YIELD COMPONENTS AND YIELD OF WHEAT (Triticum aestivum L.) VARIETIES AS INFLUENCED BY PLANTING DATE

From October 2009 to March 2010, an experiment was conducted at the Agronomy Field of Bangladesh Agricultural University (BAU), Mymensingh, to investigate the effect of planting date on yield components and yield of four wheat seed varieties. The trial included four planting dates: 10 November, 20 November, 30 November, and 10 December, as well as four wheat varieties: BARI Gom 24, BARI Gom 23, BARI Gom 22, and BARI Gom 21. The experiment was set up in a three-replication randomised full block design. Wheat grain yield and yield component characteristics were investigated. In terms of yield and most plant characters, the effect of variety and planting date was significant, according to the findings. BARI Gom 23 had the best grain yield (3.84 t ha-1) among the four wheat types, owing to its greater number (5.83) of effective tillers plant-1, whereas BARI Gom 21 had the lowest grain yield (3.12 t ha-1). The maximum grain yield (3.89 t ha-1) was obtained from 10 November plantingi.e early November, owing to the highest number (22.17) of spikelets spike-1 and heavier (48.13 g) 1000 grain weight. On the other hand, the 10 December planting had the lowest grain yield (3.41t ha-1). On most plant features and yield component parameters of wheat, the interaction impact of planting date and variety exhibited considerable differences. The results of the experiment showed that all four types yielded more grain when planted on November 10 than when planted on the other dates employed in the study, and that BARI Gom 23 yielded the most grain (3.91 t ha-1) of the four varieties.

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