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Performance of Locally Discovered Rice Cultivar (haridhan) in Bangladesh Under Urea Sprays Technology

Ekramul Haque
Department of Agronomy, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202

Md. Rashedur Rahman
Department of Agronomy, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202

Abdul Kader
Department of Agronomy, Faculty of Agriculture, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

The research work was conducted at the Agronomy Field Laboratory, Department of Agronomy, Bangladesh Agricultural University, Mymensingh during the period from July to November 2015 to evaluate the yield performance of BRRI dhan56 and a locally discovered rice cultivar Haridhan under foliar and traditional application of urea. The experiment included six treatments of urea application technique as T₁=N₀ (control), T₂=N_65%,T₃=N_50%+US (15%), T₄=N_50%+US (20%), T₅=N_60%+US (15%), T₆=N_100% (traditional method) and two rice varieties viz. HYV rice cultivar BRRI dhan56 and locally discovered rice cultivar Haridhan. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Foliar application of urea had significant effect on yield and yield components of BRRI dhan56 and Haridhan. It has been found that the treatment N_50%+US (20%) produced highest grain yield (6.14 t ha^-1) which might be due to the highest number of total tillers hill^-1 (15.03), effective tillers hill^-1(12.11), panicle length (26.21 cm) and grains panicle^-1 (156.91) got from this treatment. From the result it can be concluded that both the varieties produced highest grain yield with 50% of the required urea applied to the soil and 20% of the required urea applied as foliar spray that can save an amount of 30% of recommended dose of urea in rice field of Bangladesh

Keywords: Crop characteristics, HYV of rice, Locally discovered rice, Urea spray, Yield contributing characters

Location: Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2015

End Date: 00-11-2015

Program Area: Crop-Soil-Water Management

Non-commodity: Performance

Objectives:

To evaluate comparative yield performance of BRRI dhan56 and locally discovered rice variety Haridhan under various methods of urea application and find out the optimum amount of urea fertilizer to be applied as foliar spray technique to obtain the highest grain yield.

Methodology:

The experiment was conducted at Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh during the period from July 2015 to Nov 2015. Geographically the experimental site is located at 24.75° N latitude and 90.50°E longitude at an elevation of 18 m above the mean sea level under the Agro -ecological Zone of the Old Brahmaputra Floodplain (FAO and UNDP, 1988). Haridhan was used as the test variety in the study. It is one of the important rice cultivars developed by a farmer Haripad Kapali. It attains the height of 121.69 cm and grain yield reported by farmers is 6.08 t ha^-1.The Department of Agricultural Extension of the Government after examining the paddy has declared Haridhan as a profitable cultivar. It costs little to cultivate. Moreover, compared to the profuse growth, the expenditure for its cultivation seems to be very little. The farmers are getting bumper yield from Haridhan. Variety BRRI dhan56 was first evaluated by the Seed Certification Agency (SCA) in 2010. Then it was released by the National Seed Board (NSB) in 2011 as a drought tolerant variety. The cultivation of newly developed rice variety ‘BRRI dhan56’ in the current Aman season brought smile on the faces of the farmers in the country’s northern and south-western regions where aridity used to lead to crop failure to their woes. This variety have ushered a new era in rice cultivation during ‘Monga’ period in the drought prone areas to mitigate ‘Monga’. Researchers said BRRI dhan 56 is a short-duration variety which is cultivated during Aman season. It is also disease resistant variety, grain type is medium bold and plant attains a height of about 115 cm. The yield of this variety is about (4.5- 5.0 tha^-1) in normal condition and in drought condition at about is 3.0-3.5 tha^-1. The experimental land was first opened with a power tiller. The land was thoroughly preapred with the help of country plough and ladder. Weeds and stubble were removed from the field. The bunds around individual plots were made for proper water management between the plots. The individual plots of each block were prepared thoroughly by spading and then levelled just before the specified date of transplanting. Thirty day old seedlings were uprooted carefully from the nursery bed and transplanted in the individual plot on 18 July 2015 at the rate of 2-3 seedlings hill^-1 with a spacing of 25 cm × 15 cm. Various intercultural operations viz., irrigation, weeding, disease and pest management etc. were done and when necessary to ensure and maintain the favourable condition for normal plant growth and development. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Individual plot size was 4m × 2.5 m. There were 36 plots in the experiment. The experiment was superimposed in the Agronomy Field Laboratory, where another student grew the same crop surrounding the experiment. The field was fertilized with triple super phosphate, muriate of potash and gypsum @ 52, 82, 60 kg ha^-1, respectively. The whole amount of triple super phosphate, muriate of potash and gypsum was applied at final land preparation. The crop was harvested at full maturity. The date of harvesting was confirmed when 90% of the grains became golden yellow in color. Harvesting of BRRI dhan56 was done on 7 November 2015 and Haridhan was 27 Nov 2015. Five hills (excluding border hills) were selected randomly from each individual plot and uprooted before harvesting for recording data. After sampling the whole plot was harvested. The harvested crop of each plot was separately bundled, properly tagged and then brought to the threshing floor. The harvested crops were threshed manually. The grains were cleaned and dried to a moisture content of 14%. Straws were sun dried properly. Final grain and straw yields plot^-1 were recorded and converted to t ha^-1.

Source of Information: Archives of Agriculture and Environmental Science 4(2): 235-241 (2019)

Article Link (Online Journal): DOI: 10.26832/24566632.2019.0402017

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Foliar application of urea solution at different concentrations had significant effect on yield and yield components BRRI dhan56 and Haridhan except number of non-effective tiller, panicle length, weight of 1000 seeds and harvest index. The result revealed that highest grain yield (6.14tha^-1) was obtained from foliar application of urea i.e. when 50% of recommended dose of urea was applied as soil application and 20% was applied as foliar. The lowest grain yield was obtained from the treatment with no urea application (N₀). From the experiment it can be concluded that the yield and yield contributing characters greatly influenced by urea foliar application method in rice crop. This will help rice cultivating farmers to save at least an amount of 20% recommended dose of urea fertilizer and can contribute to national economy of Bangladesh.

Knowledge Management: Journal