Vol. 11, Issue 2 (2022)

Author(s):
Suraj Mali and Sanjay Tiwari

Abstract:
Sodic soils have immense productivity potential, if managed through proper technology interventions. Bio-compost and gypsum can be used to reclaim sodic soils decreased soil pH. A field experiments were carried out during June-November of 2018 & 2019 at ICAR - Indian Agricultural Research Institute, Sub Regional Station, Pusa (Samastipur), Bihar. Our objective was to study the increase potassium availability & uptake in rice genotypes under sodic soils. Experiment was laidout in split plot design with four treatments i.e. T₁ - Control, T₂ - Gypsum@100%G.R., T₃ - Gypsum@50%G.R.+Bio-compost @2.5 tha^-1 and T₄ - Biocompost@5.0 tha^-1 in main plots and ten rice genotypes G₁ - Suwasini, G₂ - Rajendra Bhagwati, G₃ - Boro-3, G₄ - Rajendra Neelam, G₅ - CSR-30, G₆ - CSR-36, G₇ - CR-3884-244-8-5-6-1-1, G₈ - CR-2851-SB-1-2-B-1, G₉ - CSR-27 and G₁₀ - Pusa-44 in sub plots and replicated thrice. The results obtained from the present investigation revealed that the mean of soil reaction (pH) of all genotypes ranged from 9.10 to 9.23 during 2018 and 9.01 to 9.11 during 2019. The mean of available potassium in all genotypes varied from 116.92 kg ha^-1 to 123.82 kg ha^-1 in the first year while in the second year it varied from 113.34 kg ha^-1 to 123.50 kg ha^-1. The potassium uptake in grain of the genotypes varied between 7.28 kg ha^-1 to 12.21 kg ha^-1 in the first year while in the second year it varied between 7.16 kg ha^-1 to 10.88 kg ha^-1. The potassium uptake in straw of the genotypes ranged from 54.13 kg ha^-1 to 71.92 kg ha^-1 in the first year while in the second year it ranged from 53.53 kg ha^-1 to 72.57 kg ha^-1.