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Effect of Spacing on Yield and Yield Contributing Characters of Stem Amaranth

A. U. Ahammed
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh.

M. M. Rahman
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh.

M. M. Hossain
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh.

Abstract/ Executive Summary:

An experiment on stem amaranth (CV. SA040) comprising nine levels of spacing was conducted at the experimental field laboratory, Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh during March 2008 to July 2008 to find out an optimum plant and row spacing for higher yield of stem amaranth. Plant height, leaves/plant, leaf weight/plant, stem weight/plant, stem diameter, stem yield (t/ha), dry matter (%), days to first flowering and 50% flowering, seed yield/plant and seed yield (t/ha), and 1000-seed weight were significantly influenced by different spacing treatments. The maximum stem weight/plant was obtained from widest spacing i. e., S9 (40 cm x 20 cm). whereas, minimum was found in the closer spacing S₁(20 cm x 10 cm). However, the stem yield decreased significantly with the increase in plant spacing. The highest stem yield (138.53 t/ha) was obtained from plant spacing 20 cm x 10 cm and the lowest (46.73 t/ha) was obtained from plant spacing 40 cm x 20 cm. The maximum seed yield (3.01 t/ha) was obtained from 30 cm x 20 cm plant spacing followed by that of 30 cm x 15 cm spacing (2.79 t/ha) and the lowest (4.09 t/ha) was obtained from closer spacing 20 cm x 10 cm. A positive linear relationship was obtained between plant height and stem yield. A negative linear relationship was found between stem yield/plant and leaf: stem ratio with stem yield.

Keywords: Amaranth, Plant population, Stem production, Seed production.

Location: Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh .

Start Date: 00-03-2008

End Date: 00-07-2008

Program Area: Variety and Species

Commodity: Amaranth

Objectives:

To find out optimum spacing of sowing for the production of stem amaranth.

Methodology:

The experiment was conducted at the experimental field laboratory, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh during March 2008 to July 2008. Amaranth genotype SA040 was selected for summer and winter seasons and used as plant material for the study (Ahammed, 2009). The treatments consisted of nine levels of spacing viz., S₁- 20 cm x 10 cm, S₂- 20 cm x 15 cm, S₃- 20 cm x 20 cm, S₄- 30 cm x 10 cm, S₅- 30 cm x 15 cm, S₆- 30 cm x 20 cm, S₇- 40 cm x 10 cm, S₈- 40 cm x 15 cm and S₉- 40 cm x 20 cm. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The unit plot size was 2.40 m x 1.8m. The unit plot and blocks were separated by 0.5m and 1.0m, respectively. Seeds of genotype SA040 were continuously sown on 29 March 2008 between rows maintaining spacing according to treatments after 15 days of sowing. The crop fertilization and necessary intercultural operations were done following Rashid (1999). The crop was harvested when started flowering. The data were recorded on the basis of IBPGR descriptor. The following parameters, such as plant height (cm), leaves/plant, stem diameter (mm), leaf weight/plant (g), stem weight/plant (g), leaf: stem ratio, stem yield (t/ha), fibre (%), dry matter (%), days to first flowering, days to 50% flowering, seed yield/plant, seed yield (t/ha) and 1000-seed weight (g), were taken for consideration. Recorded data on different parameters were analyzed statistically and the means were separated by DMRT (Gomez and Gomez, 1984) at 5% level of probability.

Source of Information: Ann. Bangladesh Agric. (2014) 18 (1): 115-124; ISSN 1025-482X

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Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the study, it may be concluded that different spacing treatments had considerable effect on growth, stem yield, and seed yield of amaranth. Spacing of 20 cm x 10 cm was found better for stem production and spacing of 30 cm x 20 cm found for seed production. A positive linear relationship was obtained between plant height and stem yield. A negative linear relationship was found between stem yield/plant and leaf: stem ratio with stem yield.

Knowledge Management: Journal