An Assessment of Organic Carbon Fractions in Paddy and Associated Non-paddy Soils of Upper Brahmaputra Valley of Assam
Keywords:Organic carbon, humic acid, fulvic acid, humin, humification, paddy soils
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 were collected. 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 kgâ»Â¹. Surface horizons of paddy soils contained lower amounts of humus C (0.255-0.330 per cent) and fulvic acid C (CFA) (0.135 â€“ 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.
â€¢ Baldock, A. and Skjemstad, O. (2008). Role of the soil matrix and minerals in protecting natural organic materials against biological attack. Article: Organic Geochemistry, 31:697-710.
â€¢ Borah, K. and Karmakar, R. (1999). Distribution of humic substances in soils under different land uses. Journal of Agricultural Science Society of NE India, 12(1):1-8.
â€¢ Bhattacharrya, T., Pal, K., Chandran, P., Mandal, C., and Telpande, B. (2008). Soil carbon storage capacity as a tool to prioritize areas for carbon sequestration. Current Science 95:482-494.
â€¢ Cai, Z. (1996). Effect of land use on organic carbon storage in soils of eastern china. Water Air Soil Pollution 91: 383 - 393.
â€¢ Cambardella, C. A. and Elliot, E. T. (1992). Particulate soil organic matter changes across grassland cultivation sequence. Soil Science Society of America Journal 56: 777-783.
â€¢ Chan, K. Y. (1997). Consequences of changes in particulate organic carbon in Vertisol under pasture and cropping. Soil Science Society of America Journal 61: 1376-1382.
â€¢ Chenu C., Rumpel C. & Lehman J. (2014). Chapter 13 â€“ Methods for studying soil organic matter: nature, dynamics, spatial accessibility, and interactions with minerals. In: Eldor A.P., ed. Soil microbiology, ecology and biochemistry. 4th ed. Oxford, UK: Elsevier.
â€¢ Genxing, P., Laosheng, W., Lianqing, L., Xuhui, Z., Gong, W. and Yvonne, W. (2008). Organic carbon stratification and size distribution of three typical paddy soils from Taihu Lake region, China. Journal of Environmental Science 20:456-463.
â€¢ Gong, Z. (1983). Pedogenesis of paddy soil and its significance in soil classification. Soil Science 135:5-10.
â€¢ Gong, Z. (1999). Soil Taxonomic classification of China: Theory, Methodology and Applications, pp 109-164. Science Press, Beijing.
â€¢ Hayes, M. and Swift, R. (1978). The Chemistry of soil organic colloids. The Chemistry of Soil Constituents. Wiley Inter- science. Chichester. 179-320.
â€¢ Karmakar, R. and Rao, A. (1999). Soils on different physiographic units in Lower Brahmaputra Valley zone of Assam. III. Humic substances. Journal of the Indian Society of Soil Science 47: 771-774.
â€¢ Kogel-Knabner, I., Amelung, W., Cao, Z., Fiedler, S. and Frenzel, P. (2010). Biogeochemistry of paddy soils. Geoderma 157:1-14.
â€¢ Lal, R. (1994). Tillage effect on soil degradation, soil resilience, soil quality and sustainability, Soil and Tillage. Research 29:1-8.
â€¢ Lal, R. (2002). Soil carbon sequestration in China through agricultural intensification, and restoration of degraded and desertified ecosystems. Land Degradation and Development 13:469-478.
â€¢ Milori, D., Martin-Neto, L., Bayer, C., Melniczuk, J. and Bagneto, V. (2002). Humification degree of soil humic acid determined by fluorescence spectroscopy. Soil Science 167:737-749
â€¢ Pan, G., Wu, L., Li, L., Zhang, X., Gong, W. and Wood, Y. (2008). Organic carbon stratification and size distribution of three typical paddy soils from Taihu Lake Region, China. Journal of Environmental Science 20(4):456-463.
â€¢ Paustian, K., Collins, H. and Paul, E. (1997). Management controls on soil organic carbon in soil organic matter in temperate agro ecosystems. Long-term experiments in North America. CRC Press, Boca Raton, FL., pp.. 15-49.
â€¢ Paul, E., Collins, H. and Leavitt, S. (2001). Dynamics of resistant soil carbon of Midwestern agricultural soils measured by naturally occurring 14C abundance. Geoderma 104:239-256.
â€¢ Richards, B. (1987). The microbiology of terrestrial ecosystems. Harlow: Longman. Pp.399
â€¢ Rudrappa, T. (1978). The analytical characteristics of humic acids extracted from Malnad soils of Karnataka, Mysore. Journal of the Indian Society of Soil Science 12: 233-238.
â€¢ Sanchez, P., Gichuru, M. and Katz, L. (1982). Organic matter in major soils of the tropical and temperate regions. In : Symposia papers I, Transactions of the 12th International Congress of Soil Science New Delhi. pp. 99-144.
â€¢ Schnitzer, M. and Khan, S. (1972). Humic substances in the environment. Marcel Dekker, Inc. New York.
â€¢ Stevenson, F. and ElIiott. E. (1989). Methodologies for assessing the quality and quantity of soil organic matter. In: Coleman, D.e., Oades, J.M. and Uehara, G., eds., Dynamics of Soil Organic Matter in Tropical Ecosystems. Honolulu, Hawaii. University of Hawaii Press. 173-199.
â€¢ Sutton, R. and Sposito, G. (2005). Molecular structure in soil humic substance: New view Environmental Science and Technology 39:9009-9016.
â€¢ Swift, R., Maylotte, R. and Hayes, M. (2017). Humin: Its composition and importance in soil organic matter. Advances in Agronomy. doi:10.1016/bs .agron.
â€¢ Velayutham, M., Pal, D. and Bhattacharyya, T. (2000). Organic carbon stock in soils of India. In: Global climatic change and tropical ecosystems. Lal, R.; Kimble, J.M. and Stewart, B.A.(eds.).Lewis publishers, Boca Raton, F.L., pp.71-79.
â€¢ Wang, P., Liu, Y., Li, L., Cheng, K., Zheng, J., Zhang, X., Zheng, J., Joseph, S., Pan, G. (2015). Long-term rice cultivation stabilizes soil organic carbon and promotes soil microbial activity in a salt marsh derived soil chronosequence. Scientific reports, 5, 15704. doi:10.1038/srep15704
â€¢ Wang, R., Filley, T., Xu, Z., Wang, X., Li, M., Zhang, Y. and Jiang, Y.(2014) Coupled response of soil carbon and nitrogen pools and enzyme activities to nitrogen and water addition in a semi-arid grassland of Inner Mongolia. Plant Soil. ; 381(1â€“2):323â€“336. doi: 10.1007/s11104-014-2129-2.
â€¢ Willet, I. (1979). The effects of flooding for rice culture on soil chemical properties and subsequent maize growth. Plant Soil 52:373-383.
â€¢ Yan,B. and Hou, Y. (2018). Soil chemical properties at different toposequence and fertilizers under continous rice production â€“ A review. IOP Conf. Ser.: Earth Environmental Sci. 170 032107
â€¢ Zhao, C. (1996). Effect of land use on organic carbon storage in soils in eastern China. Water Air Soil Pollution 91: 383-393.
â€¢ Zhang, M. and He, Z. (2004). Long term changes in organic carbon and nutrients of an Ultisol under rice cropping in south east China, Geoderma 118: 167 - 179.
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