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EFFECT OF SEEDLING AGE AND VARIETY ON THE YIELD AND YIELD ATTRIBUTES OF TRANSPLANTED MAIZE (Pages : 58 - 63)

MRITYUNJOY BISWAS

The experiment was conducted at the Regional Agricultural Research Station, Bangladesh Agricultural Research Institute (BARI), Jmalpur during 2002-2003 to select variety as well as to ascertain suitable seedling age for higher grain yield with reduced field duration. The treatments included in the experiments were three varieties viz. BARI maize-6, Pacific-11 and BARI hybrid maize-3 (BHM-3) assigned and six ages of seedling viz. 0 (direct seeded)-, 14-, 21-, 28-, 35- and 42-day old assigned. Seedlings were raised through mud cake nursery. Results revealed that the highest grain yields were obtained from both the varieties BHM-3 (7.88 t ha-1 ) and Pacific-11(8.17 t ha-1 ) while the lowest from BARI maize-6 (5.78 t ha-1 ). Direct-seeded crop, and 14- and 21-day old seedlings produced the highest grain yields and beyond 21-day old seedlings grain yield reduced significantly. Effects of interaction of variety and age of seedlings showed that grain yield reduced gradually beyond 21-day old seedling in all varieties. Pacific-11 with 14-day old seedling produced the highest grain yield. Pacific-11 with 0- and 21-day old seedling, and BHM-3 with 0-, 14- and 21-day old seedlings also produced statistically similar grain yields to Pacific-11 with 14-day old seedlings. The lowest grain yield was obtained from BARI maize-6 with 42-day old seedling which was statistically similar to BARI maize-6 with 35-day old seedling and Pacific-11 with 42-day old seedlings. Yield attributes like length of cob, number of cobs m-2 and grains cob-1 reduced gradually with the increment of age of seedlings which in turn produced significantly reduced grain yield in all varieties. Field duration reduced by 8-10 days with 14-day old seedlings while 13-15 days with 21-day old seedlings compared to direct seeded. Download


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