Influence of different dates of sowing on growth, yield attributes and yield of different sorghum ( Sorghum bicolor L.) genotypes

Abstract

A field experiment was conducted at Regional Agricultural Research Station, Vijayapura, during rabi season of 2022-23, to study the response of rabi sorghum genotypes to different dates of sowing. The experiment was laid out in Randomized Complete Block Design (factorial concept) with three replications. There were sixteen treatment combinations, which consist of four sowing windows viz., II FN (fortnight) of September, I FN of October, II FN of October and I FN of November and four genotypes viz., M 35-1, CSV-29R, BJV-44, and SPV-2217. Significantly higher grain yield of 2620 kg ha-1 and fodder yield of 3958 kg ha-1 was recorded when sorghum was sown during I FN of October. Further, it was found on par with sorghum sown during II FN of October which recorded grain yield of 2486 kg ha-1 and fodder yield of 3811 kg ha-1. Similarly, significantly higher yield attributes viz., panicle length, panicle weight, grain weight per panicle and test weight were recorded with sorghum sown during I FN of October. Among different rabi sorghum genotypes, CSV-29R recorded significantly higher grain yield (2509 kg ha-1) and fodder yield (3796 kg ha-1) followed by M 35-1as compared to other genotypes. The interaction effect due to different dates of sowing and genotypes had significant influence on sorghum yield. The genotype CSV-29R when sown during I FN of October recorded significantly higher grain yield of 2989 kg ha-1 and fodder yield of 4395kg ha-1. Further combination of these treatments recorded significantly higher gross returns (`1,25,541 ha-1), net returns (`83,266 ha-1) and B: C (2.97) as compared to other treatments combinations.