EFFECT OF PLANTING TIME ON MORPHOPHYSIOLOGICAL AND YIELD CONTRIBUTING CHARACTERS OF RICE (Oryza sativa)

Abstract

The experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka at the period of December, 2014 to April 2015 to find out the effect of planting time on morphophysiological and yield contributing characters of rice. The experiment comprised of two factors. Factor A: planting time (2): T1: 24th January planting; T2: 23th February planting and Factor B: Rice variety (5): V1: BRRI dhan29; V2: BRRI hybrid 2; V3: Hera 2; V4: Tia and V5: Taj 1. The experiment was laid out in a randomized complete block design (RCBD) with three replications. In case of planting time, at 20, 40, 60, 80 DAT and harvest, the taller plant (26.58, 56.63, 83.19, 92.29 and 111.16 cm, respectively) was recorded from T1 and the shorter plant (24.64, 53.49, 78.90, 87.25 and 105.18 cm, respectively) was found from T2. The maximum shoot reserve translocation (15.26%) was recorded from T1 and the minimum (12.97%) from T2. The maximum total grains panicle-1 (86.80) was recorded from T1 and the minimum (79.80) from T2. The maximum grain yield (4.00 t ha-1) was observed from T1 and the minimum (3.53 t ha-1) from T2. For rice variety, at 20, 40, 60, 80 DAT and harvest, the tallest plant (27.88, 58.08, 84.94, 94.41 and 112.03 cm, respectively) was observed from V3, while the shortest plant (23.59, 50.38, 75.55, 82.92 and 100.93 cm, respectively) from V1 The highest shoot reserve translocation (16.84%) was observed from V3, while the lowest (10.94%) from V1. The maximum total grains panicle-1 (89.83) was observed from V3, while the minimum (67.83) from V1. The highest grain yield (4.30 t ha-1) was found from V3, while the lowest (2.95 t ha-1) from V1. Due to interaction effect, at 20, 40, 60, 80 DAT and harvest, the tallest plant (29.94, 62.57, 89.58, 99.42 and 120.92 cm, respectively) was recorded from treatment combination of T1V3 and the shortest plant (23.31, 49.56, 75.57, 82.25 and 100.92 cm, respectively) was found from of T2V1. The highest shoot reserve translocation (17.83%) was recorded from T1V3 and the lowest shoot reserve translocation (10.43%) was found from of T2V1 treatment combination. The highest total grains panicle-1 (97.33) was recorded from T1V3 and the lowest (66.00) from of T2V1 treatment combination. The highest grain yield (4.64 t ha-1) was recorded from T1V3 and the lowest grain yield (2.83 t ha-1) was recorded from of T2V1 treatment combination. Among different planting time and variety 24th January planting and Hera 2 was superior in terms of morpho-physiological, yield contributing characters and yield of rice.