Title: Investigation of different seed number in a hill in Dry-seed method on yield and yield components of four Rice varieties in Khuzestan
Author: Abdolali Gilani
Abstract: This study designed for reducing the seed rate of rice cultivars in dry-bed seeding and the facility of dry seeding in a hill. The experiment was carried out in a randomized complete blocks design on a split-plot with three replications for one year (2014) in Shavoor agriculture research station. Rice cultivars namely (V1- Red-Anbori, V2-Champ, V3- Daniel, and V4- Cados) were as the main plot and seed number in a hill as subplot included three levels (1, 3,5 seed). The results showed grain yield was independent of cultivar and interaction of two factors but seed number effect had a significant difference in %5 level. Grain yield increase with the change of seed number from 1 to 5 as the highest measure ( 592/5 kg/ha, %19/7) obtain from 1 to 3 but increase from 3 to 5 was (95/2 kg/ha, %1/6). In the whole of the highest grain yield (3598/3 and 3657/5 kg/ha) related to seed number 3 and 5. Total dry matter was a significant difference in %1 level among cultivars and seed number. But not was a significant difference in the interaction of the two factors. The highest and lowest dry matter (14596/5 and 9866/7 kg/ha) related to local and high yielding cultivar respectively. Daniel had the highest harvest index (%40/7) but the lowest of it related to local cultivars and Cabos. Panicle number/ m2 were different in the %5 and %1 level among cultivars and seed number respectively. But The interaction had no significant difference. With attention to results, using this planting method not only reduces seed measure sharply but also can apply as a new option for developing rice production in the province.
Keywords: Rice cultivars, Seed number, Dry bed, Grain yield