Evaluation of Pre Released Rice (Oryza sativa L.) Genotypes under Different Sowing Dates in Rainy Season

摘要

Field experiments were conducted to evaluate the pre released rice genotypes under different sowing windows on clay soils of agricultural research station, Kunaram, Telangana state, India during two consecutive rainy seasons of 2018 and 2019.The experiment was laid out in strip plot design with three replications. The treatments comprised of three sowing dates i.e. 20thJune, 5~(th)July and 20~(th)July in horizontal factor and four genotypes i.e. KNM 733, RNR 15048, KNM 1638 and KNM 118 in vertical factor. The pooled data results indicated that, among the genotypes the genotype KNM 1638 sown on 5~(th) July recorded maximum growth parameters and highest grain yield (7455 kg ha~(-1)) and followed by sown on 20~(th) June. In respect of economics of treatment combinations, the highest net returns (Rs.75,326 ha~(-1)), gross returns (Rs.1,35,326 ha~(-1)) and B:C (2.26) ratio were obtained when rice crop was sown during 5~(th) July with the? genotype KNM1638 and followed by sown on 20~(th) June with the? genotype KNM 1638.