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Growth, Dry Matter Partitioning and Yield of Two Mungbean Genotypes in Response to Salinity Tolerance

Md. Abdul Aziz
SSO
Agronomy Division, BARI, Gazipur

M.A.Karim
Professor
BSMRAU, Salna, Gazipur

Abstract/ Executive Summary:

The experiment was conducted at the Environmental Stress Research Site of the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur to analyze the effects of NaCl salinity on growth pattern, dry matter partitioning and yield of two mungbean genotypes differing in salt tolerance.The effect of NaCl salinity on growth, dry matter partitioning and yield of two mungbean genotypes was determined in pot culture experiment. TDM of BM 21 decreased more remarkably compared to that of BM 01. The reduction in TDM was attributed to low dry weight of root, leaf, stem and reproductive organ due to the stress. Higher the salinity levels lower was the grain yield per plant . Average grain yield in BM 01 decreased slowly with the increasing salinity levels, till 50 mM NaCl. The grain yield in BM 21 showed a drastic reduction even at 50 mM NaCl and reached from 18.07 g/plant in control to only 2.38 g/plant at 100 mM NaCl. Although most of the yield contributing characters contributed for the yield reduction per plant under saline conditions, the contribution of the seriously affected number of pods per plant was the highest. BM 01 was more salt tolerant than BM 21, in terms of growth and grain yield production.

Keywords: Growth, Dry matter partitioning, Yield, Mungbean, Salinity tolerance

Location: BSMRAU, Salna, Gazipur

Start Date: 12-03-1999

End Date: 15-06-1999

Program Area: Variety and Species

Commodity: Mungbean

Objectives:

To analyze the effects of NaCl salinity on growth pattern, dry matter partitioning and yield of two mungbean genotypes differing in salt tolerance.

Methodology:

The experiment was conducted at the Environmental Stress Research Site of the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur. Seeds of two mungbean genotypes, BM 01 (tolerant one) and BM 21 (susceptible one) selected by screening in previous experiment, were sown on 5th September 2004 in earthen pots in the vinylhouse. Each pot was filled with 12 kg air-dried soil. Compost (1/4th of the soil volume) and 0.27, 0.28 and 0.20 g urea, TSP and MP respectively per pot were incorporated uniformly into the soil. The pots were irrigated with tap water until the seedlings were well established. The trial was carried out in a factorial completely randomized design with six replications. NaCl solutions were applied every alternate day at an increment of 12.5 mM until the respective final concentrations, 50, 75, and 100 mM were attained for each treatment. The treatment solution was applied with irrigation water until maturity. Plants in the control group were irrigated with tap water. Six plants were used in each treatment for the measurement of agronomic parameters. Sampling was done at a ten-days interval from 25 days after emergence (DAE) till maturity. After harvesting, roots were separated from the plants and washed with tap water. The plant parts were segmented into leaf, stem and reproductive organ (flowers + pods). The samples were oven-dried at 70⁰C to a constant weight. Yield components and grain yields were determined at maturity. Each treatment consisted of 6 replicated plants. The data was analyzed by ' MSTAT ' program and the treatment means were compared by LSD.

Source of Information: Ph.D Thesis, BSMRAU, Salna, Gazipur

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 20,000/-

Total Budget (Tk.) : 20,000/-

Achievement/Findings:

Higher the salinity levels lower was the grain yield per plant . Average grain yield in BM 01 decreased slowly with the increasing salinity levels, till 50 mM NaCl. BM 01 was more salt tolerant than BM 21, in terms of growth and grain yield production.

Knowledge Management: Report/Proceedings