Growth and yield response of direct seeded rice (Oryza sativa L.) to dates of sowing and varieties

Abstract

A field experiment was carried out at Agricultural Research Station, Dhadesugur in Karnataka during 2018-19 to study on “Response of direct seeded rice (Oryza sativa l.) to dates of sowing and varieties”. The experimental site was medium black clay soil belonging to the order vertisol with soil pH (8.10), EC (0.65 dS m-1), available nitrogen (244.60 kg ha-1), P2O5 (37.50 kg ha-1) and K2O (336.3 kg ha-1). The experiment comprised of five dates of sowing viz., D1: 2nd Fortnight of June, D2: 1st Fortnight of July, D3: 2nd Fortnight of July, D4: 1st Fortnight of August and D5: 2nd Fortnight of August and four varieties viz., V1: GGV- 05- 01, V2: RNR-15048, V3: BPT-5204 and V4: GNV-10-89. These treatments were laid out in split plot design with three replications. Data on growth and yield of each crop was recorded and statistically analyzed. The experimental results revealed that, 2nd fortnight of June is the best time of sowing for different parameters such as number of tillers per square meter (404.3), plant height (90.0 cm), leaf area index (1.74), total dry matter production (40.0 g), days to 50 per cent flowering (91.6 days), days to maturity (131.4 days), number of grains per panicle (273.8), panicle length (22.9 cm), 1000 grain weight (17.4 g), number of panicles per square meter (275.7), panicle weight (3.4 g), grain yield (6272 kg ha-1) and straw yield (7516 kg ha-1), whereas sowing on 2nd fortnight of August has given the lowest value for all the studied traits. GGV-05-01 rice variety surpassed other varieties for all the studied characters.