EFFECT OF PRILLED UREA AND UREA SUPER GRANULE ON THE GROWTH, YIELD AND NITROGEN USE EFFICIENCY OF T. AMAN RICE (BR 11)

Abstract

A field experiment was carried out at the Field, Sher-e-Bangla Agricultural University, Ohaka during Kharif-2 season of' 2007 to evaluate the effect of pulled urea and urea super granule on the yield and nutrient uptake of BR1 I rice. The experiment comprises nine treatments laid out in a Randomized Complete Block Deign (RCBD) with three replications. The treatments were; To (Control), T, (N

12 (N 701,u). 1'3 40us(j), T 6 (N 70usc). T 7 (N I (N lOOpu), T 4 (N OOIJSG) and T 8 (N I 130pu), T 5 (N 3OusG). The recommended fertilizer doses used for P, K. S and Zn were 20, 50, 16 and 2 kg hi' respectively. The N fertilizers were used in two forms namely prilled urea and urea super granule @40,70, 100, 130 kg hi'. Application of different forms of N significantly increased the yield components and grain and straw yields of BRI I rice. The performance of urea super granule was superior to prilled urea at all the doses of N application except the highest dose 130 kg N hi' .The treatment T 7 (N lOOus(;) produced the highest grain yield of 4867.33kg hi' and straw yield of 5797.66 kg ha 4 . The lowest grain yield (3025.66 kg hi') and straw yield (3694.66Kg hi') were round in control (T 0 ) treatment The overall results indicate that application of urea super granule @ 100 kg N ha" can be more efficient and economic for T-aman rice production. However, further investigation is necessary to make concrete recommendation.