EFFECT OF VERMICOMPOST AND NPK ON TUE GROWTH, CHEMICAL COMPOSITION AND YIELD OF WHEAT

A Thesis Submitted to the FaciLity of Agriculture. Sher-e-Bangla Agricultural University, Dhaka. in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE IN SOIL SCIENCE SEMESTER: .JULY-DECEMBER, 2005

A field experiment was conducted at the Sher-e-Bangla Agricultural University Farm, Dhaka 1207 during the Rabi season of 2004-2005 to study the effect of vermiconipost and NPK on the growth. chemical composition and yield of wheat. The experimental soil was silty clay in texture having pH of 6.0. The treatments were 4 levels of vermicomposts viz. 'V(0 t ha'), V1 (l c ha'), V 2 (2 t haj, V(3 t ha5, and 4 levels of chemical fertilizers viz. 50 = (0-0-0 k g ha'). F1 = low (40-30-20 kg ha'). F2 = medium (80-60-40 kg haj and F3 = high (120-80-60 kg ha) of N-P205-K2 0 with 16 treatments combinations and 3 replications. The results demonstrated that with the increasing the closes of vermicomposts and chemical fertilizers increased grain and straw yield of wheat significantly. The maximum significant grain and straw yields were obtained with the treatment combinations V 3?2 or V?3 The highest doses of vermicompost and chemical fertilizers increased N, P. K and S concentrations in wheat plant significant at different stages of plant growth and also enhanced N, P. K and S uptake significantly at the ripening s(agc. Application of chemical fertilizers failed to increase organic matter content of post harvest soil, where as vermicomposts showed a significant positive effect. Vermicompost and chemicals fertilizers also increased N. P. K and S status of soil significantly.