MORPHO-PHYSIOLOGICAL ATTRIBUTES AND YIELD RESPONSE OF BORO RICE TO BORON AND ZINC

Abstract

The present piece of work was carried out at the Research Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2019 to April 2020 in Boro season to investigate the morpho-physiological attributes and yield response of boro rice to boron and zinc. The experiment consisted of two factors, and followed Randomized Complete Block Design. Factor A: Boro rice varieties viz (3); V 1 : BRRI dhan29, V 2 : BRRI dhan50, V : BRRI dhan55, Factor B: Different level of boron and zinc fertilizers viz (4); F 0 3 : Control, F : Boron @ 15 kg ha -1 , F 2 : Zinc @ 20 kg ha -1 and F 3 : Boron @ 15 kg ha -1 1 + Zinc@20 kg ha . Data on different growths, yield contributing characters and yield were recorded to find out the response of boro rice varieties to different doses of zinc and boron fertilizers and different parameters of boro rice showed significant variations. Among the varieties, V (BRRI dhan29) treatment perform the best and recorded the maximum number of effective tillers hill 1 -1 (16.09), panicle length (26.72 cm), filled grains panicle

(148.45), number of total grains panicle -1 (166.19), 1000 grains weight (26.24 g), grain yield (5.92 t ha -1 ), straw yield (7.08 t ha -1 ), biological yield (12.99 t ha ) and harvest index (45.36 %). In case of different doses of zinc and boron fertilizers applications, the maximum, number of effective tillers hill -1 (17.72), panicle length (26.99 cm), filled grains panicle -1 (150.75), total grains panicle -1 (167.78), 1000 grains weight (28.39 g), grain yield (5.69 t ha -1 ), straw yield (6.54 t ha -1 ), biological yield (12.22 t ha -1 ) and harvest index (46.38 %) were recorded in F (Boron @ 15 kg/ha+ Zinc @ 20 kg/ha) treatment. In respect of treatment combinations V 3 1 F performed the best and recorded the highest grain yield (6.86 t ha -1 ). Thus BRRI dhan29 along with application of Boron @ 15 kg ha -1 + Zinc @ 20 kg ha -1 considered as a suitable treatment combination for boro rice production. 3 -1 -1 -1