Abstract:
An experiment was carried out at the Agronomy Field, Sher-e-Bangla Agricultural
University. Dhaka during the period from November 2009 to July 2010 to study the
effect of variety and cutting height of main crop plants on the performance of ratoon
horo
rice. Four cutting heights were (0.15.30 and
45
cm) and four varieties ( BRRI
hybrid dhan-l. BRRI dhan28, BRRI dhan36 and BRRI dhan45) were tested. Variety had
significant effect on almost all the crop characters like plant height, total number of
tillers per hill, number of effective tillers per hill, number of non-effective tillers per
hill, panicle length, days to panicle initiation, number of grains per panicle, number of
sterile spikelets per panicle, total number of spikelets per panicle, days to maturity.
1000-grain weight. grain weight per hill, grain yield, straw yield. and harvest index in
the ratoon crop. BRRI dhan28, BRRI dhan36 showed greater ratoon yields (1.8 t/ha and
1.79t/ha). Likewise cutting height also had significant effect on plant height, number
of effective tillers per hill, number of non-effective tillers per hill, panicle length. days
to panicle initiation, number of sterile spikelets per panicle, total number of spikelets
per panicle. 1000-grain weight, grain yield, straw yield and harvest index. Cutting
height Of 30 to 45 cm showed higher yields (1.7-1.69 tlha).Grain yield was highest at
30 cm cutting height of BRRI dhan28 and the second highest grain yield were at 30
cm cutting height of BRRI dhan36. All of the crop characters in the ratoon crop were
significantly affected by the interaction of variety and cutting height of main crop.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in Partial fulfillment of the requirements for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
