COMBINED EFFECT OF CHEMICAL NITROGENOUS FERTILIZER AND TREATED SLUDGE ON THE GROWTH AND YIELD OF BRRI dhan62

Abstract

An experiment was carried out at Soil Science farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka to study the combined effect of chemical nitrogenous fertilizer (urea) and treated sludge on the growth and yield of BRRI dhan62 during the period from July to October, 2014. The experiment was laid out in a randomize block design with three replications. Seven treatments of the experiment including control were as T 1 = Absolute Control, T = 100% Recommended Field Dose (RFD) of Urea, T = 80% RFD of Urea + 20% sludge, T 4 = 60% RFD of Urea + 40% sludge, T 5 3 2 = 40% RFD of Urea + 60% sludge, T = 20% RFD of Urea + 80% sludge and T = 100% sludge. Here it can be mentioned that recommended fertilizer dose (RFD) per hectare = Urea 150kg + TSP 71kg + MP 71kg + Gypsum 41.1kg + ZnSO 4 7 11.2kg + sludge 0.0kg and 1kg urea = 10 kg sludge. The results from the study revealed that the highest plant height (99.93 cm), the highest number of tiller per hill (14.95) and the longest panicle (23.99 cm) was recorded from T (100% RFD of urea); the maximum number of grain per panicle (98.21) and the highest number of filled grain per panicle (91.95) was recorded from T 4 2 (60% RFD of urea + 40% sludge). The maximum number of effective tiller per hill (14.56), the highest weight of 1000 seeds (24.23g), Seed yield t/ha -1 (4.36), and Straw yield t/ha -1 (5.66) were achieved from T (80% RFD of urea + 20% sludge). Chemical fertilizer in combination with sludge performed better in respect of almost all parameters studied. 3 6