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Effect of Variety and Method of Usg Placement on the Yield Performance of Transplanted Aman Rice

Dr. A. T. M. Ziauddin
Professor
Department of Farm Power and Machinery, Bangladesh Agricultural University, Mymensingh-2200Bangladesh,

Abstract/ Executive Summary:

A field experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from July to December 2011 to evaluate the effect of variety and placement method of urea super granule (USG) on the yield performance of T. aman rice varieties. The experiment consisted of three aman rice varieties viz., Pajam, BR11, BRRI dhan40 and four placement methods viz., broadcasting method of prilled urea (PU), USG placement by hand, by BAU USG applicator and by BARI USG applicator. The experiment was laid out in a randomized complete block design with four replications. The highest value of grain yield (5.13 t/ha), straw yield (5.90 t/ha) and biological yield (11.04 t/ha) were found in BR11. On the other hand, the lowest grain yield (3.54 t/ha) was produced in variety Pajam. The highest grain and straw yields (5.13 and 5.21 t/ha, respectively) were obtained from the hand placement method of USG. Regarding the interaction of variety and USG placement method, BR11with hand placement method appeared as the best method among others.

Keywords: T. aman rice, Urea super granule (USG), USG applicator, Prilled urea, Yield

Location: Mymensingh

Start Date: 00-07-2011

End Date: 00-12-2011

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The study was designed and carried out to evaluate the effect of USG compared to prilled urea as a source of nitrogen on the yield of different T. aman rice varieties and to determine the suitability of hand placement of USG against two mechanical devices of USG application.

Methodology:

The experiment was carried out at the Agronomy Field Laboratory of the Bangladesh Agricultural University, Mymensingh during the period from July to December 2011. The soil of the experimental field lies in agro-ecological region of Old Brahmaputra Floodplain (AEZ 9). It belongs to the Sonatola series of non-calcareous dark grey floodplain type. It was a two factor experiment consisting three aman rice varieties viz., Pajam, BR11, BRRI dhan40 and four placement method viz., broadcasting method of prilled urea, USG placement by hand, by BAU USG applicator and by BARI USG applicator. Randomize complete block design (RCBD) was laid out with four replications. Treatments were assigned randomly in the 48 (3×4×4) unit plots. Spaces between blocks and unit plots were 0.75m and 0.50m, respectively. The size of unit plot was 20m² (8.0 m × 2.5 m).One month old seedlings were transplanted on 10 August 2011 maintaining no spacing for broadcasting method of prilled urea, row and hill spacing of (25 cm × 15 cm) for hand placement of USG and spacing (20cm x 20cm) for both machine placement of USG. Intercultural operations were done in order to ensure and maintain the normal growth of the crop as and when necessary. When 90% of grain became golden yellow in color, five hills (excluding border hills) were randomly selected from each unit plot for recording data on different agronomic crop characters. Grain and straw yields were recorded from whole area in each unit plot. The collected data were analyzed statistically following the Analysis of Variance (ANOVA) technique and the significance of the mean differences were adjudged by Duncan's Multiple Range Test (DMRT) using a statistical computer package program MSTAT-C.

Source of Information: J. Bangladesh Agril. Univ. 12(1): 7–12, 2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget: BDT300000

Total Budget (Tk.) : BDT300000

Achievement/Findings:

From the discussions of the above stated results, it can be concluded that, BR11 performed the best regarding grain yield. But all the varieties have some advantages and disadvantages over one another. BRRI dhan40 matured later by 12 days compared to other two rice varieties. This may facilitate the accommodation of the succeeding crop in sequence. Therefore, any one of the varieties may be chosen depending on choice and performance of the farmers. Hand placement method of USG performed the best in respect of grain yield irrespective of varieties. These might be happened due to uniform placement of urea in the root zone in case of USG applicator due to blocking problem in discharge pipe USG pillets were not placed uniformly. Hence it can be recommended that farmers can use USG by hand placement method. But in terms of cost versus yield, machine placement also recommended as it reduces labor cost and time.

Knowledge Management: Journal