Study of spatio-temporal variations of soil salinity in the south-eastern coastal part of Bangladesh

IF 1.4 Q4 SOIL SCIENCE

Soil Science Annual Pub Date : 2022-02-17 DOI:10.37501/soilsa/144725

Sajal Roy, B. Nath, Nasrin Chowdhury

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引用次数: 0

Abstract

Soil salinity (SS) is one of many constraints to sustainable crop production in coastal areas of Bangladesh. With increasing the areas of saline soils in the south-eastern part of Bangladesh, it is of utmost importance to observe the variations in SS at a spatio-temporal scale. Therefore, this study attempted to assess the degree and extent of SS as well as the concentrations of ammonium acetate (NH4OAc) extractable and water (H2O) soluble cations along with anions using laboratory and GIS techniques. In connection with this, the middle part of Roypur Union of Anowara Upazila was divided into three different zones considering cropping intensity and location of sampling sites. The representative soil samples were collected from each zone in the pre-monsoon (April) and postmonsoon (December) periods of the year 2018. The results indicate distinct analytical and mapping differences in SS of the studied area in the pre-monsoon and post-monsoon seasons. The correlation of EC with all of the cations and anions was found positive in both seasons. Furthermore, the mean values of EC along with NH4OAc extractable and H2O soluble cations as well as anions of all the sampling sites varied signifi cantly (p<0.01). The fi ndings of this study successfully indicate the variations in degree and extent of the SS which would help in coping with the suitable crops to grow. Keywords

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孟加拉国东南沿海地区土壤盐分时空变化研究

土壤盐度(SS)是孟加拉国沿海地区可持续作物生产的诸多制约因素之一。随着孟加拉国东南部盐渍土面积的增加，在时空尺度上观察土壤水分的变化具有重要意义。因此，本研究试图利用实验室和GIS技术评估SS的程度和程度，以及乙酸铵(NH4OAc)可提取和水(H2O)可溶阳离子和阴离子的浓度。与此相关，考虑到种植强度和采样点的位置，将Anowara Upazila Roypur Union的中部划分为三个不同的区域。在2018年季风前(4月)和季风后(12月)期间从每个地区收集了具有代表性的土壤样本。结果表明，在季风前和季风后季节，研究区SS的分析和制图差异明显。在两个季节中，EC与所有阳离子和阴离子均呈正相关。此外，各采样点的EC与NH4OAc可萃取和水溶阳离子、阴离子的平均值差异极显著(p<0.01)。本研究的结果成功地说明了SS在程度和程度上的变化，这将有助于应对适宜的作物生长。关键字

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来源期刊

Soil Science Annual SOIL SCIENCE-

CiteScore

2.50

自引率

6.70%

发文量

审稿时长

29 weeks

期刊介绍： Soil Science Annual journal is a continuation of the “Roczniki Gleboznawcze” – the journal of the Polish Society of Soil Science first published in 1950. Soil Science Annual is a quarterly devoted to a broad spectrum of issues relating to the soil environment. From 2012, the journal is published in the open access system by the Sciendo (De Gruyter).