ROLE OF SEEDLING NUMBER AND CHITOSAN RAW MATERIAL POWDER ON THE GROWTH AND YIELD OF BRRI dhan88

Abstract

A pot experiment was conducted under the net house of Sher-e-Bangla Agricultural University (SAU), Dhaka, Bangladesh, during November 2019 to April 2020, to investigate the improvement of late sowing. Boro seedling characters and yield by using chitosan raw material powder in seedbed soil. The experiment was consisted of two factors and following Completely Randomized Block Design (RCBD) with four replications. Factor A: Level of chitosan raw material powder(w/w) (06) viz; T 1 = 0%, T 2 = 0.1%, T 3 = 0.2%, T 4 = 0.3%, T 5 = 0.4% and T 6 = 0.5% and Factor B: Different seedling Number hill - 1 (3) viz; S 1 =Single seedling hill - 1 . S 2 = Two seedling hill and S 3 = Three seedling hill - 1 . Experimental results revealed that among different levels of chitosan raw material powder, maximum average seedling height (21.93 cm) was obtained in T (0.4 % chitosan raw material powder) treatment. Seedling treated with T 2 (0.1%) treatment perform well fresh weight seedling 5 -1 (371.33 mg), oven dry weight seedling -1 (83.337 mg), maximum seedling strength (4.65 mgcm -1 - 1 ) , grain yield pot

(69.85 g) ,

maximum harvest index (50.54 %). In case of different seedling number hill 1 , effective tillers pot -1 (22.67), first flowering (65.66), maximum grain yield pot

(65.168 g),

the maximum harvest index (49.46%) was obtained in S 1 (Single seedling hill -1 ) . In case of combined effects, The maximum grain yield pot -1 (76.27 g) was obtained in T 3 S 1 treatment combination. Chitosan raw material powder strongly improved the seedling characters at single seedling number hill -1 , yield and yield attributing characters of BRRI dhan88.Thus for cultivation of BRRI dhan88, it is suggested that optimum level (0.1%) of chitosan raw material powder could be applied in the seedbed soil along with transplanting single seedling hill -1 perform well for obtaining higher grain yield.