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Effect of Salinity on Morpho-physiological and Biochemical Attributes of Jute Genotypes at Early Vegetative Stage

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

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

M. A. Karim
Professor
Department of Crop Botany, BAU, Mymensingh

Abstract/ Executive Summary:

A pot culture experiment was carried out to assess 8 jute genotypes at early vegetative stage under 3 and 6 dS/m soil salinity with a control where no salt was applied. Jute genotypes viz., CM-107, P-26 (5), CM-61, CM-67, CM 652, Bmadeshipat-2, CM-443 and P-81 (2) were included m the study. Plant height, number of leaves, leaf area, root, stem, leaf weight, root-shoot ratio total dry matter per plant, crop growth rate, total chlorophyll, Na⁺ K⁺ and Mg⁺⁺ contents in leaves decreased with the increase in salinity levels compared to control. Relative growth rate, net assimilation rate, Ca⁺⁺ content, total nitrogen, total sugar and reducing sugar in leaves were almost unchanged with the salinity levels. Plant height and number of leaves were the the in the jute genotype CM-443. Root dry weight, root-shoot ratio and total dry matter per plant were the highest in the genotype P-26 (5). Crop growth rate, total nitrogen and sugar were higher in CM-443. Under the salinity treatments, CM-443 performed better with respect to morpho-physiological and biochemical parameters followed by P-26(5), P-81 (2) and CM-67.

Keywords: Jute, Salinity, Early growth stage

Location: BINA, Mymensingh

Start Date: 13-04-2005

End Date: 15-08-2005

Program Area: Risk Management in Agriculture

Commodity: Jute

Objectives:

The objectives of the study were to assess the effects of salinity on jute genotypes and to identify salt tolerant genotype.

Methodology:

An experiment was carried out to assess 8 jute genotypes, CM-107, P-26(5), CM-61, CM-67, CM-652, Binadeshipat-2, CM-443 and P-81 (2) under different levels of salinity. The experiment was conducted in plastic pots in randomized complete block design with three replications. Each pot contained 8 kg sun dried soil. Fertilizers were applied at the rate of 0.19 g P₂O₅, 0.22 g K₂O and 0.06 g SO₄ per pot, which correspond to 60 kg, 50 kg, 60 kg and 20 kg as urea, TSP, MP and gypsum per hectare, respectively. Jute seeds were sown in each pot on 13 April 2005. Salinity treatments were applied following Michael, 1978 and Ponnamperuma, 1984 by adding different amount of sodium chloride (NaCl) salt to pot soils at 20 days after sowing. The salinity treatments were; To = Control, where no salt was added, average EC of the initial pot soil was found 0.43 dS/m. T₁ = Where 8.6 g NaCl was added to each pot soil, average EC value of the soil was found approximately 3 dS/m. T₂ = Where 17.2 g NaCI was added to each pot soil, average EC value of the soil was found approximately 6dS/m. Data on morpho-physiological, growth and biochemical attributes were recorded. Crop growth rate, relative growth rate and net assimilation rate were calculated following the formula of Radford (1967). Total chlorophyll, sugar, nitrogen and reducing sugar in leaves were estimated following Amon (1949), Dubois et at. (1956), Kjeldahl and Somogyi-Nelson method, respectively. Na⁺, K⁺, Ca⁺⁺ and Mg⁺⁺ contents in leaves of the harvested plants were determined by atomic absorption spectrophotometer (Model-PERKIN-ELMER, 2380) directly in percentages. Data were analyzed with statistical program, MSTAT-C. Duncan's Multiple Range Test (DMRT) was used to compare the means.

Source of Information: Bangladesh J. Nuclear Agric. 21 & 22: 17-25, 2006

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Under the salinity treatments, the jute genotype CM-443 performed better with respect to morpho-physiological and biochemical parameters followed by P-26(5), P-81 (2) and CM-67.

Knowledge Management: Journal