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Effect of Variety and Depth of Placement of Urea Super Granule on the Yield and Yield Components of Boro Rice

Md. Anowerul Islam
Department of Agricultural Extension, Kaliganj, Satkhira-9440, Bangladesh

Md. Faridul Islam
Agronomy Division, Regional Agricultural Research Station, Akbarpur, Moulvibazar-3210, Bangladesh

Jubaidur Rahman
Agronomy Division, Regional Agricultural Research Station, Jamalpur-2000, Bangladesh

Md. Abdur Rahman Sarkar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Md. Razibur Rahman
Department of Agricultural Extension, Bagmara, Rajshahi-6250, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during the period from December 2008 to May 2009 to study the effect of variety and depth of placement of urea super granules (USG) on the yield and yield components of Boro rice. The experiment consisted of two variety namely, BRRI dhan28 and BRRI dhan29 and three depths of placement of USG viz. 3 cm, 6 cm and 9 cm. The experiment was laid out in a randomized complete block design with three replications. Higher grain yield (5.03 t ha-1) was obtained from BRRI dhan29 than from BRRI dhan28 (4.30 t ha-1). The highest grain yield (5.16 t ha-1) was obtained with the placement of USG at 6 cm depth and the lowest (4.11 t ha-1) at 3 cm depth. Grain yield was also affected by the interaction of variety and depth of placement of USG. The highest grain yield (5.95 t ha-1) was found in BRRI dhan29 fertilized with 6 cm depth of placement of USG and the lowest grain yield (3.15 t ha-1) was found in BRRI dhan28 with 3 cm depth of placement of USG. Performance of BRRI dhan29 was better than that of BRRI dhan28 in the Boro season. USG gave better performance in respect of grain yield when placed at 6 cm depth. Hence, it is expected that USG may enable small scale rice farmers to apply one granule in the centre of 4 hills of two adjacent rows. Among the depth of placement of USG, 6 cm depth gave better performance in respect of grain yield.

Keywords: Boro rice, Variety, Urea super granule, Yield

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-12-2008

End Date: 00-05-2009

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The present study was undertaken to evaluate the performance of two Boro rice varieties, to determine the optimum depth of placement of USG for the cultivation of Boro rice; and to find out the effect of interaction among these factors, if any, on yield and yield components of Boro rice.

Methodology:

Experimental site: The experiment was conducted at the Agronomy Field laboratory, Bangladesh Agricultural University, Mymensingh, during the period from January to May 2009. Experimental treatments and design The experiment consisted of the following treatments- i) two varieties namely, BRRI dhan28 and BRRI dhan29, and ii) three different depths of placement of USG viz. 3 cm, 6 cm and 9 cm. Randomized complete block design was followed in this experiment with three replications. Each of the replication represented a block in the experiment. Each block was divided into 24 unit plots where 24 treatment combinations were allocated at random. There were 72 unit plots in the experiment. The size of unit plot was 4.0 m × 2.5 m. The distances between blocks and plots were 1 m and 50 cm, respectively. Variety and cultivation Two rice varieties (BRRI dhan28 and BRRI dhan29) were used as plant material in the experiment. In the experiment, chemical fertilizers i.e. triple superphosphate (76 kg ha-1), muriate of potash (60 kg ha-1), gypsum (50 kg ha-1) and zinc sulphate (10 kg ha-1) were applied at the time of final land preparation. Urea Super Granules (175 kg ha-1) was applied in the middle of 4 hills of two adjacent rows at a time at 15 Days after Transplanting (DAT). Data collection analysis Data on individual plant parameters were recorded from five randomly selected hills of each plot and those on seed moisture percentage, grain yield, straw yield, biological yield and harvest index were recorded from the whole plot at harvest. All the collected data were analyzed following the analysis of variance (ANOVA) technique and mean differences were adjudged by Duncan's Multiple Range Test (DMRT) (Gomez & Gomez, 1984) using a computer operated programme namely MSTAT.

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Achievement/Findings:

According to the result of the experiment, it can be concluded that the performance of BRRI dhan29 was better than that of BRRI dhan28 in the Boro season. USG gave better performance in respect of grain yield when placed at 6 cm depth. Hence, it is expected that USG may enable small scale rice farmers to apply one granule in the centre of 4 hills of two adjacent rows. Among the depth of placement of USG, 6 cm depth gave better performance in respect of grain yield.

Knowledge Management: Journal