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Effect of Urea Super Granules on the Performance of Transplant Aman Rice

Fatema-Tuz-Zohra
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

R. Ali
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

M. Salim
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

M.A. Kader
Department of Agronomy, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

The yield performance of three transplant aman rice namely, BINA dhan7, BRRI dhan46 and Kalizira were evaluated under five levels of urea super granules (USG) viz. control (no USG), one, two, three and four pellet(s) of USG/4 hills providing 0, 30, 60, 90 and 120 kg N ha^-1, respectively, and recommended dose of prilled urea were evaluated at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the aman season (July to December) of 2011. Variety exerted significant influence on yield of transplant aman rice. Grain yield was highest (5.46 t ha^-1) in BRRI dhan46 and straw yield was highest (6.58 t ha^-1) in Kalizira. Grain yield was found the highest (4.91 t ha^-1) from the level of 2 pellets of USG/4 hills and straw yield was found the highest (6.60 t ha^-1) from the level of 4 pellets of USG/4 hills. It was observed that in most of the cases, all the varieties performed better for their yield contributing characters with 2 pellets of USG/4 hills compared to any other levels. The findings suggest that BRRI dhan46 can be cultivated to obtain high rice yield, BINA dhan7 for short duration and Kalizira for obtaining aromatic rice with 2 pellets of USG in transplant aman season.

Keywords: Urea Super Granules, Transplant aman rice

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2011

End Date: 00-12-2011

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

1. To indentify the most suitable transplant aman rice variety and to find out the optimum level of USG for higher yield of transplant aman rice.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during the period from July to December 2011. The experimental site belongs to the Sonatola series of the Old Brahmaputra Floodplain (AEZ-9). The climate of the area is characterized by high temperature and heavy rainfall during kharif season (April to September) and scanty rainfall associated with moderately low temperature during the rabi season (October to March). The overall relative humidity remains high during most part of the year except the winter season. Two experimental factors were included in the study: i) Factor A: Variety- 3 and Factor B: 5 levels of urea super granules (USG) and recommended dose of prilled urea.The selected varieties were: BINA dhan7 (V1), BRRI dhan46 (V2) and Kalizira (V3). Level of USG were: control (no pellets of USG) = 0 kg N ha^-1 (N0), one pellet of USG (0.9 g)/4 hills = 30 kg N ha^-1 (N1), two pellets of USG (0.9 g)/4 hills = 60 kg N ha^-1 (N2), three pellets of USG (0.9 g)/4 hills = 90 kg N ha^-1 (N3), four pellets of USG (0.9 g)/4 hills = 120 kg N ha^-1(N4) and prilled urea = recommended dose 200 kg urea ha^-1 (N5). The experiment was laid out in a randomized complete block design with three replications. The size of each unit plot was 4.0m × 2.5m. After final land preparation rice seedlings were transplanted on the experimental plots on 18 August, 2011. As per experimental specification one, two, three or four pellet (s) of USG were placed manually at 6-8 cm depth at the centre of four hills of two adjacent rows, ten days after transplanting (DAT). Then nitrogen in the form of prilled urea was applied as per experimental specification in 3 equal splits at 15, 30 and 45 DAT. The crops were harvested in different time according to varietal maturity. After harvesting, grains were threshed, cleaned and sun dried and the grain yield plot-1 was recorded at 14% moisture content. Straw were sun dried to record the straw yield plot^-1. Experimental data on yield and yield contributing characters were recorded on different parameters. The collected data were analyzed by using “Analysis of Variance” technique and the differences among treatment means were adjudged by the Duncan's Multiple Range Test.

Source of Information: J. Agrofor. Environ. 7 (1): 49-52, 2013; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It may be concluded that BRRI dhan46 is the most suitable variety among the three transplant aman rice varieties to obtain high yield. BINA dhan7 is suitable as a short duration aman rice variety toaccomodaterabi crops in the crppping pattern. Kalizira can be grown to obtain aromatic rice which has the highest market price among the three transplant aman rice varieties. Therefore, farmers can transplant BINA dhan7, BRRI dhan46 and Kalizira with proper spacing and fertilizer management during aman season. Two pellets of USG/4 hills performed the best result in respect of grain yield irrespective of varieties. Hence, it is recommended that farmers can use 2 pellets of USG weighing 0.9 g of each pellet by placing them in the center of four hills of two adjacent rows with the spacing of 25 cm x 15 cm for higher yield of aman rice.

Knowledge Management: Journal