EFFECT OF TRANSPLANTING DATES ON GROWTH AND YIELD OF AROMATIC RICE VARIETIES

Abstract

The experiment was conducted at experimental farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207 during the period from July to December, 2018 with a view to study the effect of transplanting dates on the growth and yield of aromatic rice varieties. The experiment consisted of two levels of treatments viz. (A) Two varieties- BRRI dhan34 and Chinigura; (B) Four transplanting dates: 14th, 21th, 28th August and 4th September 2018. The experiment was laid out in Randomized Complete Block Design with three replications. Varietal effect was significant based on all the recorded agronomic parameters whereas transplanting dates had little effect on plant height, number of total tillers hill -1 , dry matter production, filled grain panicle -1 , grain yield (t ha -1 ), straw yield (t ha -1 ), biological yield (t ha ) and harvest index (%) of the crop. Combined effect showed significant variation on the growth and yield parameters like plant height, number of total tillers hill , dry matter production (g hill -1 ), number of effective tillers hill -1 , panicle length and weight, number of filled and unfilled grains panicle -1 -1 , grain yield (t ha ), straw yield (t ha -1 ), biological yield (t ha -1 ) and harvest index (%). Between two varieties, BRRI dhan34 produced the highest grain yield (3.12 t ha ), number of effective tillers hill -1 (16.67), number of filled grains panicle -1 (147.35) while Chinigura produced highest plant height (125.94 cm), dry matter production (136.12 g) and straw yield (8.98 t ha -1 ). As a variety, the lowest performance in terms of growth and yield-contributing characters, except straw yield, was recorded in Chinigura transplanted on 4th September. Among the interaction treatments, the 21th August showed the highest grain yield (3.92 t ha ) for BRRI dhan34. 21th August is appeared as a suitable time for transplanting of aromatic rice in transplanted aman season in Bangladesh.