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Effect of Nitrogen Application on Morphological Characters and Yield Attributes of Fine Aman Rice Cv. Kalizira

M.A. Haque
Farm Management section, Bangladesh Agricultural University, Mymensingh

M.A. H. Khan
Farm Management section, Bangladesh Agricultural University, Mymensingh

M.E. Haque
Deartment of Agricultural Extension, Khamarbari, Dhaka

M. S. Islam
Deartment of Agricultural Extension, Khamarbari, Dhaka

M. F. Islam
Bangladesh Agricultural Development Corporation

Abstract/ Executive Summary:

An experiment was conducted at the Bangladesh Agricultural University Farm, Mymensingh during the aman season of 2005-2006 to investigate the response of different doses of nitrogen application at different growth stages for maximizing yield and yield attributes of fine aman rice (cv. kalizira). The experiment consisted of 3 levels of N application namely, 50% of recommended N, 100% of recommended N (150 kg ha^-1 ) and 25% higher than recommended N and 3 different plant growth stages of N application namely transplanting, maximum tillering and panicle initiation stage. The application of single super phosphate, muriate of potash, gypsum and zinc sulphate were same in all the plots at the rate of 125, 67, 20 and 5 kg ha^-1 respectively. The experiment was laid out in a split plot design (SPD) with three replications. All data were analyzed using the analysis of variance technique and the mean differences were adjusted by DMRT. The results revealed that excluding a few parameters, different doses of nitrogen and nitrogen application stages had significantly influenced yield components. The highest grain yield (3.09 t ha^-1) was found in N application at maximum tillering stage due to higher effective tiller hill^-1 (10.31), filled grains panicle^-1 (148.58). In case of N dose, 25% higher than recommended dose was superior to other two doses with respect to number of grains panicle^-1, 1000-grain weight and harvest index. Although the interaction effect of N application stages and levels of N application were statistically insignificant but numerically higher grain yield (3.07 t ha^-1) was found in N application at maximum tillering stage under 100% N of recommended dose.

Keywords: Growth stages, Nitrogen fertilizer, Agronomic practice, Yield attributes, Kalizira variety.

Location: Bangladesh Agricultural University Farm, Mymensingh

Start Date: 16-09-2005

End Date: 07-01-2006

Program Area: Variety and Species

Commodity: Rice

Objectives:

1. To find out the response of different doses of nitrogen application at different growth stages for maximizing yield and yield attributes of fine aman rice (cv. kalizira).

Methodology:

The experiment was conducted at the Bangladesh Agricultural University Farm, Mymensingh during the aman season of 2005-2006 to investigate the response of different doses of nitrogen application at different growth stages for maximizing yield and yield attributes of fine aman rice (cv. kalizira). The experiment consisted of 3 levels of N application (kg ha^-1) namely, 50% of recommended dose of N (N₁), 100% of recommended dose of N (N₂) and 25% higher than recommended dose of N (N₃) and 3 different plant growth stages of N application namely transplanting (T₁), maximum tillering (T₂) and panicle initiation stage (T₃). According to the soil test values and their interpretations, the fertilizers dose were recommended with the help of FRG namely urea, single super phosphate, muriate of potash, gypsum and zinc sulphate at the rate of 150, 125, 67, 20 and 5 kg ha^-1 respectively and except urea entire fertilizers were applied as same in all the plots at the time of final land preparation. Urea was applied in three equal splits at transplanting, maximum tillering and panicle initiation stage of the crop. The experiment was laid out in a split plot design (SPD) with three replications. The unit plot size was 5 m x 2 m with an inter-plot and inter-block spacing of 0.5 m and 1.5 m respectively. Thirty days old two healthy seedlings were transplanted per hill in the experimental plots at a plant spacing of 20 cm x 15 cm on 16 September, 2005 and the crop was harvested at maturity on 7 January, 2006. All the intercultural practices such as gap filling, weeding, water and pest management were done in time as and when necessary. Five hills were randomly selected from each plot for data collection excluding border rows. Grain and straw yield were determined from the harvest of central 2.5 m x 2.0 m area in each plot. All the data recorded at harvest, were analyzed using the analysis of variance technique and the mean differences among the treatments were adjusted by DMRT.

Source of Information: J. Agrofor. Environ. 6 (1): 67-70, 2012; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results revealed that excluding a few parameters, different doses of nitrogen and nitrogen application stages had significantly influenced yield components. The highest grain yield (3.09 t ha^-1) was found in N application at maximum tillering stage due to higher effective tiller hill^-1 (10.31), filled grains panicle^-1 (148.58). In case of N dose, 25% higher than recommended dose was superior to other two doses with respect to number of grains panicle^-1, 1000-grain weight and harvest index. Although the interaction effect of N application stages and levels of N application were statistically insignificant but numerically higher grain yield (3.07 t ha^-1) was found in N application at maximum tillering stage under 100% N of recommended dose.

Knowledge Management: Journal