Vol. 11 No. 1
Soil organic carbon health and yield sustainability under organically managed rice-rice sequence
Author(s): S. PRADHAN, D. K. BASTIA AND S. TRIPATHY
Abstract: A field experiment was carried out at Bhubaneswar during 2008-14. The soil of the experimental site was sandy loam in texture with 6.0 pH. The values of bulk density and soil organic carbon contents in 0-15 and 15-30 cm soil depth, respectively, were 1.58 and 1.66 tm-3 and 5.2 and 4.0 g kg-1. Rice-rice sequence was taken for six consecutive years with seven organic nutrient management treatments in randomized block design. Organic nutrient management exerted significant effect on soil organic carbon status and sustainable yield index. The observed soil organic carbon stock was maximum in treatment receiving dhanicha+ FYM+vermicompost (46.29 t ha-1) and highest rate of sequestration was also observed in the same treatment (4.00 t ha-1 year-1). Maximum average grain yield & (4.47 and 4.26 t ha–1) and highest SYI (Sustainable Yield Index) was witnessed in the same treatment in kharif (0.78) and summer (0.77) seasons respectively.
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