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Impact of Different Colored Polythene Shades on Growth and Yield of Okra

M. M. Rahman
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

M. S. Rahman
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

M. M. Rahman
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

The experiment was performed in pots at the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, during the period from April to August, 2005 to evaluate the effect of different colored polythene shades on the growth and yield of okra cv. BARI Dherosh-1. Three different shades viz. red, yellow and blue polythene shades with a control (non-shade natural sunlight) were used as treatment in the experiment. The experiment was laid out in Randomized Complete Block Design (RCBD) with four replications. The results revealed that all the morpho-physiological parameters, yield and yield contributing characters were significantly influenced by different colored polythene shades. Red colored shade showed the best performance to produce the highest plant height, number of leaves plant^-1 total dry weight, LAI, CGR, RGR, number of green fruits plant^-1, fruit length, fruit diameter, fruit yield, number of seeds per fruit, 1000-seed weight and seed yield followed by blue colored shade. The effect of yellow colored shade on the above mentioned parameters were more or less identical to that of the non-shaded control plants which showed the lower performance than the shaded plants

Keywords: Colored polythene shades, Growth, Yield, Okra.

Location: Mymensingh

Start Date: 01-04-2004

End Date: 01-08-2004

Program Area: Crop-Soil-Water Management

Commodity: Okra

Objectives:

To evaluate the effectiveness of colored polythene shades (i.e. light on the growth and yield of okra and to assess which polythene shade suit well for better yield of okra.

Methodology:

The experiment was conducted at the field laboratory of the Department d Botany, Bangladesh Agricultural University, Mymensingh, from April to August, investigate the effect of different colored polythene shades on the growth and .okra (cv. BARI Dherosh-1). There were 4 treatments such as no shade (natural sunlight), red polythene shade, yellow polythene shade and blue polythene shade. The experiment was laid out in Randomized Complete Block Design (RCBD) with 4 replication. The experimental field was divided into 4 blocks considering as 4 replications and each consisted 4 plots and each plot contained 10 pots. For each treatment, four plants were harvested from 35 DAS to 1050 days interval. After recording plant height and number of leaves per plant, plant were separated into root, stem, leaf and fruit (after fruit initiation) and their dry weight were recorded. Leaf area of the plant was measured by an automatic leaf area (Model LI-3000). The measures of plant growth viz. leaf area index (LA I), crop growth rate (CGR) and relative growth rate (RGR) were calculated using standard formulae given by Hunt (1978). Green fruits were harvested at 4 days interval when they edible stage (i.e. the tender fruits of 8-14 cm long). Green fruits number plant^-1length, diameter and weight were recorded. For seed production fruits were harvested by hand pulling when the fruits dried and turned greyish and was about to shatter. Then the number of seeds per fruit and 1000 seed weight were recorded after proper drying in the sun. The collected data on different parameters were analyzed statistically and the significance of difference between the pairs of treatment means was evaluated by Duncan's Multiple Range Test (DMRT).

Source of Information: Bangladesh j. crop scl. 2006, 17 (1): 221-228

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The results of the present experiment revealed that growth, yield and yield contributing characters were positively influenced by different colored polythene shades than those of the non-shaded control plants. Among the shades, red colored polythene shade was found better compared to the other shades. Different colored polythene shades changes the light into different spectrum. All these spectrum of light are not equally important to the plants for photosynthesis. The best performance of red light on growth and yield contributing characters of okra might be due to its higher photosynthetic effective than that of blue or other color of light

Knowledge Management: Journal