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Effect of Growth Regulator on Morphological Attributes of Mungbean Under Irrigated and Nonirrigated Conditions

M. J. I. Shohag
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

M. A. Karim
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

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

Abstract/ Executive Summary:

This study was conducted with mungbean (Vigna radiata L.) during the period from February to May, 2007 to investigate the effect of two levels of irrigation (Irrigated and non-irrigated) and five concentrations of growth regulator (0, 50, 100, 150 and 200 ppm NAA) on morphological parameters viz., plant height, root length, number of branches plant^-1, number of leaves plant^-1. Irrigation showed significant effect on all these parameters except some genetically regulated characters. Among the concentrations of growth regulator, 200 ppm NAA showed remarkable results on almost all these parameters. The interactions between irrigation and PGR showed better performance in most cases. The results revealed that NAA might be used under irrigated condition for better performance on morphological characters of mungbean.

Keywords: Growth regulator, Morphological attributes, Mungbean, Irrigation

Location: Field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh

Start Date: 00-02-2007

End Date: 00-05-2007

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

1. To study the individual and interaction effects of plant growth regulators (NAA) and irrigation on morphological characters in mungbean; and 2. To find out the suitable concentration, and combination of NAA and irrigation for best performance on growth of mungbean.

Methodology:

The experiment was conducted at the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, during the period from February to May 2007. The experiment comprised of two factors with 2 different irrigation levels viz., I₀ (Control, no irrigation), I₁ (Irrigation was applied once, at 22 DAS) and 5 concentrations of NAA viz., 0 ppm (control), 50 ppm, 100 ppm, 150 ppm and 200 ppm. The cultivar of mungbean, BINAmoog-5 used in this experiment, was collected from Bangladesh Institute of Nuclear Agriculture (BINA), NAA (Naphthalene acetic acid) was collected from Prof. Dr. M.A. Karim, Department of Crop Botany, Bangladesh Agricultural University, Mymensingh. The experiment was laid in a Randomized Complete Block Design (RCBD) with three replications. The size of unit plot was 2m² (2m× 1m). The plot to plot distance was 0.5m and block to block distance was 0.5m. The plots were raised up to 15 cm from the soil surface. The seeds of mungbean were hand sown at 3 cm depth at a spacing of 30 cm × 20 cm. The experimental area was fertilized at a rate of 35 kg urea ha^-1, 75 kg TSP ha^-1, 40 kg MP ha^-1. Intercultural operations like weeding, thinning, gap filling and pesticides were applied as and when required. Five plants from central guarded rows were uprooted randomly from each plot starting from 30 DAS and continued till maturity on 80 DAS with interval of 10 DAS and dug carefully for collecting data on important morphological parameters such as plant height, root length, number of branch plant^-1 and number of leaves plant^-1. All the collected data were analyzed following the analysis of variance (ANOVA) technique and mean difference were adjudged by DMRT

Source of Information: J. Agrofor. Environ. 2(1): 1-6, 2008; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Irrigation showed significant effect on all these parameters except some genetically regulated characters. Among the concentrations of growth regulator, 200 ppm NAA showed remarkable results on almost all these parameters. The interactions between irrigation and PGR showed better performance in most cases. The results revealed that NAA might be used under irrigated condition for better performance on morphological characters of mungbean.

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