Green Global
Foundation Journal
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Papers
EFFECT OF GREEN GROWTH REGULATOR AND HERBICIDES ON THE DRY MATTER PARTITIONING AND YIELD OF BARO RICE IN DIRECT SEEDING METHOD (Pages : 23 - 32)
H.P. ROY, M.R. ISLAM, S.PERVIN, R. ISLAM, and B.AKTERAn experiment was carried out at the experimental field of Bangladesh Institute of Nuclear Agriculture, Mymensingh, during the period from February to May 2005 to investigate the effect of green growth regulator (GGR?6) and herbicides on the dry matter partitioning and yield contributing characters of Boro rice (cv. Iratom? 24) in direct seeding method. The concentration of GGR?6 was 0 (control) and 30ppm of aqueous solution. The herbicides were Machete 5G and Ronstar25 EC at the rate of 25 kg ha ?1 and 2 litre ha ?1 respectively. The green growth regulator and herbicides had positive effect on dry matter partitioning and yield contributing characters. GGR?6 at 30ppm and Machete 5G under direct seeding with plant spacing 25cm x 20cm was the best for ,dry weight of leaves hill ?1 , dry weight of stem hill ?1 , total dry matter, number of filled grains panicle ?1 while 1000? grain weight were non?significant.. The highest grain growth rate was found from direct seeding with plant spacing 25cm x 20cm and GGR?6 at 30ppm. Interaction effect on direct seeding method, herbicides and GGR?6 on grain growth was non?significant. GGR?6 at 30ppm and Machete 5 G under direct seeding method with plant spacing 20cm x 20cm possessed better yield contributing characters resulted in the highest grain yield (5.87 t ha ?1 ). GGR?6 at 30ppm and Machete 5G under direct seeding with plant spacing 25cm x 20cm possessed the 2nd highest grain yield (5.41 t ha ?1 ). The broadcasting of seeds produced the least yield (2.30 t ha ?1 ) in all treatments. From the present study, it may be concluded that for enhancing yield of direct seeding method with plant spacing 20cm x 20cm, GGR?6 at 30ppm and Machete 5G at the rate of 25kg ha ?1 would be recommended in rice cultivation. Download