INFLUENCE OF TRANSPLANTING DATE ON TILLERING PATTERN AND YIELD OF HYBRID RICE VARIETIES IN BORO SEASON

Abstract

The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during November 2008 to May 2009 to evaluate the effect of transplanting dates on the tillering pattern and yield of hybrid rice varieties. The experiment comprised of three hybrid rice varieties viz., Aloron, Tia and Taj and three transplanting dates viz., 15 December, 30 December and 15 January. The experiment was laid Out in a split-plot design with transplanting date assigned to the main plot and variety to the subplot. The results showed that the maximum number of tillers hill4 was produced in Tia at all transplanting dates. Plant height at harvest, number of non-bearing tillers hilY', paiiicle length, number of total spikelets panicle4 and number of sterile spikelets panicle1 were the maximum in Taj, whereas Tia produced the maximum number of total and effective tillers hill'. Number of grains panicl&', 1000- grain weight, grain yield, biological yield and harvest index were the highest in Aloron. Plants transplanted on 15 December produced the maximum number of tillers hill4 compared to the plants transplanted on 30 December and 15 January. The values of all characters studied were the highest in 15 December, transplanting except number of non-bearing tillers hill' and number of sterile spikelets panicl&'. The highest grain and straw yields were observed from 15 December transplanting. Aloron produced the highest grain and straw yields compared to Tia in all transplanting dates. Aloron should preferably be transplanted between 15 December and 30 December for better performance.