Correlation of Weather Parameters with Different Phenophases of Groundnut (Arachis hypogaea L.) during Different Sowing Windows

Abstract

A field experiment was conducted to assess the performance of groundnut genotypes under different sowing windows during rabi season under ICAR-AICRP on groundnut at Zonal Agricultural and Horticultural Research Station, Hiriyur during 2023-24. The experiment was laid out in strip plot design with three replications consisting of three sowing windows as vertical factor and four varieties as horizontal factor. The influences of weather parameters on various critical stages of groundnut were distinct Pod and dry matter yields of groundnut sown on 48th MW and 52nd was higher compared to early sowings. Correlation analysis between weather parameters and seed yield at different phenophases of groundnut indicated that maximum temperature (r=0.468**), minimum temperature (r = 0.384*), cumulative bright sunshine hours (r = 0.405*) and cumulative pan evaporation(r=0.502**) from pod development to physiological maturity stage had significantly positive relationship with seed yield. On the other hand, minimum temperature (r = -0.519**), minimum relative humidity (r = -0.431**), maximum relative humidity (r = -0.378*) and wind speed (r = -0.473**) from pegging to pod development stage had a significantly negative relationship with seed yield. The correlation of seed yield with growth and yield parameters has shown significantly higher positive relationship i.e., number of pods per plant (r = 0.879), weight of pods per plant (r = 0.811), 100 seed test weight (r = 0.926), significantly positive relationship with plant height (r = 0.652), total dry matter per plant (r = 0.708) and leaf area per plant (r = 0.812).