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Performance of Boro Rice Cv. BRRI Dhan28 as Influenced by Different Plant Establishment Methods and Weeding Regimes

Md Sojib Kabiraj
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Md Mamunur Rashid
Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Md Parvez Anwar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Md Delwar Hossain
Department of Agronomy, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

At present time food safety is a precedence issue in Bangladesh and it is essential to increase the production level of rice to address this mission. The study was undertaken to evaluate the yield performance of boro rice cv. BRRI dhan28 under different plant establishment methods and weeding regimes. The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from December 2017 to June 2018. It was a two-factor experiment that comprehended three plant establishment methods viz. sprouted seeds in line, sprouted seeds in broadcasting and transplanting of seedlings in line; five weeding regimes viz. no weeding, one hand weeding at 20 days after planting (DAP), two hands weeding at 20 and 40 DAP, three-hand weeding at 20, 40 and 60 DAP, and application of herbicide (Sathi 10WP @ 185 g ha-1). The experiment was set up following a randomized complete block design with three replications. Yield contributing characters and yield of Boro rice were exerted significantly by plant establishment methods and the highest results were recorded in transplanting of seedlings inline method in which the number of total tiller hill-1 (6.39), number of effective tiller hill-1 (5.93), grains panicle-1 (99.28), 1000 grain weight (24.16 g) and grain yield (4.19 t ha^-1). And the lowest results were found in sprouted seeds in the broadcasting method. Considering weeding regimes, the highest number of total tillers hill^-1 (6.03), effective tillers hill^-1 (5.28), grains panicle-1 (101.4), grain yield (4.12 t ha^-1) and straw yield (5.74 t ha^-1) were recorded with the application of herbicide method. Contrariwise, no weeding showed the lowest values. In interaction effect, maximum grain yield (4.48 t ha^-1) was obtained in transplanting of seedlings inline method with application of herbicide and Sprouted seeds in broadcasting method with no weeding was performed the lowest grain yield (2.86 t ha^-1). From the overall results, the growers can be recommended to cultivate boro rice cv. BRRI dhan28 in transplanting of seedlings inline method with application of herbicide at different Agro-ecological zones of Bangladesh.

Keywords: Boro rice, Plant establishment method, Weeding regime, Herbicide, Yield, BRRI dhan28

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

Start Date: 00-12-2017

End Date: 00-06-2018

Program Area: Crop-Soil-Water Management

Commodity: Rice, Weed management

Objectives:

To find out the yield performance of Boro rice cv. BRRI dhan28 under different plant establishment methods and weeding regimes.

Methodology:

The experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period in December 2017 to June 2018. The experiment consisted of three plant establishment method viz Sprouted seeds in line, Sprouted seeds in broadcast, Transplanting of seedlings in line and five weeding regimes viz. no weeding, one hand weeding at 20 DAP, two hands weeding at 20 and 40 DAP, three-hand weeding at 20, 40 and 60 DAP, and application of herbicide Pyrazosulfuron Ethyl. The experiment was laid out in randomized complete block design (RCBD) with three replications. Thus total number of the unit plots was 45. The space between blocks and between unit plots was 1.0 m and 0.75 m. The size of the unit plot was 10m2 (4.0 x 2.5 m). Seeds of BRRI dhan28 were collected in the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh. Seeds were soaked in water for 48 hours and kept for sprouting, then sprouted seeds were sown in 30 plots for direct seeding, 15 plots of them were placed with sprouted seeds in line continuously and 15 plots of them were sprouted seeds in the broadcast. Sprouted seeds were sown in 25 cm individual lines continuously and for the broadcast, sprouted seeds were randomly broadcasted on 12 December 2017. On the other hand for transplanting of seedling inline method sprouted seeds were broadcasted on prepared nursery bed in the same time/date i.e. on 12 December 2017. Forty-five days old seedlings were then transplanted on 27 January 2018 with 25 cm × 15 cm spacing at two seedlings per hill^-1. Weeding was done as per experimental treatments. In case of no weeding treatment, weeds were allowed to grow in the plots in sowing to harvesting of the crop. Other intercultural operations were done for ensuring and maintaining the normal growth of the crop. Harvesting was done when 90% of the grains turned yellow. The plants in one square meter area in the centre of the plot were harvested at ground level. The direct seeded mature plots were harvested on 25 May 2018. And the transplanted plots were harvest on 5 June, 2018. The crop was then separately threshed, grain and straws were sun-dried thoroughly and weights were recorded. Prior to the harvest, five hills were randomly selected in each unit plot to collect data on yield components. While it was completed to collect the data then the grains and straws in five sampling hills were added to the total grain and straw yield. All the recorded data were compiled and tabulated with the help of a computer package, MSTAT-C. The mean differences of the treatments were analyzed by the Duncan's Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: J Bangladesh Agril Univ 18(4): 934–940, 2020 ISSN 1810-3030 (Print) 2408-8684 (Online)

Article Link (Online Journal): https://doi.org/10.5455/JBAU.129791

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Results of the experiment concluded that the best performance was showed in transplanting of seedlings in line method with application of herbicide among the others for cultivation of Boro rice cv. BRRI dhan28. It was recorded the highest grain yield. Therefore, to get higher yield from BRRI dhn28, transplanting of seedling of seedlings inline method with application of herbicide may be recommended.

Knowledge Management: Journal