EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON THE PERFORMANCE OF WET SEASON RICE

Abstract

The experiment was conducted at the Research Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh in Aman season during July to November 2019. The study was undertaken to investigate the effect of organic and inorganic fertilizers on the growth, yield, and yield components and to find out suitable combination of organic and inorganic fertilizers for achieving maximum yield of wet season rice . Eight nutrient combinations of organic and inorganic sources viz. T 1 = No fertilizer (Control), T

P 15 K 55 S 10 Zn 1 kg ha -1 (Recommended fertilizers dose , T 3 = ½ T 2 + 75 kg ha Mustard Oil Cake (MOC), T 4 = T 2 + 75 kg ha -1 MOC, T 5 = ½ T 2 + 3.7 t ha -1 Poultry Manure (PM), T 6 = T 2 + 3.7 t ha -1 PM, T 7 = ½ T 2 + 5 t ha -1 Cowdung and T 8 = T 2 + 5 t ha Cowdung were tested against the high yielding rice variety BRRI dhan87 in wet season 2019. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Different organic and inorganic fertilizers significantly influenced the growth parameters, yield and yield components of BRRI dhan87. Among the nutrient management options, T performed the best in respect of all of the parameters having growth, yield and yield contributing characteristics while the lowest value of those parameters was observed in the control treatment T 4 . The longest plant height (128 cm) was recorded in T 4 followed by T 6 1 (120 cm) and the shortest plant (96 cm) being found in T 1 where the crop was not fertilized. The treatment T produced the highest number of panicles hill -1 4 (18.9) which was significantly higher than all other treatments. The highest number (97) of grains panicle -1 were obtained in T 4 -1 which was at par with T (92), but significantly higher compared to the other treatments. Grain weight of BRRI dhan87 was also remarkably influenced by the nutrient management options and the highest 1000grain weight (24.3 g) was obtained in T that was at par with T6 (23.5 g) and T8 (23.4 g). Among the organic and inorganic fertilizers combinations, T 4 produced the highest grain yield (6.70 t ha -1 4 ) which was statistically higher compared to all other treatments and the lowest grain yield (3.10 t ha -1 ) obtained when the crop were not fertilized. Straw yield and harvest index followed the similar trend of grain yield. Moreover, mustard oil cake performed the best compared to poultry manure and Cowdung applied along with chemical fertilizers. Therefore, It could be concluded that the treatment T S 10 Zn 1kg ha -1 + 75 kg ha -1 mustard oil cake) might be recommended for sustainable cultivation of wet season rice cv. BRRI dhan87 to obtained higher yield and better performance.