Influence of Sea Water Ingression on Carbon Sequestration in Soils Under Coastal Agro-ecosystems of Eastern India

被引：0
作者：
Shovik Deb
Biswapati Mandal
P. B. S. Bhadoria
机构：
[1] Uttar Banga Krishi Viswavidyalaya,Department of Soil Science and Agricultural Chemistry
[2] Bidhan Chandra Krishi Viswavidyalaya,Agricultural and Food Engineering Department
[3] Indian Institute of Technology Kharagpur,undefined
来源：
Agricultural Research | 2020年 / 9卷
关键词：
Soil salinity; SOC enrichment; Physical occlusion; Chemical recalcitrance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Coastal agro-ecosystem covers a good part of Earth’s land cover, and the recent global warming-related sea-level rise may further extend its coverage. We assessed the ability of such agro-ecosystem for stocking organic C. To reveal the reasons thereof, soils were collected from three ecologies along east coast of India. It was observed that soils that experienced occasional visits by sea water were a better niche for organic C. Formation of bigger-sized soil aggregates that occlude organic C and protect it from microbial oxidation, migration of organic C towards relatively recalcitrant pools by attachment of its de-protonated –COO groups onto soil mineral surfaces, besides subdued microbial activity due to salinity, contributed longer persistence to organic C and thus its enrichment in coastal soils. Results suggested that occasional visits of salt-laden sea water to coastal agro-ecosystem might curb C loss from soils and thus CO2 loading in the atmosphere and hence the phenomenon of global warming.
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页码：622 / 630
页数：8
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