Evaluation of Urea Super Granule as a Source of Nitrogen in Transplant <i>Aman</i> Rice

Abstract

An experiment was carried out at Bangladesh Agricultural University, Mymensingh to evaluate the effect of urea super granule (USG) as a source of nitrogen on the yield and yield components of transplant Aman rice cv. BRRI dhan39, BRRI dhan46 and BINA dhan7. Five levels of N (viz., 0, 60, 120 kg ha -1 as prilled urea and 60 and 120 kg ha -1 as USG) were taken as experimental treatments. The experiment was laid out in a randomized complete block design with three replications. Plant height, effective tillers hill -1 , grains panicle -1 and grain yield varied significantly due to different cultivars. All the yield and yield components except 1000-grain weight were influenced significantly by the levels of nitrogen fertilizer. The highest grain yield (4.82 t ha -1 ) was recorded in BINA dhan7 and the lowest one (4.30 t ha -1 ) was recorded in BRRI dhan39. Nitrogen @ 120 kg ha -1 as USG performed the best among the treatments in respect of yield and yield components of rice. The highest grain yield (5.46t ha -1 ) was obtained from BINA dhan7 with 120 kg N ha -1 as USG which was statistically identical with 60 kg N ha -1 as USG. A considerable amount (31.25%) of prilled urea (PU) nitrogen could be saved by using USG. It may be concluded that USG could be used as N management to achieve better nitrogen use efficiency in reducing N loss than the PU.

Performance of Boro Rice in Response to Different Application Methods of Urea Fertilizer

“…m -2 , panicle length (cm), filled grain panicle -1 , unfilled grain panicle -1 , and harvest index (%) but significant response on 1000-grain weight (g) and grain yield (t ha -1 ) (Table 9). Qurashi et al (2013) also reported non-significant varietal effect on harvest index (%). V1 obtained statistically lower weight (19.91 g) compare to V2 (20.48 g) but ultimately gained higher production (6.87 t ha -1 ) than V2 (6.31 t ha -1 ).…”