Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

WEED INFESTATION AND YIELD PERFORMANCE OF BORO RICE IN DIRECT SEEDING METHOD AS INFLUENCED BY GREEN GROWTH REGULATOR AND HERBICIDES (Pages : 83 - 90)

An experiment was carried out at the experimental field of Bangladesh Institute of Nuclear Agriculture, Mymensingh, during February to May 2005 to investigate the effect of green growth regulator (GGR-6) and herbicides on weed infestation and yield performance of boro rice (cv. Iratom-24) in direct seeding method. The concentration of GGR-6 was 0 (control) and 30 ppm of aqueous solution. The herbicides were Machete 5G and Ronstar 25 EC at the rate of 25kg ha-1 and 2 litre ha-1 respectively. The green growth regulator and herbicides had positive effect on weed infestation and yield performance. GGR-6 at 30 ppm and Machete 5G under direct seeding with plant spacing 25cm x 20cm was the best for total number weeds per m-2 , number of effective tillers hill -1 , number of filled grains panicle-1 and 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 30 ppm. Interaction effect on direct seeding method, herbicides and GGR-6 on grain growth was non-significant. GGR-6 at 30 ppm 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 30 ppm 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. So it may be suggested that for enhancing yield of direct seeding method with plant spacing 20cm x 20cm, GGR-6 at 30 ppm and Machete 5G at the rate of 25kg ha-1 would be recommended in rice. Download