Moisture sensitivity alteration of soil organic carbon and nitrogen mineralization in Vertisol

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  • ABHIJIT SARKAR ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • ASHIS KUMAR BISWAS ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • AVIJIT GHOSH ICAR- Indian Grassland and Fodder Research Institute, Jhansi
  • PRAMOD JHA ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • MADHUMITA DAS ICAR-Indian Institute of Water Management, Bhubaneswar
  • ASHOK KUMAR PATRA ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • TRISHA ROY ICAR-Indian Institute of Soil and Water Conservation, Dehradun
  • MADHUMONTI SAHA ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • ASHOK KUMAR PATRA ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • TRISHA ROY ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • MADHUMONTI SAHA ICAR-Indian Institute of Soil Science, Bhopal 462 038, India
  • SIDDHARTHA SANKAR BISWAS ICAR-National Research Centre for Orchids, Pakyong
  • DIPAK RANJAN BISWAS ICAR-Indian Agricultural Research Institute, New Delhi


Crop residue, C- and N- mineralization, Fertilizer, Moisture sensitivity, Rate kinetics, Vertisol


Uneven distribution and intensity of rainfall in subtropical semi-arid Vertisol creates different hydro-climaticcondition due to its mineralogy and expansive type of clays. Indeed, information on impact of moisture levels onsoil C- and N-mineralization in presence of residue and recommended fertilization is scarce. Thus, this incubationexperiment was conducted at ICAR-Indian Institute of Soil Science, Bhopal during 2018–19 with four moisture, twofertilizer, and two residue levels to evaluate the effects of fertilization and residue incorporation on moisture sensitivityof soil C- and N-mineralization. Application of fertilizer induced positive priming effect for CO2-C and increased by~ 28%. Residue- and fertilizer × residue accelerated the Ccum by ~108 and 125%, respectively. Residue applicationcaused initial N-immobilization. A significant interaction was observed among fertilizer, residue and moisture contentfor both C- and N-mineralization. C-mineralization was amplified with increase in soil moisture content from 24to 40% moisture levels, but decreased at 48% moisture level. Irrespective of fertilization moisture sensitivity of Cand N mineralization was reduced by residue incorporation. But, fertilization led to highest moisture sensitivity ofN-mineralization. Thus, residue incorporation could be recommended as obligatory practice in sub-tropical Vertisolto decrease its moisture sensitivity and to maintain positive C balance and soil health.


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How to Cite

SARKAR, A., BISWAS, A. K., GHOSH, A., JHA, P., DAS, M., PATRA, A. K., ROY, T., SAHA, M., PATRA, A. K., ROY, T., SAHA, M., BISWAS, S. S., & BISWAS, D. R. (2021). Moisture sensitivity alteration of soil organic carbon and nitrogen mineralization in Vertisol. The Indian Journal of Agricultural Sciences, 91(10), 1447–1451.