EFFECT OF SOWING DATES ON GROWTH AND YIELD PERFORMANCE OF SOME SELECTED WHEAT (Triticwn aestivum L) GENOTYPES

Abstract

The experiment was carried out at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during November 2009 to March 2010 to observe the effect of sowing dates on growth and yield performance of some selected wheat genotypes. The experiment comprised of two factors, viz. Factor A: Sowing dates (4 sowing dates) - Sowing on 17 November, 2009: Sowing on 30 November, 2009: Sowing on 15 December, 2009 and Sowing on 30 December. 2009 and Factor B: Wheat genotypes (9 wheat genotypes)- BAW-1064. Sourab, 4  Prodip, Fang-60. Gourab. Sufi. Shatabdi. Pavan-76 and Bijoy. The experiment was laid out in Two Factor Randomized Complete Block Design (RCBD) with three replications. Data on different yield contributing characters and yield were recorded and significant variation was recorded for sowing dates, wheat genotypes and their interaction effect. At 30, 40. 50. 60 DAS and harvest the longest plant (45.09 cm. 66.40 cm, 82.56 cm. 86.20 cm and 89.83 cm) was recorded from sowing on 30 November. 2009 and the shortest plant (40.7$ cm, 59.51 cm. 74.99 cm, 77.87 cm and 80.65 cm) from sowing on 30 December, 2009. The highest grain yield hi1 (3.64 ton) was found from sowing 30 November. 2009, whereas the lowest (3.15 ton) was recorded from sowing 30 December, 2009. At 30, 40, 50, 60 DAS and harvest the longest plant (45.36 cm, 66.34 cm, 82.77 cm. $6.84 cm and 90.50 cm) was obtained from Gourab, whereas the shortest plant (40.70 cm. 61.20 cm. 76.44 cm. 79.57 cm and 81.64 cm) was recorded from Bijoy. The highest grain yield ha (3.67 ton) was found from Sourab and the lowest (3.10 ton) was observed from 13i joy. At 30, 40. 50. 60 DAS and harvest the longest plant (49.41 cm. 71.85 cm, 89.72 cm. 94.24 cm and 98.36 cm) was observed in sowing on 30 November. 2009 x Gourab, again the shortest plant (39.37 cm, 56.89 ciii. 71.63 cm. 73.79cm and 76.31 cm) was recorded from sowing on 30 December. 2009 x Bijoy. The highest grain yield hi' (4.15 ton) was found from sowing on 30 November. 2009 c Sourab. whereas the lowest (2.85 ton) from sowing on 30 December, 2009 x Shatabdi. The variety Gourab provided better and steady yield in case of first, second and third sowings whereas. Gourab and BAW-1064 provided better yield when sown on 30 November. However, the yield was reduced in case of all the varieties when sown on 30 December.