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Salt Induced Changes in Dry Matter Accumulation and Yield of Mustard (brassica Juncea)

M. M. Zaman
Regional Training Coordinator
USAID Agriculture Extension Project, Jessore.

M. A. Mannan
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706.

S. C. Samanta
Department of Agronomy, Patuakhali Science and Technology University, Patuakhali-8602.

Abstract/ Executive Summary:

The experiment was laid down to identify mustard [Brassica juncea (L.) Czern & Coss] genotype tolerant to soil salinity in relation to shoot and total dry matter (root+shoot) plant^-1, number of siliqua plant^-1, number of seed siliqua^-1, 1000-seed weight and seed yield plant^-1. Four genotypes (BD 9080, BARI Sarisha16, BD 9109 and BD 9107) were evaluated at three levels of NaCl salinity, viz. 0 (normal), 50 and 100 mM. All of the mustard genotypes showed decreasing trend with respect to all of the above mentioned crop parameters with salinity over normal water and the decreasing rate of the parameters was higher with the increasing salinity levels. Among the genotypes, BD 9080 showed the best performance with respect to above mentioned characters at all levels of salinity, while BD 9107 performed the poorest. Thus, genotype BD 9080 proved to be more tolerant to salinity than other genotypes.

Keywords: Mustard, Salinity, Irrigation water, Dry matter, Seed yield

Location: Department of Agronomy, Patuakhali Science and Technology University, Patuakhali, Bangladesh

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Variety and Species

Commodity: Mustard

Objectives:

To examine the salt-induced modulation in the dry matter accumulation and yield in salt-tolerant and salt sensitive mustard genotypes.

Methodology:

An experiment was conducted in earthen pots of 24 cm in diameter and 30 cm in height in net house under semi controlled environment (inside plastic house) and natural light in the Department of Agronomy, Patuakhali Science and Technology University, Patuakhali, Bangladesh during Rabi 2011-12. Each pot was filled with mixture of 12 kg air-dried soil, compost (25% of the soil volume) and 0.35-0.38-0.22 g of urea, TSP and MOP. Ten uniform bold seeds of four mustard genotypes viz.BD 9080, BARI Sarisha16, BD 9109 and BD 9107 were sown at first week of October 2011. The soil used in experiment was clay loam in texture having pH 6.9, ECe0.33 dS/m, ESP 8.2 per cent, CEC 16.69 cmol_c kg^-1 dry soil and organic carbon 0.55 per cent. After seedling establishment, five uniform and healthy plants were allowed to grow. Intercultural operations, weeding and pest control measures were taken properly when necessary. At autotrophic stage, sufficient quantities of salt solution were applied in treated pot. Salt solution was prepared artificially by dissolving calculated amount of commercially available NaCl with tap water to make 50 and 100 mM NaCl solution which electrical conductivity (EC) were equivalent to 5 and 10 dS/m, respectively. To avoid salt stress shock, the salt solution was applied with an increment of 25 mM in every alternate day till respective concentrations were attained. Plants in control group were irrigated with tap water (normal). The salt solutions were applied till harvest. The experiment carried out in Completely Randomized Design with four replications. The observations on shoot and total dry matter per plant, number of siliqua per plant, number of seeds per siliqua, 1000-seed weight and seed yield per plant were recorded. The data recorded for different parameters were statistically analyzed using MSTAT-C computer program and mean differences were adjusted by LSD technique.

Source of Information: Bangladesh Agron. J. 2015, 18(1): 65-70

Article Link (Online Journal): Online Journal

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All of the mustard genotypes showed decreasing trend with respect to all of the above mentioned crop parameters with salinity over normal water and the decreasing rate of the parameters was higher with the increasing salinity levels. Among the genotypes, BD 9080 showed the best performance with respect to above mentioned characters at all levels of salinity, while BD 9107 performed the poorest. Thus, genotype BD 9080 proved to be more tolerant to salinity than other genotypes.

Knowledge Management: Journal