Influence of Varieties and Spacing on Growth, Seed Yield and Quality of Rice under Aerobic Condition

摘要

An experiment was carried out on growth parameters, seed yield and quality parameters of rice as influenced by promising varieties and spacing under aerobic condition during kharif2005 and summer 2006 at ZARS, V.C. Farm, Mandya dist. Karnataka. The mean data indicated that rice grown with a spacing of 30 x 40 cm recorded significantly the highest plant height (90.9 cm), number of tillers per hill (26.5), panicle length (19.6 cm), number of seeds per panicle (200.4), hundred seed weight (2.2 g) as compared to other spacings. Whereas, rice was grown with a spacing of 30 x 15 cm recorded significantly higher seed yield (47.2 q/ha) as compared to other studied spacings. Among different promising varieties, the variety Doddabyranellu has recorded significantly highest plant height (118.6 cm), number of tillers per hill (26.6), panicle length (22.6 cm), number of seeds per panicle (186.5), hundred seed weight (2.8 g) and seed yield (50.8 q/ha) as compared to other varieties. The interaction effect on spacing and varieties with respect to growth and yield parameters was significant influenced during both the years of experimentation. The seed quality parameters viz., seed germination (97.9 %), root length (12.9 cm), shoot length (5.2 cm) and seedling dryweight (6.2 mg) were observed significantly higher when crop was sown with a spacing of 30 x 40 cm at laboratory condition. Among different varieties, cv. Doddabyranellu recorded significantly higher seed germination (97.8 %), root length (13.2 cm), shoot length (6.2 cm) and seedling dry weight (8.9 mg) as compared other varieties. Whereas, the interaction effect on spacing and varieties with respect to quality parameters was significant in both the year of experimentation.