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Effect of Nursery Seeding Density, Age of Seedling and Number of Seedlings Hill−1 on the Performance of Short Duration Transplanted Aus Rice (cv. Parija)

Swapan Kumar Paul
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Mukta Akter
Department of Agricultural Extension, Dhamrai, Dhaka, Bangladesh

Shubroto Kumar Sarkar
Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

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

Abstract/ Executive Summary:

The cultivar Parija is a short duration transplanted Aus rice, which can be cultivated in between Boro and transplanted Aman rice without hampering their yield. Hence, research work on proper agronomic practices warrant due attention to augment the grain yield of this cultivar. An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during April to July 2012 to examine the effect of nursery seeding density, age of seedling and number of seedlings hill⁻¹ and their effects on the yield components and yield of short duration transplant Aus rice (cv. Parija). The experiment consisted of two nursery seeding densities viz. 40, 80 g seeds m−2, three ages of seedlings viz. 20-, 30- and 40-day old and three levels of seedlings hill⁻¹viz. 2, 4 and 6 seedlings hill^−1. The experiment was laid out in a Randomized Complete Block Design with three replications. The results showed that the treatments 40 g seed m⁻²× 30-day old seedlings × 4 seedlings hill⁻¹ individually had significant effect on the total tillers hill⁻¹, effective tillers hill⁻¹, grains panicle⁻¹ and sterility percentage. In consequence, the highest grain yields of 3.28, 3.35 and 3.5 t ha⁻¹ were found at 40 g seed m^−2, 30-day old seedlings and 4 seedlings hill^−1, respectively. In case of interaction the highest grain yield (4.22 t ha⁻¹) was found in 40 g seed m−2 × 30-day old seedlings × 4 seedlings hill⁻¹ which was at par with the interaction of 40 g seed m⁻²× 30-day old seedlings × 6 seedlings hill⁻¹ (3.84 t ha⁻¹) and 80 g seed m⁻² × 30-day old seedlings × 4 seedlings hill⁻¹. Considering both the individual and cumulative significant effects of the treatments on the yield components and grain yield, the use of 40 g seed m⁻², 30-day-old seedlings and 4 seedlings hill⁻¹ could improve the yield components and grain yield of short duration transplanted Aus rice (cv. Parija). Therefore, short duration transplanted Aus rice (cv. Parija) can be cultivated maintaining a nursery seeding density of 40 g seed m⁻² and 30-day old seedlings with 4 seedlings hill⁻¹ for obtaining maximum grain yield.

Keywords: Yield, yield components, Rice, Seedlings

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-04-2012

End Date: 00-07-2012

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

This study was undertaken to find out the effect of nursery seeding density, age of seedlings and number of seedlings hill⁻¹ on the yield components and yield of short duration transplanted Aus rice (cv. Parija).

Methodology:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during April to July 2012 to study the effect of seeding density in nursery bed, age of seedling and number of seedlings hill^–1 on the yield components and yield of short duration transplanted Aus rice (cv. Parija). The experimental site is located at 24075´ N latitude and 90050´E longitude having an altitude of 18 m. The site belongs to the Sonatala series of Old Brahmaputra Floodplain Agroecological Zone (AEZ-9) having non-calcareous dark grey floodplain soils (UNDP and FAO, 1998). The land was medium high having sandy loam texture with low organic matter content and pH 6.8. The study comprised two seeding densities viz. 40, 80 g seeds m⁻², three ages of seedlings viz. 20-, 30- and 40-day old and three levels of seedlings hill⁻¹ viz. 2, 4 and 6 seedlings hill⁻¹. The experiment was laid out in a Randomized Complete Block Design with three replications. The net size of each unit plot was 4.0 m × 2.5 m. A short duration local variety of Aus rice cv. Parija was used as the test crop. Sprouted seeds were broadcasted uniformly in a well prepared nursery bed on 26 March, 5 April and 15 April. The land was first opened with a tractor driven ploughing followed by cross ploughing with a country plough and leveled using a ladder. Weeds and stubble were removed from the field as much as possible after leveling. The lands were finally prepared and the plots were laid out on 7 May. In addition to nitrogen a basal dose for each of triple super phosphate, muriate of potash, gypsum and zinc sulphate at the rate of 90, 60, 38 and 8 kg ha^–1, respectively were applied in all plots. Nitrogen fertilizer in the form of urea was applied in two equal splits at 10 and 30 days after transplanting (DAT). As per experimental specification 20, 30 and 40 day old seediling were transplanted on 8 May maintaining 20 cm × 15 cm spacing using specified seedlings hill^–1. Constant water depth of 5–7 cm was maintained in the experimental field throughout the growing period. The crop was harvested at full maturity when 90% of the grain became golden yellow in color. Five hills (excluding border rows and central 1 m² harvest area) were selected randomly from each unit plot and uprooted for recording data on crop characters and yield components. After sampling a harvest area of central 1m × 1m was selected from each unit plot and harvested on 28 June. The harvested crop of each plot was separately bundled, properly tagged and then brought to threshing floor. The crop was threshed by pedal thrasher and the fresh weights of grains straw were recorded plot wise. The grains were cleaned and sun dried to a moisture content of 14%. Finally grain and straw yields plot–1 were recorded and converted to t ha^–1. The harvest index was computed.

Data on different parameters were compiled and tabulated in proper form for statistical analysis. Analysis of variance was done with the help of computer package MSTAT. The mean differences among the treatments were adjudged with Duncan’s Multiple Range Test (Gomez and Gomez, 1984).

Source of Information: J Bangladesh Agril Univ 16(2): 215–220, 2018

Article Link (Online Journal): doi: 10.3329/jbau.v16i2.37963

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The findings of the study suggest that 30-day old seedlings raised from nursery seeding density of 40 g seed m⁻² could be transplanted with 4 seedlings hill⁻¹ to obtain the highest grain yield of short duration transplanted Aus rice (cv. Parija).

Knowledge Management: Journal