Vol. 9 No. 1
Yield and soil organic carbon sequestration under organic nutrient management in rice-rice system
Author(s): D. K. BASTIA, S. TRIPATHY, T. BARIK, C. S. KAR,S. RAHA AND A. TRIPATHY
Abstract: A field experiment was carried out at Bhubaneswar during 2008-2011. The soil of the experimental site was sandy loam in texture with 6.0 pH. The bulk densities were 1.58 and 1.66 t m-3 and soil organic carbon were 5.2 and 4.0 g kg-1 of soil for 0-15 and 15-30 cm soil depth, respectively. Rice-rice cropping system was taken for three consecutive years with eight organic nutrient management and biozyme application treatments in a Randomized Block Design. Grain and above-ground biomass yield increased linearly from first to third year in both the seasons. The pooled grain, straw and total biomass yields of the system were the highest (8.1, 9.0 and 18.0 t ha-1, respectively) with GM+FYM+vermicompost in split dose+biozyme granule and power plus in kharif and FYM+vermicompost in split dose+biozyme granule and power plus in summer and were at par with those of all other biozyme applied treatments. In soil, organic carbon concentration, total soil organic carbon stock and soil organic carbon sequestration rates were also significantly influenced by the organic nutrient management and biozyme application treatments.
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