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Effect of Salt Stress on Growth and Yield of Mungbean

A. K. M. M. Rahman
Former MS Student
Department of Environmental Science, BAU, Mymensingh

M. M. Hossain
Former MS Student
Department of Crop Botany, BAU, Mymensingh

Dr. Md. Tariqul Islam
Principal Scientific Officer and Head
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, BAU Campus, Mymensingh-2202, Bangladesh

M. E. Haque
Bangladesh Institute of Nuclear Agriculture, Mymensingh

Abstract/ Executive Summary:

A pot experiment was performed at the Bangladesh Institute of Nuclear Agriculture Mymensingh, during the period from 06 October 2003 to 08 January 2004 to observe the response of three mungbean genotypes (Binamoog-4 and two advanced lines, BMX 92007-3 and BMX 94010-11) under different salt stress: control, 3.89 and 7.82 dS/m. The experiment was laid out following Randomized Complete Block Design with 3 replications. All morpho-physiological characters and yield contributing characters were reduced with the increase of salinity levels compared to control. Plant height and yield attributes like number of pods. number of seeds/pod, seed weight/plant 1000-seed weight, harvest index were highest in advanced line BMX 94010-11 compared to those in Bmamoog-4 and advanced line BMX 92007.3. Interaction effect between the genotypes and salinity levels appeared significant for most of the studied characters. From the study it can be opined that salt stress reduced all the parameters under different salinity levels. Again among the genotypes advanced line BMX 94010-H was found as relatively salt tolerant.

Keywords: Salt stress, Growth, Yield, Mungbean

Location: Bangladesh Institute of Nuclear Agriculture, Mymensingh

Start Date: 06-10-2003

End Date: 08-01-2004

Program Area: Risk Management in Agriculture

Commodity: Mungbean

Objectives:

To observe the response of mungbean genotypes under salt stress and to find out stress tolerant genotype.

Methodology:

A pot experiment was carried out under varying levels of imposed soil salinity with three mungbean genotypes at the pot yard of Bangladesh Institute of Nuclear Agriculture, Mymensingh during the period from 06 October, 2003 to 08 January, 2004. The soil of the experimental pot was collected from 0-15 cm depth from the BINA farm. Three genotypes of winter mungbean viz., Binamoog-4, MX-92007-3 and BMX-94010-11 were used. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Different fertilizers and manures were applied in each pot as follows: Cow dung @ 10 t/ha. Urea @ 25kg/ha, TSP @ 74 kg /ha and MP @ 50kg t/ha. The seeds were sown on 6th October, 2003. Three levels of salinity treatments were imposed by adding different amounts of sodium chloride to pots. The required amount of salt was applied in 2 equal splits at weekly intervals with a view to gradual development of salinity in the soils. The treatments were: T₀ = control (where no salt was added to the soils), T₁= salinity maintain as 4 dS/m, T₂ = salinity maintain as 8 dS/m. The first split of the salt solution was applied at 36 days old plant while the other split of salt solution in the following week. After 48 hours, the soils in the pots were analyzed and the average soil salinity (EC) was found 0.213 dS/m, 3.89 dS/m and 7.82 dS/m for To, T₁ and T₂, respectively. The collected data were statistically analyzed following Randomized Complete Block Design (RCBD) to find out the levels of significance using the MSTAT - C package program developed by Russel (1986). The mean differences were compared by Duncan's Multiple Range Test at 5 level of significance.

Source of Information: Bangladesh J. Soil Sci. 30(1-2): 55-60,2004, ISSN 0253-5440

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The finding of the evident that the increase in soil salinity reduced the plant height, number of leaves/plant, leaf area/plant, number of pods/plant, and number of seeds/plant, seed weight/plant, and 1000-seed weight/plant and harvest index. The highest Na+ content was at 7.82 dS/m and the lowest at control treatment. The highest K+ content was obtained under control condition and the lowest K+ content was found at 7.82 dsm^-1 salinity level. Considering the performance of mungbean genotypes with salt treatment, advanced line BMX 94010-11 performed better than that of Binamoog-4 and advanced line BMX 92007-3. For definite recommendations further research works will be needed. Salt stress reduced all the parameters of the mungbean genotypes. Again among the genotypes advanced line BMX 94010-11 was found as relatively salt tolerant.

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