Abstract:
An experiment was carried out in the Experimental Field of the Agricultural Botany
Department, Sher-e-Bangla Agricultural University, Dhaka during 2016 -2017, to assess the
effect of leaf cutting on plant growth and yield of selected BRRI released Aman varieties. The
experiment consisted of five rice varieties namely BRRI dhan32, BRRI dhan33, BRRI
dhan39, BRRI dhan62, BRRI dhan56 and two treatments viz .i.) variety, ii) leaf cutting.
RCBD with four replications was used in this experiment. Irrespective of all studied varieties,
the highest leaf length, leaf width, leaf area, plant height, leaf numbers at heading, numbers of
tillers hill
-1
, grains panicle, grain yield, straw yield, 1000 grain weight, chlorophyll content
and harvest index were obtained in no leaf cutting (control). The yield and yield contributing
characters is decreased by leaf cutting as compared to the control. Among the varieties, BRRI
dhan33 gave the significantly higher yield in control (control 6.75t ha
-1
,treated 4.75t ha
) The
highest grain yield was obtained in no leaf cutting(6.75 t ha
). Cutting of leaf led to a decline
in the number. of panicles hill
-1
-1
which eventually reduced the grain yield. The leaf cutting
(except flag leaf and penultimate leaves) reduced about 10 to 28% loss of grain yield. Besides
this, 1000 grains weight was significant reduced in leaves cut plant observed compared to that
of the control plant. Remarkable variation in grain filling duration was also noticed in the
different varieties due to leaf cutting. Reduction of grain yield was minimum (10%) in BRRI
dhan39 (control 5.75t ha
-1
,treated 5.15t ha
-1
) with leaf cutting than that of the rest varieties.
