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Morphological Performances of BINA Soybean 6 (glycine Max) at Several Salinity Stress Concentrations in Coastal Region of Bangladesh

Fariha Ahmed Trina
Department of Agriculture, Noakhali Science and Technology University, Noakhali-3814, Bangladesh.

Rayhan Ahmed
Department of Agriculture, Noakhali Science and Technology University, Noakhali-3814, Bangladesh.

Roksana Aftab Ruhi
Department of Agriculture, Noakhali Science and Technology University, Noakhali-3814, Bangladesh.

Md. Istiak Hossain Joy
Department of Agriculture, Noakhali Science and Technology University, Noakhali-3814, Bangladesh.

Mahrin Binta Jahir Maliha
Department of Agriculture, Noakhali Science and Technology University, Noakhali-3814, Bangladesh.

Abstract/ Executive Summary:

A pot experiment was conducted from 2019 to 2020 at Noakhali Science and Technology University (NSTU), Noakhali, Bangladesh, to investigate the morphological performances of BINA Soybean-6 under various saline conditions. Salinity is a widespread problem responsible for limiting the productivity of oilseed crops and soybean cultivars differ in their sensitivity to soil salinity. The research material was BINA Soybean-6 collected from the Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh. There were five treatments of salinity viz., T₀ (distilled water), T₁ (50mMNaCl), T₂ (100mMNaCl), T₃ (150mMNaCl), and T₄ (200mMNaCl) were used in the experiment in which distilled water was used as control. Latin Square Design (LSD) with three replications was used in this experiment. In the present study, BINA Soybean 6 showed a significant variation in the contributing parameters. The experimental parameters used during the experiment were germination percentage and duration, the height of plants (cm), number of branches/plant, number of leaves/plant, number of flowers/plant, number of pods/plant, length of pods (cm), seeds/pod, and length of root (cm). The highest germination percentage (83.33%) was observed in the control (T₀) condition while germination percentage was suppressed under T₄ treatment i.e. 200mMNaCl concentration. Germination percentages were gradually decreased with the increase of salinity level. The highest plant height (34.22 cm), number of branch plant^-1 (3.44), leaf number plant^-1 (13.56), number of flower plant^-1 (24.33), pod number plant^-1 (21.22), seeds pod^-1 (3.33), length of the pod (5.44 cm) and root length (15.89 cm) were obtained at control (T₀) condition. It was observed that the parameters were diminished gradually with the rising of salinity levels compared to the treatment T₀ (Control).

Keywords: Soybean, Saline stress, Parameters, Growth, Development.

Location: Noakhali Science and Technology University (NSTU), Noakhali, Bangladesh.

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Crop-Soil-Water Management

Commodity: Soil salinity, Soybean

Objectives:

To determine the impacts of several levels of salinity (NaCl) on the growth, development, and other morphological attributes of BINA Soybean 6 in saline areas.

Methodology:

The experiment was conducted at Noakhali Science and Technology University (NSTU), Noakhali, situated in the South-Eastern part of Bangladesh, from 2019 to 2020. The experimental site fell under Young Meghna Estuarine Floodplain. The site was situated in the tropical climatic zone, with an average annual temperature of 25.6°C and about 2980mm precipitation falls annually. The salt content in the experiment was measured by EC meter (SenslON+EC7) in the laboratory of the Department of Agriculture, Noakhali Science and Technology University. The soil contained EC 0.91 dSm^-1 (deci Siemens per meter). So, the soil was considered non-saline soil. The results were obtained from Soil Resource and Development Institute (SRDI), Noakhali District. BINA Soybean 6 variety was used as a material in the experiment. Seeds of BINA Soybean 6 were collected from the Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh. Moreover, 15 new plastic pots with 20cm depth and 25cm diameter were used to prepare drainage holes in the bottom. Each pot was filled with 4.8 kg dried soil and 1.5kg cow dung. Four different saline concentrations and distilled water were used in the experimental pots as treatments. The 1st saline doses were done before seed sowing and then the 2nd, 3rd, and 4th doses were done at ten days intervals. Triple Super Phosphate (TSP), Muriate of Potash (MOP), and Gypsum fertilizers were mixed with soil before sowing of seed. However, Urea was applied at the middle stage of planting. Six healthy seeds were sown in each pot and covered properly with soil and were kept in epiphytic conditions that provide seeds minimal temperature, water, and oxygen. In each pot, there were three plants allowed to grow after germination of seed. The experiment was laid in Latin Square Design (LSD) with one variety and five (5) treatments and the experiment was replicated three (3) times. The total number of pots used was 15 (5*3). The numbers of germinated seeds were counted daily commencing from 2nd day till 12th day; final count was done and the following formula calculated the germination percentage of each day: Germination Percentage (GP) = No. of germinated seeds/Total no. of seed ×100; The height of plants was measured from the base of the plant to the tip of the longest apex. All the primary and secondary developed branches in each plant were counted before harvesting. At the ripening stage, pods were counted in each plant, while pod length was recorded before harvesting. During enlisting data, three pods per plant and the number of seeds per pod were selected randomly. The highest root length of each plant was measured and recorded after harvesting. The data were subjected to the Analysis of Variance (ANOVA) procedure and P<0.05 was considered statistically significant.

Source of Information: J. Biosci. Agric. Res. 27(02): 2287-2295, 2021

Article Link (Online Journal): https://doi.org/10.18801/jbar.270221.278

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the experiment, it was noticed that the characters (parameters) were gradually diminished with rising levels of saline concentrations. A significant reduction was observed at the higher level of salt concentration compared to the control concentration. All the parameters were decreased gradually with a gradual increase in salinity levels compared to the control concentration level. According to the results, salinity stress had a detrimental effect on BINA Soybean 6 and ultimately reduced yield. Our work confirms that salinity in soil adversely influenced the different parameters of the Soybean plant at all growth stages, whether it is morphological or physiological processes. It can be concluded from the above results that the performance of BINA soybean 6 was better in the control treatment and it is a sensitive plant to different salinity stress levels.

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