INFLUENCE OF SEEDLING HEIGHT MANIPULATION AND LEAF REMOVAL ON GROWTH AND YIELD OF BRRI Dhan48

Abstract

An experiment was conducted during the period from March to August 2019 at Shere-Bangla

Agricultural University, Dhaka, Bangladesh to study the influence of leaf clipping on the growth and yield of aus rice. The experiment comprised two factors; Factors A: three different seedling clipping viz. S 0 = no seedling clipping (control), S 1

= 1/3 rd height seedling clipping and S 2 = 1/2 nd height seedling clipping and Factor B: five different leaf clipping before panicle initiation viz. L 0 = no leaf clipping (control), L 1 = Lower 1st + 2nd leaves clipping, L 2 = Lower 2nd + 3rd leaves clipping, L 3 = Lower 3rd + 4th leaves clipping and L 4 = Flag leaf clipping. The experiment was laid out in Randomized Complete Block design (RCBD) with three replications.Seedling clipping showed significant variations on all parameter except plant height. Leaf clipping treatment also showed same effect on different plant characters. Combine effect of seedling clipping and leaf clipping treatment varied growth and yield parameters significantly as well. The tallest plant (110.17 cm) was recorded from the combination of no seedling clipping and no leaf clipping. The highest number of effective tillers hill 1 (27.69) and longest panicle (35.81 cm) was obtained from the combination of 1/3

height clipping with no leaf clipping of seedlings. The maximum number of filled grains panicle −1 (157.50), 1000-grain weight (28.00 g), grain yield (4.98 t ha ) and harvest index (48.54 %) was recorded from 1/3 rd seedling clipping and no leaf clipping combination of treatment.