EFFECT OF UREA AND NPK BRIQUETTE ON THE GROWTH AND YIELD OF T. AMAN RICE (BR 11)

Abstract

The experiment was conducted at the Research Farm, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from July 2015 to November 2015 to determine the effectiveness of mixed NPK briquette fertilizer on the growth and yield of transplanted Aman rice (BR11). The experimental field belongs to the Agroecological

zone (AEZ) of “The Modhupur Tract”, AEZ-28. The experiment was laid out in a randomized complete block design(RCBD) with four replications. The total numbers of plots were 20. The size of each plot was 6 m 2 (3 m × 2 m). The five treatments were T 0 : 0kg N/ha (control), T : 78kg N/ha as Prilled Urea (Recommended dose of FRG 2012), T 2 1 : 52kg N/ha as Prilled Urea, T : 52kg N/ha as Urea Briquette (one 1.8 g briquette/4 hills of rice) and T 4 3 : 52kg N/ha as NPK briquette (one 3.4g briquette/4hills of rice). The result of yield contributing characters such as the tallest plant height (122.68 cm) was found in treatment T (One 3.4 g NPK briquette/4 hills of rice). The longest panicle length (25.90 cm) was recorded in the treatment T 4 (one 3.4 g NPK briquette/4 hills of rice). The maximum number of effective tillers/hill (13.55) was found from T (52 kg N/ha as prilled urea) treatment and the maximum 1000 seed weight (25.25 gm) was recorded from treatment T 2 (one 3.4 gm NPK briquette/4 hills of rice). The highest number of filled grain (174.50) was found in the treatment T 4 (52 kg N/ha as Prilled urea) and the highest number of non effective tillers/hill (1.48) was found from the treatment (control) T and the highest unfilled grain (12.85) was found from the treatment T4 (one 3.4g NPK briquette/4 hills of rice). The highest grain yield of (2.04 kg/plot) (3.38 t/h) was recorded from the treatment T 0 (52 Kg N/ha as one 1.8 g urea briquette/4 hills of rice) and the NPK briquette was represented almost similar grain yield (3.28 t/ha) at the treatment T 4 3 which had no statistical significant difference with the highest yield T treatment. The highest straw weight (3.17 kg/plot) was recorded from the treatment T 3 (one 3.4gm NPK briquette/4 hills). However, Mixed

4 4 2 NPK and USG showed better grain yield and straw yield compared to conventional broadcast prilled urea. USG and mixed NPK fertilizer showed better and almost similar performance to growth and yield of transplanted aman rice (BR11) compared to the prilled urea. 4