Empirical model and variability of soil salinity in the coastal zone of Bangladeshv
Soil salinity expressed by electrical conductivity is a threat to crop production. The study aims were to establish relationships of electrical conductivity with its relevant soil properties, and analyze variability of soil salinity in the coastal zone of Bangladesh. A total of 150 geo-referenced sa...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Federation of Eurasian Soil Science Societies
2019-04-01
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| Series: | Eurasian Journal of Soil Science |
| Subjects: | |
| Online Access: | http://ejss.fesss.org/10.18393/ejss.541344 |
| _version_ | 1797723639860166656 |
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| author | Md. Shahadat Hossain GKM Mustafizur Rahman Md. Saiful Alam HA Mashuk Md. Mizanur Rahman |
| author_facet | Md. Shahadat Hossain GKM Mustafizur Rahman Md. Saiful Alam HA Mashuk Md. Mizanur Rahman |
| author_sort | Md. Shahadat Hossain |
| collection | DOAJ |
| description | Soil salinity expressed by electrical conductivity is a threat to crop production. The study aims were to establish relationships of electrical conductivity with its relevant soil properties, and analyze variability of soil salinity in the coastal zone of Bangladesh. A total of 150 geo-referenced saline soil samples from three coastal districts (Khulna, Satkhira and Bhola) of Bangladesh were analyzed for electrical conductivity of saturated paste extract (ECe), salt cations and other soil properties related to salinity. Statistical and geostatistical analyses were done as required. Moderate to strong significant regression relationships (R2=0.42 to 0.94) were found between ECe and salt cations (ECe=43.12*Na2-46.36*Na+13.97; ECe=12.26*K-2.5;ECe=1.16*Ca-1.97; ECe=0.32*Mg2-1.60*Mg+3.53) of the soils. On the contrary, weak relationships (R2=0.05 to 0.21) were found between ECe and other soil properties (ECe=4.41*organic carbon-0.56; ECe=-1.71*Txw (soil texture)+3.98;ECe=0.35*cation exchange capacity-1.98; ECe=0.06*specific surface area-0.55). Khulna soils (CV=65.99%) showed lower statistical variations while Satkhira (CV=97%) and Bhola (CV=105%) soils showed higher statistical variations for ECe. In contrast, Khulna, Satkhira and Bhola soils showed strong, moderate and weak spatial dependency for ECe, respectively. Interpolated spatial distribution maps of ECe showed variations in individual districts of study areas. The findings would assist soil scientists or farm managers to understand and/or manage saline soils, specially the soils of coastal zone of Bangladesh. |
| first_indexed | 2024-03-12T10:04:40Z |
| format | Article |
| id | doaj.art-b2437a3757fb482897928d62af35e0c9 |
| institution | Directory Open Access Journal |
| issn | 2147-4249 2147-4249 |
| language | English |
| last_indexed | 2024-03-12T10:04:40Z |
| publishDate | 2019-04-01 |
| publisher | Federation of Eurasian Soil Science Societies |
| record_format | Article |
| series | Eurasian Journal of Soil Science |
| spelling | doaj.art-b2437a3757fb482897928d62af35e0c92023-09-02T11:21:43ZengFederation of Eurasian Soil Science SocietiesEurasian Journal of Soil Science2147-42492147-42492019-04-018214415110.18393/ejss.541344Empirical model and variability of soil salinity in the coastal zone of BangladeshvMd. Shahadat Hossain0GKM Mustafizur Rahman1Md. Saiful Alam2HA Mashuk3Md. Mizanur Rahman4Department of Soil Science, Sylhet Agricultural University, Sylhet, BangladeshDepartment of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, BangladeshDepartment of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, BangladeshDepartment of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, BangladeshDepartment of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, BangladeshSoil salinity expressed by electrical conductivity is a threat to crop production. The study aims were to establish relationships of electrical conductivity with its relevant soil properties, and analyze variability of soil salinity in the coastal zone of Bangladesh. A total of 150 geo-referenced saline soil samples from three coastal districts (Khulna, Satkhira and Bhola) of Bangladesh were analyzed for electrical conductivity of saturated paste extract (ECe), salt cations and other soil properties related to salinity. Statistical and geostatistical analyses were done as required. Moderate to strong significant regression relationships (R2=0.42 to 0.94) were found between ECe and salt cations (ECe=43.12*Na2-46.36*Na+13.97; ECe=12.26*K-2.5;ECe=1.16*Ca-1.97; ECe=0.32*Mg2-1.60*Mg+3.53) of the soils. On the contrary, weak relationships (R2=0.05 to 0.21) were found between ECe and other soil properties (ECe=4.41*organic carbon-0.56; ECe=-1.71*Txw (soil texture)+3.98;ECe=0.35*cation exchange capacity-1.98; ECe=0.06*specific surface area-0.55). Khulna soils (CV=65.99%) showed lower statistical variations while Satkhira (CV=97%) and Bhola (CV=105%) soils showed higher statistical variations for ECe. In contrast, Khulna, Satkhira and Bhola soils showed strong, moderate and weak spatial dependency for ECe, respectively. Interpolated spatial distribution maps of ECe showed variations in individual districts of study areas. The findings would assist soil scientists or farm managers to understand and/or manage saline soils, specially the soils of coastal zone of Bangladesh.http://ejss.fesss.org/10.18393/ejss.541344Geostatisticselectrical conductivitymaprelationshipsoil property |
| spellingShingle | Md. Shahadat Hossain GKM Mustafizur Rahman Md. Saiful Alam HA Mashuk Md. Mizanur Rahman Empirical model and variability of soil salinity in the coastal zone of Bangladeshv Eurasian Journal of Soil Science Geostatistics electrical conductivity map relationship soil property |
| title | Empirical model and variability of soil salinity in the coastal zone of Bangladeshv |
| title_full | Empirical model and variability of soil salinity in the coastal zone of Bangladeshv |
| title_fullStr | Empirical model and variability of soil salinity in the coastal zone of Bangladeshv |
| title_full_unstemmed | Empirical model and variability of soil salinity in the coastal zone of Bangladeshv |
| title_short | Empirical model and variability of soil salinity in the coastal zone of Bangladeshv |
| title_sort | empirical model and variability of soil salinity in the coastal zone of bangladeshv |
| topic | Geostatistics electrical conductivity map relationship soil property |
| url | http://ejss.fesss.org/10.18393/ejss.541344 |
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