Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

EFFICIENT USE OF NITROGEN IN WETLAND RICE CULTIVATION (Pages : 23 - 27)

A field experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during boro season of 2012 to evaluate the effects of prilled urea (PU), urea super granule (USG) alone or in combination with poultry manure (PM) on N use efficiency (NUE) and yield performance of rice (BRRI dhan29). The experiment was laid out in a randomized complete block design with three replications. There were eight treatments namely, T1: Control (no N fertilizer); T2: 104 kg N ha-1 from USG; T3: 104 kg N ha-1 from PU; T4: 52 kg N ha-1 from USG; T5: 52 kg N ha-1 from USG + 52 kg N ha-1 from PU; T6: PM 4 t ha-1; T7: 52 kg N ha-1 from USG + 2 t ha-1 PM and T8: 52 kg N ha-1 from PU + 2 t ha-1 PM. The recommended doses of P, K, S and Zn fertilizers were applied to all the experimental plots during final land preparation. USG was deep placed at 8-10 cm below the soil surface at 7 days after transplanting and PU was applied in different splits. Application of N as PU, USG alone or in combination with PM resulted in a significant increase in yield components, grain and straw yields of BRRI dhan29. The treatment T5 (52 kg N ha-1 from USG + 52 kg N ha-1 from PU) produced the highest grain (5.82 t ha-1) and straw (7.28 t ha-1) yields. The lowest grain (2.78 t ha-1) and straw (3.26 t ha-1) yields were recorded in control plots. The treatment T7 (52 kg N ha-1 USG + 2 t ha-1 PM) attained the superior position in NUE and apparent N recovery (ANR) by BRRI dhan29. The overall results indicate that application of USG in combination with PM could be considered more effective in rice production in aspect of increased rice yields and efficiency of applied N. Download