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Effects of Salinity on Morpho-physiological Attributes and Yield of Lentil Genotypes

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

N. A. Jahan, A. K. Sen
Former MS Student
Department of Crop Botany, BAU, Mymensingh

M. H. R. Pramanik
Professor
Department of Crop Botany, BAU, Mymensingh

Abstract/ Executive Summary:

A pot experiment was conducted at the pot yard of Bangladesh Institute of Nuclear Agriculture, Mymensingh to assess the effects of salinity on some morpho-physiological attributes and yield of lentil genotypes namely N1M-134 N1M-149, N1M-214, N5M-507, N5M-573, N4M-606, E4M-934, Binamasur-3, Barimasur-4 and L-5 during November 2005 to February 2006. Salinity levels viz.. control (only water), 4 dSm-' and 6 dSm' Salinity was developed by adding salt solution of NaCl, Na2SO4, NaHCO3, CaCl2, MgCl2, MgSO4 at 45 days after sowing. The experiment was laid out in randomized complete block design with three replications. The results showed that plant height, number of branches, number of leaves plant-1, leaf area, total dry matter, total chlorophyll content nitrate reductase activity in leaves, number of pods, number of seeds plant-1, 1000-seed weight, seed yield plant-1 and harvest index were gradually decreased with the increase in salinity level compared to control. However, total sugar and reducing sugar content in leaves increased with increasing salinity level. The the highest root dry weight, total dry matter, number of seeds and seed yield plant-1 under salinity were fond in N1.M-214 followed by N1M-507. So, these two genotypes indicated tolerance to salinity compared to other genotypes.

Keywords: Salinity, Lentil, Yield and Yield attributes

Location: Pot yard of BINA, Mymensingh

Start Date: 10-11-2005

End Date: 20-02-2006

Program Area: Risk Management in Agriculture

Commodity: Lentil

Objectives:

The objectives of the study were to assess the effects of salinity on lentil genotypes and to find out salt tolerant genotypes.

Methodology:

The experiment was conducted with 10 genotypes of lentil namely- N₁M-134 N₁M-149, N₁M-214, N₅M-507, N₅M-573, N₄M-606, E₄M-934, Binamasur-3, Barimasur-4 and L-5 at the pot yard of BINA, Mymensingh during the period from 10 November 2005 to 20 February 2006. A total of 180 (10x3 x3x2) plastic pots were used. Each pot contained 7.5 kg of dried soil of BINA farm. Urea, TSP and MP were applied as 0.09, 0.15 and 0 15 g respectively, at the rate of 18, 30 and 36 kg ha-1 of N, P, K, respectively. According to Burman et al (2002) six salts viz. NaCI, Na₂S0₄, NaHC0₃, CaCI₂, MgCI₂ and MgS04 were used at the percentage of 50, 15, 10, 10, 10 and 5, respectively. Separately, a total of 7.56 and 11.34 g salts were added to each pot at 45 days after sowing (DAS). Amount of salt calculation for salinity development was done according to Michael (1978) and Ponnamperuma (1984). Sixty FC was maintained of the soils in pots after application of salts. Then soil samples from different salinity treatments were analyzed. Average soil salinity was found 0.22 (Control), 4 and 6 dSm' approximately. The experiment was laid out in randomized complete block design with three replications. Data on biochemical parameters were recorded from harvested leaf samples of the lentil genotypes at 55 DAS. Total chlorophyll, nitrate reductase activity, total sugar and reducing sugar content in leaves were estimated following the methods of Amon (1949), Stewart and Orebamjo (1979), Dubois et al. (1956), Somogyi (1952) and Nelson (1944), respectively. Plants of one group were harvested at 60 DAS for morpho-physiological attributes and the other group was harvested at maturity for yield and yield attributes. Data were analyzed with statistical program MSTAT-C. Duncan's Multiple Range Test (DMRT) was used to compare the means.

Source of Information: Int. J. Sustain. Crop Prod. 7(l):l2-18(February 2012)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The lentil genotype N₅M-507 produced the highest root dry weight, total dry matter, number of seeds and seed yield plant^-1 under salinity. N₁M-214 also produced statistically similar yield to that of N₅M-507. So, these two genotypes indicated tolerance to salinity compared to other genotypes.

Knowledge Management: Journal