Current Science

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We examined monthly and seasonal changes in soil CO2 flux in the grassland, bamboo and Dipterocarpus forest ecosystems of Manipur, North East India. Soil CO2 flux was recorded to be highest during rainy season and lowest during cool and dry winter season. Soil CO2 flux rate was recorded to be highest in forest followed by grassland and bamboo forest. Multiple regression revealed that up to 92% of variation in soil CO2 flux could be explained by soil moisture, soil temperature and soil organic carbon in three different ecosystems. Annual amount of CO2 flux from soil was estimated at 694.86, 671.16 and 1029.25 g C m-1 y-1 in grassland, bamboo and Dipterocarpus forest ecosystems respectively. Thus the results indicate that soil CO2 flux rate is highly influenced by seasons, environmental factors and types of vegetation in the different ecosystems of NE India.

Keywords

Multiple Regression, Soil Co2 Flux, Soil Moisture, Soil Organic Carbon, Soil Temperature.
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