinity. To cope with the negative impact of soil salinity in the study area, the farmers' strategies are the application of chemical fertilizer and manure, planting and conservation of trees, and installation of soil bunds. Smallholder farmers also expressed their need for support on adaptation and mitigation from the government or any concerned organizations involved in this environmental issue. This study provides a baseline in soil salinity assessment and helps decision makers regarding land management and salt-affected areas restoration.
机译：土壤盐度仍然是塞内加尔沿海农业领域中最严重的环境问题之一。它减少了作物产量，从而危及小农农民的生计。本文旨在研究土壤盐度模式及其基于304土壤样品图（0-30厘米深度）的环境因素的关系，加上Djilor区，蒂克地区的农场家庭调查。使用ArcGIS提取每个样品图的高程，坡度，地下水深度和归一化差异植被指数（NDVI）值。通过统计分析，结果表明，赤土，落水，稻块和氟酚（土壤型）注册了高含量的盐。粘土含量，土壤pH，海拔，距离河流和氟酚是与盐含量增加相关的重要因素。与期望相反，土壤盐度与研究区的地下水深度没有关系。百分之九十六名受访者受到盐渍化的影响。从事稻米种植的妇女组似乎受到土壤盐度的影响。为了应对研究区的土壤盐度的负面影响，农民的策略是应用化肥和粪肥，种植和养护树木的应用，以及安装土壤外滩。小农农民还需要支持政府或任何有关组织的适应和缓解的支持。本研究为土壤盐度评估提供了基线，并帮助决策者有关土地管理和影响的地区恢复。

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