Abstract:
A field experiment was conducted at the research field of Sher-e-Bangla Agricultural
University (SAU), Dhaka. during the period from November 2009 to June 2010 to
investigate the effect of variety and date of transplanting on morpho-physiological
characters, yield attributes and yields of hybrids and inbred rice varieties in Boro
season. The experiment comprised of three hybrid varieties viz., Hira2, Moron and Tia
along with an inbred variety, BRRI dhan29, and four dates of transplanting viz.. 01, 16
and 31 January and 15 February. The experiment was laid out in two factors
randomized complete block design with three replications. The growth parameters
such as leaf area, total dry matter production and absolute growth rate, morphological
and phenological parameters, yield contributing characters and grain yield were
significantly influenced by the date of transplanting. Results revealed that leaf area,
total dry matter, absolute growth rate, plant height, straw yield, number of unfilled
grains paniele4, days required to flowering and maturity were hier when
transplanted on 01 January than those on 16. 31 January and 15 February. In contrast,
the lowest values of the parameters were recorded when transplanted on 15 February.
The maximum grain yield was recorded when transplanted in mid-January owing to
increased grains panicle' and harvest index, where as the lowest grain yield was
recorded when transplanted on 15 February due to inferiority in yield contributing
characters. Among the varieties, I-Iira2 showed superiority in leaf area (LA), and total
dry matter (1DM) production, straw yield and absolute growth rate which resulted the
superior performance of yield attributes thereby increasing grain yield. In contrast, Tia
produced the lowest grain yield for its inferior performance of yield attributes.
