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Effect of Variety and Date of Harvesting on Yield Performance of Boro Rice

Mahmud Hasan Jewel
Corresponding author
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

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

M M Rahman
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Md Jahidul Islam
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

The yield of rice in Bangladesh is much below compared to that of other rice-growing countries. The per hectare yield of rice of those countries is higher due to their adoption of improved varieties, modern farming technology and sophisticated cultural practices. Therefore, Bangladesh has a tremendous scope of increasing her total production by augmenting per hectare yield through the use of modern technology. Hence, from the practical point of view, greater attention should be paid for increasing the yield per unit area by growing modern varieties of rice through improved cultivation practices. An experiment was conducted for investigating the effect of variety and date of harvesting on yield performance of modern boro rice varieties at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during February to July 2015. The experiment comprised four rice varieties namely, BRRI dhan28, Hera hybrid2, Binadhan-14 and BRRI dhan58 and three-time of harvesting viz., 20, 27 and 34 days after flowering. The experiment was laid out in a split-plot design with three replications. Except plant height, all other characters were significantly influenced by different date of harvesting in all varieties. BRRI dhan58 was found significantly superior to Binadhan-14, BRRI dhan28 and Hera hybrid2 in respect of effective tillers, grains panicle^-1 , grain yield, biological yield and harvest index. Among three harvesting times, the highest grain yield (4.39 t ha^-1) and straw yield (5.50 t ha^-1) were obtained when the crop was harvested at 27 days after flowering. The interaction effect of variety and date of harvesting was significant in respect of grain and straw yield. The highest grain yield (5.07 t ha^-1) was observed in BRRI dhan58 when harvested at 27 days after flowering. Therefore, the optimum date of harvesting for higher grain yield may be 27 days after flowering for avoiding immature stage as well as shattering loss.

Keywords: Rice varieties, Date of harvesting, Days after flowering, Yield

Location: The Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date: 00-02-2014

End Date: 00-07-2014

Program Area: Postharvest and Agro-processing

Commodity: Rice

Objectives:

The following objectives- to evaluate the varietal effect on yield and yield attributes of boro rice, observe the yield performance of boro rice under various date of harvesting and examine the interaction effect of variety and date of harvesting if any, on the grain yield and yield contributing characters of boro rice.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, during the period from February to July 2015. Two factors were included in the experiment namely variety and date of harvesting. The treatments for rice variety were four that include i) BRRI dhan28-V1, ii) Hera hybrid2-V2, iii) Binadhan 14-V3 and iv) BRRI dhan58-V4. The treatments for date of harvesting were i) 20 days after flowering (DAF), ii) 27 DAF and iii) 34 DAF. The experiment was laid out in a split-plot design. The unit plot size was 4.0 m × 2.5 m. Variety was randomly placed in the main plot and date of harvesting in subplot. Each treatment was replicated thrice. Space between replications and between plots were 1.0 m and 0.5 m, respectively. There were 36 plots in the experiment. Seeds were directly sown in well prepared experimental field on 23 February, 2015. Planting space was 25 cm × 15 cm between the rows and seeds, respectively. All the fertilizers except urea were applied as basal at final land preparation. Urea was top dressed in three equal splits at 15, 30 and 45 DAS. Gap filling, weeding, irrigation and other necessary intercultural operations were done in proper time. The date of flowering was identified at different times for different varieties. The flowering date for BRRI dhan28, Hera hybrid2, BINA dhan14 and BRRI dhan58 were 18 May, 10 June, 22 May and 06 June 2015, respectively. Harvesting was done plot wise at 20, 27 and 34 DAF. Five hills were selected randomly from each unit plot for taking yield component data at harvest. One m² area from each plot was selected from the central portion and was cut manually from the ground level to take grain and straw yields. 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 grain was cleaned and dried to a moisture content of 14%. Straws were sun dried properly. Final grain and straw yields per plot were recorded and converted to tonnes per hectare. Data recorded for yield parameters were compiled and tabulated in proper form for statistical analysis. Analysis of variance was done following the split-plot design with the help of Computer Package MSTAT. The mean differences were compared with Duncan's Multiple Range Test (DMRT) (Gomez and Gomez 1984).

Source of Information: Fund Appl Agric 2016, 1(2): 66-69; ISSN: 2518-2021 (Print), 2415-4474 (Online)

Article Link (Online Journal): www.f2ffoundation.org/faa

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the results and discussion, it has been found that the highest grain yield (5.07 t ha-1 ) was obtained by BRRI dhan58 when it was harvested at 27 DAF. Therefore, it can be concluded that BRRI dhan58 has a great potentiality to produce a higher yield than other varieties and it should be harvested at 27 DAF for avoiding immature stage as well as shattering loss.

Knowledge Management: Journal