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Greenhouse gas emissions in saline and waterlogged

Kaleeswari, R.K. and Bell, R.ORCID: 0000-0002-7756-3755 (2019) Greenhouse gas emissions in saline and waterlogged. Malaysian Journal of Soil sciece, 23 . pp. 183-198.

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Abstract

An experiment was conducted to study the impact of water logging and addition of organic amendments on green house gas (GHG) emissions in a saline soil. The treatments comprised of water levels maintained at three levels viz., complete saturation, 10 cm and 15 cm below the soil surface. Organic amendment at the rate of 7.5 t ha -1 was added. Gas samples were collected at periodic intervals and analysed. The results revealed that CO 2 , N 2 O and C 2 H 2 emissions were lower under a water logged condition and were found to be higher at water levels 10 cm / 15 cm below the soil surface. There was an increase in emissions from 100 to 400 mg kg -1 at 7 days after incubation (DAI). Methane emission was found to be higher in completely saturated soil. Soils at 10 cm water level and amended with the organic material registered a higher value of soil microbial biomass – C of 1320 mg kg -1. Emissions of GHG were enhanced with the addition of organic material. This suggests that lack of C substrate is the dominant limitation for GHG emissions on saline soil. Lower q CO2 values in water logged soils indicate low microbial activity

Item Type: Journal Article
Murdoch Affiliation: Agricultural Sciences
Publisher: Malaysian Society of Soil Science
Copyright: © 2019 Malaysian Society of Soil Science.
URI: http://researchrepository.murdoch.edu.au/id/eprint/51481
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