EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON GROWTH, YIELD AND QUALITY OF AROMATIC RICE IN BORO SEASON

Abstract

The present investigation ent it led “Effect of organic and inorganic fertilizers on growth, yield and quality of aromatic rice in boro season” was conducted from December 2018 to June 2019 at the Research Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. The experiment was done mainly to show the performance of some selected aromatic rice varieties in boro season under organic and inorganic fertilizer. The experiment comprised of two factors; viz. Factors A: Two fertilization methods - Organic fertilizer (T 1 ) and Inorganic fertilizer (T 2 ) and Factor B: Six different aromatic rice varieties (Chiniatop 1, Katari2, Dulabhog (BR-5), Zirabhog, BRRI dhan34 and BRRI dhan50). The experiment was laid out in a Split Plot Design with three replications and 12 treatment combinations. Different treatment combinations expressed significant differences due to their interaction effect on morphological, physiological, yield contributing traits, yield and grain quality parameters. Considering the variety the tallest plant (149.4 cm), highest number of total tillers hill -1 1 (13.49), highest number of leaves hill -1 (13.62), highest effective tillers hill (25.33), highest leaf area index (3.42), highest SPAD reading (47.52), highest Stomatal conductance (0.59 mmolCO 2 ), highest number of total dry matter (19.52 g), highest number of total spikelet panicle (209.5), highest number of filled spikelet panicle -1 (189.0), maximum grain size (15.90 mg), highest grain yield (3.20 t ha -1 ), highest straw yield (6.24 t ha -1 ), highest biological yield (9.44 t ha -1 ), highest harvest index (34.81%) were found in Chiniatop1 variety and maximum ineffective tillers hill -1 (1.52), maximum unfilled spikelet panicle (40.10) and maximum grain sterility percentage (34.39%) were found in Zirabhog variety. Again considering the fertilizer application organic fertilizer was showed better performance than inorganic fertilizer. Considering both variety and fertilizer used, the tallest plant (149.5 cm), the highest number of total tillers hill -1 (14.55), highest effective tillers hill (12.43), highest number of leaves hill -1 (26.87), highest total dry mater (22.37 g), highest leaf area index (3.44), highest SPAD reading (48.53), highest stomatal conductance (0.53 m mol CO 2 m -2 s -1 ), highest total spikelet panicle -1 m -2 -1 s -1 -1 -1 (231.6), highest filled spikelet panicle

(213.10), highest grain size (16.33 mg), highest grain yield (4.38 t ha ), highest straw yield (8.43 t ha -1 ), highest biological yield (12.81 t ha -1 ) and highest harvest index (38.67%) were recorded from the combined treatment of V 1 T 1 (Chiniatop 1+Organic fertilizer) and highest ineffective tillers hill -1 -1 (3.56), highest unfilled spikelet panicle

(43.43) and highest grain sterility (39.63%) were recorded from the combined treatment of V 4 T 2 (Zirabhog+Inorganic fertilizer). Among the aromatic rice cultivars Chiniatop 1 showed better performance in case of grain qualities such as strong aroma, maximum length-breadth ratio (4.37), maximum elongation ratio (1.53) and minimum cooking duration under organic fertilizer than inorganic fertilizer. From the above discussion, Chiniatop1 was showed better performance under organic fertilizer in boro season.

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