EFFECTS OF INORGANIC PHOSPHORUS AND POTASSIUM ALONG WITH COWDUN.G AND VERMICOMPOST ON GROWTH, YIELD AND NUTRIENT CONTENT OF BRRI dhan62

Abstract

An experiment was conducted at the experimental field of the farm of Sher-e-Bangla Agricultural University during the period from May to October, 2014 to study the effects of different combinations of cowdung (CD) and vermicompost (VC) along with P and K on BRRI dhan62 using RCBD with three replications. The treatments were - Control. 'F1 - 100% inorganic fertilizer (IF), T2 —25 % P from + 75% p from IF. T3 —50 % P from CD + 50% P from IF, 1'4 75 % P from CD + 25% P from IF. T5 — 25 %Pfrom VC +75%Pfrom IF, T6-50%P from VC± 50%Pfrom IF, T7 — 75 %P from VC + 25% P from IF. T8— 25% K from CD + 75% K from IF, T950% K from CD + 50% K from IF. T10— 75% K from CD + 25% K from IF. T11 —25 % K from VC + 75% K from IF, T12 —50% K from VC + 50% K from IF. T13 —75% K from VC 25% K from IF. Most of the growth and yield parameters differed significantly due to the combinations of organic and inorganic sources of P and K. Ilighest plant height. effective tillers bilE', total tillers hill1, longest panicle were produced by 50% K from VC + 50% K from IF while 50% p each from VC and produced the highest number of filled grains panicleT The highest grain yield was obtained from 50% K from VC + 50% K from IF which was statistically similar to 50% p from VC + 50% P from IF. The highest straw yield was observed from 50% P from VC + 50% P from IF which was statistically similar to 50% K from VC + 50% K from IF. The highest P and S content in grain was observed from 50% p from VC + 50% p from IF while highest K content in grain was observed from 50% K from VC ± 50% K from IF. The overall results suggest that farmers can be advised to use 50% P or K from VC and 50% from IF for better growth and nutrient content of BRRI dhan62 under the agro climatic condition of Sher-e-Bangla Agricultural University.