GROWTH AND YIELD PERFORMANCE OF BRRI dhan28 UNDER IRRIGATION AND WEED MANAGEMENT

Abstract

The experiment was conducted in the experimental area Agronomy Farm of Sher-e- Bangla Agricultural University, Dhaka during the period from November 2012 to April, 2013 in Boro season to study the effect of irrigation and weed management of BRRI dhan28. The experiment comprised of five levels of irrigation viz. I : All time available water; I 2 : Irrigation at 2 days after field drying; I : Irrigation at 4 days after field drying; I 4 : Irrigation at 6 days after field drying and I 3 : Irrigation at 8 days after field drying and three levels of weed management viz. W 0 5 : No weeding, W : Weeding at tillering stage and W : Weeding at flag leaf initiation stage. The experiment was laid out in split plot design with three replications. Data on weed population, different growth parameter and yield of rice was recorded and significant variation was observed for different treatments. The highest grain yield (5.90 t ha 2 -1 ) was observed from I 2 , whereas the lowest (4.94 t ha -1 ) was recorded from I . The highest grain yield (5.69 t ha -1 ) was recorded from W 1 , while the lowest (4.80 t ha 5 -1 1 1 ) was found from W . The highest grain yield (6.44 t ha -1 1 ) was found from I 5 W 0 ) was observed from I 2 W 1 and the lowest (3.59 t ha treatment combination. The increased yield of I was attributed due to the greater plant growth and number of field grain per panicle. 2 W 1 0