ABSTRACT

In 2014 July to December field experiments on transplant aman rice cv. BR11 under different levels of chemical fertilizers and green manures Dhaincha (Sesbania aculeata) and Mimosa invisa were conducted at Sher-e-Bangla Agricultural University, Dhaka. Crop growth dynamics, yield attributes and yields were evaluated against the response of aman rice to the treatments. The treatments comprised two factors e.g. factor A: level of fertilizers (0, 50, 75 and 100% of recommended dose of fertilizer-RFD) and factor B: levels of green manures management (0, 5 and 10 tha-1, incorporated 1 and 15 days before transplanting). The experiments were carried out following split plot design with three replications. Recommended dose of fertilizers- N = 83, P = 20.96, K = 36.52, S = 11 and Zn = 1.5 kgha-1were applied in the form of Urea, Triple Super Phosphate (TSP), Muriate of Potash (MoP), Gypsum and Zinc sulfate, respectively. Sixty-day dhaincha and Mimosa invisa were incorporated before aman transplantation. Significantly higher grain yield was found due to F2G2 followed by F3G2, F1G1, F2G4 and F3G3. Plants of the control plot had lowest yield; It is noted here that perhaps Mimosa invisa @ 10 t ha-1 along with 75% RFD (F2G2) had balanced fertilizer effect on plant for its optimum growth, development and yield.

Key words: T. Aman Rice, Fertilizer, Green manure