INFLUENCE OF FERTILIZER MANAGEMENT ON THE GROWTH AND YIELD OF BORO RICE

Abstract

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Dhaka 1207. Bangladesh during the period from November, 2020 to March, 2021 to observe the effect of different combination of chemical fertilizers and organic materials on the performance of rice varieties grown in boro season. The experiment comprised two factors viz. factor A: Variety – 3; i) BRRI dhan63 (V ), ii) BRRI dhan81 (V 2 ) and BRRI hybrid5 (V ) and factor B: different combinations of chemical fertilizers and organic materials – 5; i) Control (no fertilizer) (F 3 ), ii) chemical fertilizers T recommended dose (RDF) (F 1 ), iii) Cow dung + RDF (F ), iv) Vermicompost + RDF (F3) and v) Rice straw decomposition + RDF (F ). The experiment was laid out following Split Plot Design with three replications. Data were collected on different aspects of growth, yield attributes and yield of rice. Results revealed that BRRI hybrid5 gave the highest grain yield (7.84 t ha -1 ). This may be attributed to the highest number of effective tillers hill -1 (11.24) and 1000 grain weight (28.78 g) in this variety. Considering different combinations of chemical fertilizers and organic materials, F ( rice straw decomposition + RDF) treatment was highest grain yielder ( 7.59 t ha -1 4 ) than other combinations comprised with organic materials and RDF which was due to the highest effective tillers plant (11.58), grains panicle -1 (85.19) and 1000-grain weight (24.43 g) in this treatment. Regarding the interaction of variety and different combinations of chemical fertilizers and organic materials, the combination of rice variety BRRI hybrid5 x rice straw decomposition + RDF (V 3 F ) was highest yielder among the other interactions which was attributed to higher effective tillers hill 4 -1 (12.93) and 1000 grain weight (29.79 g). It may be concluded from the results that for adding organic matter in rice field, rice straw decomposition with recommended dose of chemical fertilizer (RDF) seems promising for cultivation of boro rice.