RASHED ALAM1*, MD. ARIFUR RAHMAN2, ROWNAK ARA RUBAIDA3, MST. SHAMSUNNAHAR4
and AMINUR RAHMAN5
1MS Student, 2Professor, 3Former MS Students, 4&5MS Student, Department of Agronomy & Agricultural Extension, University of Rajshahi, Rajshahi-6205, Bangladesh.
ABSTRACT
The experiment was conducted at the Agronomy Field Laboratory, Department of Agronomy and Agricultural Extension, Rajshahi University, Rajshahi, Bangladesh during December, 2018 to June, 2019 to study the yield of boro rice as affected by weeding and structural arrangement of seedlings. The experiment consisted of (a) three different number of weeding’s viz. no weeding, one weeding and two weeding’s (b) three types of structural arrangement of seedlings viz. (20+30) cm, (25+25) cm and (35+15) cm. Most of the yield and yield attributing characters significantly influenced by the number of weedings and structural arrangement of seedlings. Two weeding’s produced the highest, effective tillers hill-1 (9.85), number of panicle hill-1 (8.89), filled grain panicle-1 (156.00), 1000-grain weight (22.93 g) as a result the highest grain yield (4.66 tha-1) and straw yield (4.69 tha-1) were obtained from that treatment of weeding and the lowest were obtained from no weeding treatments with a few exceptions..The highest number of effective tiller hill-1 (8.96), filled grain panicle-1 (152.26), 1000-grain weight (22.82gm) as a result the highest grain yield (4.64 tha-1), straw yield (4.69 tha-1) were obtained from(25+25)cm structural arrangement of seedlings. The lowest were obtained from (20+30) cm structural arrangement of seedlings with some exception. It could be concluded that among the structural arrangement seedlings (25+25) cm gave the highest grain and straw yield which was statistically similar to (35+15) cm. The maximum grain and straw yield were observed when two weedings had done, 1st at 15 and 2nd at 30 days after transplanting.
Keywords: BRRIdhan28, Weed, Row spacing, Yield contributing characters and Production.