INFLUENCE OF MANURE AND N P FERTILIZER ON YIELD AND SEED QUALITY OF BORO RICE

Abstract

An experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh, from October 2021 to April 2022 to study the effect of organic manure and N P fertilizer on boro rice's yield and seed quality of boro rice. The BRRI dhan28 was used as the test crop in this experiment. The experiment consists of 2 factors i.e., four level of organic manure. OM 0 : Without organic fertilizer (control), OM 1 : Cowdung @ 10 tha -1 , OM 2 : Vermicompost @ 3 tha -1 and OM 3 : Poultry manure @ 5 tha ; and four different N P fertilizer level F 0 : Without N P fertilizer, F 1 : 25% less than the recommended dose of N P fertilizer, F 2 : Recommended dose of N P fertilizer and F 3 : 25% Higher than the recommended dose of N P fertilizer. The experimental design was RCBD and treatments were replicated three times. The result revealed that among the organic manures, poultry manure was found best in respect of growth, yield, and seed quality parameters, this treatment produced the highest yield (4.90 tha -1 ), tallest plant (32.66, 50.95, 78.33, 94.75 and 99.30 cm) at 30, 50 70 90 DAT and at harvest, respectively; maximum tillers per plant for all sampling dates (8.90, 12.33, 13.10, 14.33 and 15.09) at 30, 50 70 90 DAT and at harvest, respectively and gave highest yield contributing parameters like effective tiller hill -1 (12.67), panicle length (21.90 cm), grain panicle (104.15) and 1000 grain weight (21.66 g). On the other hand, 25% Higher than recommended N P fertilizer dose gave the highest yield (4.50 tha -1 ). This dose also produced maximum plant height and tillers plant -1 for all growth stages, the highest number of grains panicle -1 (104.75), 1000 grain weight (21.67 g), and straw yield (5.33 tha ). Considering the interactions, Poultry manure @ 5 tha -1 (Om 3 ), 25% higher than the recommended dose of N P fertilizer (F 3 ), gave the highest grain yield (5.83 tha ). This interaction also gave the highest effective tiller hill -1 (14.70), panicle length (22.33 cm), and grain panicle -1 (6.26 tha -1 ). Regarding seed quality parameters, Poultry manure @ 5 tha -1 (Om 3 ) and 25% higher than the recommended dose of N P fertilizer (F 3 ) gave better performance. The study concluded that, poultry manure @ 5 tha -1 (Om 3 ) and 25% Higher than the recommended N P fertilizer (F 3 ) could be recommended for better yield and seed quality of BRRI dhan28.