Varietal Improvement of Rice for Rainfed Lowland Agro-Environment of Eastern Terai
Hari Kumar Prasai1*, Rudra Bhattarai1 & Dhruba Shrestha1
1Regional Agricultural Research Station, Tarahara, Sunsari, Nepal
*Corresponding address: hkprasai60@gmail.com
Abstract
Regional varietal trial of rainfed lowland medium (RVT-RLM) rice was carried out at Regional Agricultural Research Station (RARS), Tarahara, Sunsari, Nepal in 2014 and 2015. The RVT-RLM was composed by selecting superior genotypes from coordinated varietal trials. The experiments were laid out in randomized complete block design the experiments were replicated three times in both years. Total 21 and 22 genotypes were included in experiments of 2014 and 2015 respectively. Out of the tested genotypes in 2014-15, CH-2 produced the highest grain yield (4716 kg/ha) followed by IR 82635-B-B-47-1 (4675 kg/ha). These genotypes recorded 37-39 and 2-3 percent higher grain yield than the yield of national average (3394 kg/ha ) and local check variety, Kanchhi Masuli (4589 kg/ha) respectively. These promising genotypes CH-2 and IR 82635-B-B-47-1 recorded more than 27 percent higher grain yield than the grain yield of other two standard check varieties Swarna (3678 kg/ha) and Tarahara-1 (3647 kg/ha). Maturity period of these promising genotypes were observed 136 and 125 days respectively whereas IR 74371-70-1-1, IR 8836-10-1-1-2 and IR 74371-54-1-1 were found the most early maturing (123 days) genotypes, but grain yield was 11-34 percent lower than IR 82635-B-B-47-1. The difference in days to maturity and grain yield was found significant among the genotypes and the tested years.
Keywords: RVT-RLM; grain yield; significant; kg/ha; genotype; promising.
Int. J. Grad. Res. Rev. Vol-3, Issue-1: 8-12
