EFFECTS OF COMBINED APPLICATION OF INORGANIC PHOSPHATIC, POTASSIC FERTILIZERS AND VERMICOMPOST ON GROWTH, YIELD AND NUTRIENT CONTENTS OF BRRI dhan57

Abstract

An experiment was conducted in the farm of Sher-e-Rangla Agricultural University. Dhaka. Bangladesh during the period from August to December 2013 to study effects of combined application of inorganic phosphatic. potassic fertilizers and vermicompost on growth, yield and nutrient contents of BRRI dhan57. Ten fertilizer treatment combinations have been considered for this experiment, which were as follows: 1-0 = control, T, = recommended dose of chemical fertilizers + 0% vermicompost, 12 = 0% inorganic P + 100% p from vermicompost., T1 = 25% inorganic P + 75% p from vermicompost. T4 = 50% inorganic P ± 50% P from vermicompost., 'F5 = 75% inorganic P ± 25% p from vermicompost, 16 = 0% inorganic K + 100% K from vermicompost. T7 = 25% inorganic K ± 75% K from vermicompost. T8 = 50% inorganic K + 50% K from vermicompost and 19 = 75% inorganic K + 25% K from vermicompost. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Data on different growth & yield parameters, nutrient contents in grain & straw, nutrients uptake by grain & straw were recorded. The highest plant heights (25.76, 54.24. 83.42, 97.81 and 117.93 cm at 30, 45, 60, 75 DAT and harvest respectively), the longest panicle (28.37 cm). the highest grain yield (4.88 t had ), the highest straw yield (6.23 t ha"), the highest N. P. K. S and Zn concentrations in grain (0.713%. 0.307%. 0.377%, 0.126% and 0.0153%, respectively) and the highest N. P. K. S and Zn concentrations in straw (0.488%. 0.080%, 1.158%, 0.086% and 0.0049%, respectively) were recorded from treatment T. For most of the parameters best results were found in treatment T8 which was statistically similar with treatment T4. The results of the study showed that the optimum performance of rice can be obtained from the combined application of vermicompost and chemical fertilizers.