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Allelopathic Effect of Eucalyptus Camaldulensis Leaf Extract on Germination and Growth of Mungbean

M. G. Miah
Department of Agroforestry and Environment, Bungabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh

D. P. Khasa
Department of Wood and Forest Sciences, Universitc Laval, Quebec, Canada

N. S. Sarmin
Department of Agroforestry and Environment, Bungabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh

M. A. Rahman
Department of Agroforestry and Environment,Bungabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh

Abstract/ Executive Summary:

Allelopathic effect of Eucalyptus leaf extract on mungbean was studied for making a good compatible tree-crop association; two separate experiments were conducted during 2009. The first experiment on germination of mungbean seeds was conducted in growth chamber of the Department of Wood and Forest Sciences, Laboratory of the Centre for Forest Research (CFR), Universite Laval, Quebec, Canada. The second pot experiment was conducted in the field of the Department of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University. Bangladesh to observe the growth performance of mungbean. The study consisted of seven treatments having different aqueous extracts i.e. 0% (control), 1.5 , 5.0, 7.5, 10.0, 12.5 and 15.0 % of eucalyptus leaves. In seed germination experiment, both rate of germination and radicle growth in lower concentration treatments showed better performance than in higher concentration treatments, while no significant variation was observed between 0% and 2.5% aqueous extract solutions. In growth study, all parameters of mungbean performed better in lower aqueous concentration treatment and the performances were found gradually poor with increasing the concentrations. Regarding weed growth, the highest weed biomass (0.42 g/pot) was recorded in control (0%) treatment, which was decreased drastically when leaf extract solution was applied. Interestingly, no weed was grown at 15.0% aqueous extract solution. The study suggest that Eucalyptus leaf extract at lower concentration may not have negative effect on mungbean germination and growth, while higher concentration might have great potential for use in organic weed control strategies.

Keywords: EIlelopathic effect, Eucalyptus, Mungbean.

Location: Growth chamber of the Department of Wood and Forest Sciences, Laboratory of the Center for Forest Research (CFR), Universite Laval, Quebec, Canada and Department of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University. Bangladesh

Start Date: 00-09-2009

End Date: 00-12-2009

Program Area: Crop-Soil-Water Management

Commodity: Mungbean

Objectives:

To study the effect of Eucalyptus leaf extract on t he germination and growth of mungbean.

Methodology:

Seed germination and radical growth study was conducted in the growth chamber of the Department of Wood and Forest Sciences, Laboratory of the Center for Forest Research (CFR), Universite Laval, Quebec, Canada. Plant growth study was conducted in pots at the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh. The studies were conducted from September to December 2009. Mature leaves of Eucalyptus camaldulensis species were sundried on at thrashing floor for seven days. The dried leaves were then grinded and made in to powder using an electrical grinder. The study consisted of seven treatments having different aqueous extracts.

Source of Information: Ann. Banladesh Agric. (2010) 14 (1&2): 9-20

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Germination of mungbean seeds was significantly influenced by different concentrations of Eucalyptus leaf for seed germination (Singh and Singh, 2003). The highest germination rate (81%) was noted in distilled water (0%) treatment, which was statistically similar with 2.5% aqueous extract solution treatment (79%). Seed germination rate, however, was decreased with the increasing concentrations of leaf extract and the lowest germination rate (56%) was observed in the highest concentration i.e. 15% aqueous extract solution treatment.

Knowledge Management: Journal