EFFECT OF VARIETY AND SOWING DATES ON THE GROWTH AND YIELD OF WHEAT

Abstract

Fhe experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar. Dhaka during the period from November 2013 to March 2014 to find out the effect of variety and sowing dates on the growth and yield of wheat. The experiment comprised of two factors; Factor A: Variety (4); Vi: BARI Gom 21.V2: BARI Gom 23, V3: BARI Gom 25, V4: BARI Gom 26 and Factors B: Sowing date (4)-Si: Sowing at 10 November, 52: Sowing at 20 November, S3: Sowing at 30 November, 54: Sowing at 10 December, 2013. The experiment was laid out in a split plot design with three replications. In case of wheat varieties, at 30, 45, 60, 75 DAS and at harvest, the tallest plant (27.86. 60.91, 87.32, 95.98 and 102.38 cm, respectively) was found from V2, while the shortest plant (25.68, 56.75, 81.58, 90.46 and 95.90 cm, respectively) was recorded from V3. The highest number of spikelets spike' (21.24), the highest grain yield (3.72 t haf 1 ) and the highest straw yield (5.32 t ha') was recorded from V2, the lowest number of spikelets spike-' (19.49), the lowest grain yield (3.26 t h ad) and the lowest straw yield (4.73 ha') was recorded from V3. For different sowing dates, at 30. 45. 60, 75 DAS and at harvest, the longest plant (28.18. 61.21, 86.62. 97.79 and 104.71 cm, respectively) was observed from S2, whereas the shortest plant (25.32, 55.62, 81.14. 88.56 and 92.17 cm, respectively) was found from S1. '[he highest number of spikelets spike' (2 I .10), the highest grain yield (3.77 t ha') and the highest straw yield (5.61 t ha4 ) was observed from 52. the lowest number of spikelets spike' (19.36). the lowest grain yield (3.12 t ha') and the lowest straw yield (4.16 t ha1 ) was found from 54. l)ue to the interaction ctThct of wheat varieties and sowing dates, at 30, 45, 60, 75 DAS and at harvest, the longest plant (29.97, 63.89, 89.42. 98.78 and 108.32 cm, respectively) was observed from V2S2 and the shortest plant (22.36, 54.14, 80.92, 84.15 and 88.17 cm, respectively) was obtained from the treatment combination V3S4. The highest number of spikelets; spike' (22.23), the highest grain yield (3.94 t ha") and the highest straw yield (5.88 t ha') was observed from V2S2, whereas the lowest number of spikelets spike' (18.80), the lowest grain yield (3.04 t ha') and the lowest straw yield (3.88 ha1 ) was obtained from the treatment combination V354. BARI (lom 23 and sowing on 20 November was the best in wheat cultivation