EFFECT OF PLANTING TIME ON MORPHO-PHYSIOLOGICAL AND YIELD ATTRIBUTES OF HYBRID RICE VARIETIES

Abstract

The experiment was carried out during the period from October 2016 to May 2017 to find out the effect of planting time on morpho-physiological and yield attributes of hybrid rice varieties at the research field in the department of Agricultural Botany, Shere-Bangla

Agricultural University, Dhaka-1207. Two planting times viz. 15 December and 15 January and five different varieties viz. Heera 4, Tia, Aloron, BRRI hybrid 3 and BRRI dhan 29 were used. The experiment was laid out in Randomized Complete Block Design with three replications. Data on different yield contributing characters and yield were recorded. Different varieties showed significant variation on different parameters. Variety, V (Heera 4) showed the best performance on plant height (93.16 cm), number of leaves hill 1 -1 (76.80), highest number of tillers hill -1 (18.37), dry weight hill (9 50.09 g), leaf length (33.97 cm), leaf breadth (1.57 cm), SPAD value (42.93), panicle length (23.75 cm), number of filled grains panicle -1 (121.30), grain yield (5.78 t ha ), straw yield (7.50 t ha -1 ), biological yield (13.26 t ha -1 ) and the highest harvest index (43.45%). The planting time, T (Transplanting at 15 December) also provided the highest plant height (98.75 cm), number of leaves hill 1 -1 (68.40), number of tillers hill -1 (15.13) and dry weight hill -1 (49.99 g), leaf length (31.94 cm), leaf breadth (1.49 cm), SPAD value (44.89), panicle length (23.51 cm),

number of filled grains panicle -1 -1 (121.42), the highest 1000 grain weight (27.12 g), the highest number of grains panicle -1 (137.33), the highest grain yield (5.63 t ha 1 -1 ), the highest straw yield (7.80 t ha ) and harvest index (41.66%). The combination of planting time, T -1

-1

), biological yield (13.43 t ha (Transplanting at 15 December) with variety, V 1 1 (Heera 4) also showed the best performance on number of tillers hill -1 (19.80), dry weight hill -1 (54.54 g), leaf length (35.10 cm), leaf breadth (1.58 cm), SPAD value (45.66) and panicle length (24.27 cm), number of filled grains panicle 1 (132.20), the highest number of grains panicle -1 (144.60), the highest grain yield (6.60 t ha -1 ), the highest straw yield (8.18 t ha -1

), the highest biological yield (14.78 t ha and the highest harvest index (44.65%).