EFFECT OF ORGANIC AND INORGANIC FERTILIZERS ON TUE GROWTH, YIELD AND NUTRIENT UPTAKE BY RICE

Abstract

A field experiment was conducted at the Sher-c-l3angla Agricultural University Farm, Dhaka 1207 during the K/mr/f-I season of 2005 to study the efkct of organic and inorganic fertilizers on the growth, yield, nutrient concentration and uptake by rice. The experimental soil was silty clay in texture having 1)11 of 59. The treatments were 4 levels of vermicomposts viz. V0 (0 t ha'), V1 (2 t ha'), V2 (4 t ha),V3 (U t haS'), and 4 levels of chemical fertilizers viz. F0= (0-0-0-0 kg ha' N, P205, K20, respectively), F1 = low (50-40-30 kg ha1 N. P205, K20, respectively), F2 = medium (80-60-50 kg ha1 N, P205, K20, respectively), F3 high (110-80-70 kg haS' N, 1)205, K20, respectively) with 16 treatment combinations and 3 replications. The results demonstrated that the increasing doses of vermicontposts and chemical fertilizers increased grain and straw yields of rice significantly. The maximum significant grain and straw yields were obtained with the treatment combinations. V3F2 . The optimum production of rice ( BR-26,Shraboni) was obtained when 6 t ha1 vcrmicornpost combined with 80, 60, and 50 kg N. P205 and K20, respectively were applicd The highest doses of vermicompost and chemical fertilizers increased both the conceniration and uptakes of N. P, K and S by rice plant significantly at the harvesting stage and showed highest values with V31'3 treatment combination. Application of chemical fertilizers alone failed to increase organic matter content of post harvest soil, whereas combined application of vermicompost and inorganic fertilizers showed a significant positive cfThct. Vermicompost and chemical fertilizers also inc.rcaS N P. K and S status of post harvest soil significantly.