Effect of Sowing Time on the Performance of Different Rice Genotypes in Konkan Climate

Abstract

A field experiment was conducted to assess the influence of sowing time on the performance of different rice genotypes in lateritic soil with low to medium soil fertility during Kharif 2013 and 2014. The experiment was laid out in split plot design with sowing time in 3 main plots and rice genotypes in 9 sub-plots resulting in 27 treatment combinations that were replicated thrice. The pooled mean of the data revealed that significantly highest grain yield was obtained in short duration hybrid Sahyadri-4 sown during 23^rd meteorological week (MW) followed by the same hybrid sown during 24th MW and medium duration variety Jaya sown during 23rdMW. However, in case of straw yield, significantly highest value was recorded by the medium duration variety Karjat-5 sown during 23rd MW followed by the same cultivar sown during 24th MW. The highest nitrogen, phosphorus and potassium content and nutrient uptake were recorded in rice sown during 23rd MW compared to other sowing times. The short duration hybrid Sahyadri-4 recorded the highest nitrogen (N), phosphorus (P), potassium (K) and total nutrient uptake in grains among the 9 genotypes, except medium duration cv. Karjat-5 having the highest total K uptake. Whereas, in straw cv. Karjat-5 recorded significantly the highest uptake of N, P and K followed by the short duration hybrid Sahyadri-4.