Spatial and temporal variability in microbial activities of coastal acid saline soils of Goa, India
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Title |
Spatial and temporal variability in microbial activities of coastal acid saline soils of Goa, India
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Creator |
Mahajan GR, Manjunath BL, Latare AM, D'Souza R, Vishwakarma S, Singh NP
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Subject |
Coastal saline soils, microbial activity
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Description |
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The aim of the present investigation was to study the spatio-temporal variability of the microbial activities in coastal saline soils (locally called Khazan) of Goa, India (west coast region). The coastal soil salinity is a major constraint for reduced crop yields and abandonment of farming in these areas. Three replicated global positioning based soil samples (0–0.20 m depth) from each of four salinity groups i.e. non-saline (EC=0.08±0.06 dS m−1), weakly saline (EC=2.04±0.06 dS m−1), moderately saline (EC=3.50±0.57 dS m−1) and strongly saline (EC=5.49±0.49 dS m−1) during three seasons–monsoon, post-monsoon and pre-monsoon were collected. Soil microbial activity in terms of soil microbial carbon (MBC), MBC as a fraction of soil organic carbon (SOC) (MBC/SOC), basal soil respiration (BSR), metabolic quotient (qCO2) and soil enzyme activities–dehydrogenase, phosphatase and urease was tested. In all the seasons, the soil cationic composition depended significantly (p monsoon > during pre-monsoon season. The mean MBC and MBC/SOC of non-saline soils were 1.61 and 2.28 times higher than that of strongly saline soils, whereas qCO2 of strongly saline soils was 2.4 times higher than that of non-saline soils. This indirectly indicates the salinity stress on the soil microorganisms. Irrespective of season, the soil enzyme activities decreased significantly (p Indian Council of Agricultural Research |
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Date |
2018-11-09T05:08:13Z
2018-11-09T05:08:13Z 2015 |
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Type |
Research Paper
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Identifier |
Mahajan, G. R., Manjunath, B. L., Latare, A. M., D'Souza, R., Vishwakarma, S., and Singh, N. P.: Spatial and temporal variability in microbial activities of coastal acid saline soils of Goa, India, Solid Earth Discuss., 7, 3087-3115, https://doi.org/10.5194/sed-7-3087-2015, 2015.
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/9790 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Copernicus publication
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