International Congress on Biotechnology and Food Sciences
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Accepted Abstracts

An Assessment of Organic Carbon Fractions in Paddy and Associated Non-Paddy Soil of the Brahmaputra Valley of Assam

ZA Phillips* and RM Karmakar
University of Guyana, Guyana

Citation: Philips ZA, Karmakar RM (2020) An Assessment of Organic Carbon Fractions in Paddy and Associated Non-Paddy Soil of the Brahmaputra Valley of Assam. SciTech BioTech-Food Sciences 2020. Thailand

Received: February 24, 2020         Accepted: February 28, 2020         Published: February 28, 2020

Abstract

An investigation was carried out to study the soil organic carbon fractions in paddy and associated non-paddy soils of Assam, India. Three districts viz. Sivasagar, Jorhat and Golaghat in the Brahmaputra valley of Assam were selected for this study. Soil samples were collected from six profiles, three each from mono-cropped paddy and associated non-paddy areas. Horizon -wise, soil samples were analyzed for organic carbon fractions. Organic carbon, Humus C, Humin C, Humic acid C and Fulvic acid C were all analyzed from the samples. Organic carbon content in soil varied from 0.90 -7.90g kg⁻¹. Surface horizons of paddy soils contained lower amounts of humus C (0.255-0.330 per cent) and fulvic acid C (CFA) (0.135 – 0.180 per cent) and higher amounts of humin carbon (0.210 -0.475 per cent) and humic acid C (CHA) (0.120-0.150 per cent) as compared to that of non-paddy soils (0.300-0.435 and 0.195-0.300, 0.180-0.490 and 0.105-0.135 per cent respectively). It was concluded that the ratio of (CHA+CFA)/CTOC indicated less humification on the surface horizons of paddy soils. This is a direct result of prolonged submergence which led to humic acid carbon becoming less oxidized or humified.
 
Keywords: Organic carbon, Humic acid, Fulvic acid, Humin, Humification, Paddy soils