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Effect of Nacl Pre-treatment on Adaptation of Cauliflower to Salinity Stress (2017 – 2018)

H. E. M. Khairul Mazed
Horticulture Research Centre, BARI, Joydebpur, Gazipur-1701

Tuhina Hasan
Horticulture Research Centre, BARI, Joydebpur, Gazipur-1701

M.D. Hossain
Horticulture Research Centre, BARI, Joydebpur, Gazipur-1701

Ferdouse Islam
Horticulture Research Centre, BARI, Joydebpur, Gazipur-1701

Abstract/ Executive Summary:

A pot experiment was conducted at the Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during the Rabi season of 2017-18 to investigate the effect of NaCl pre-treatment in cauliflower when exposed to different salt treatments. Two cauliflower varieties; BARI Fulkopi-1 (BF1) and White Mountain Hybrid (WMH) were included in this study. Seeds were primed with 0, 100 and 200 mM NaCl solutions for 45 h. Seeds were sown for germination, treated with saline water (0, 2, 4, 6 dS/m) and continue upto transplanting. After transplanting into 15-L pots containing soil and recommended doses of manures and fertilizers, plants were subjected to 0, 4, 8 and 12 dS/m salinity and maintained up to 30 days. The results revealed that percentage of seed germination were inhibited by higher soil salinity. Primed with 100 and 200 mM NaCl gave somewhat higher seed germination (%) under control and stress condition for both of BF1 and WMH. Although, soil salinity reduced length of shoot and in some cases increased length of root, seed priming had no significant effect on shoot as well as on root length. Similarly, in most cases, fresh and dry weight of shoot decreased and fresh and dry weight of root increased with increasing salinity. The numbers of leaves/plant, individual leaf weight, total plant weight and curd weight were restricted by soil salinity. However seed priming had very little effect on those aspects.

Keywords: Adaptation, Cauliflower, Salinity stress, Soil salinity, Manures, Fertilizers.

Location: Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Crop-Soil-Water Management

Commodity: Cauliflower, Soil salinity

Objectives:

To search out suitable method of seed priming for higher yield and to bring the uncultivable land of the highly saline affected areas under cultivation.

Methodology:

The experiment was conducted at the Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during the months of November 2017 to February 2018 following completely randomized design with three replications. Seeds of two cauliflower varieties; BARI Fulkopi-1 (BF1) and White Mountain Hybrid (WMH) were thoroughly washed with dH₂O and then kept in 0, 100 and 200 mM NaCl solutions for 45 h at 25°C in the dark. After priming, the seeds were washed again with dH₂O placed in plastic bowls (3/treatment, 100 seeds/bowl) full of sandy soil with cowdung (50:50), then moistened with saline water (0, 2, 4, 6 dS/m) for germination. The bowls were kept under normal sunlight and irrigated with same concentration of saline water as per requirement till transplanting. After 30 days of sowing, 3 homogeneous seedlings from each treatment was transplanted into 15-L pots (3/treatment, 1 seedling/pot) containing soil and recommended doses of manures and fertilizers. At the beginning, the pots were irrigated with fresh water but after 5 days, with 4 dS/m saline water (except for control treatment) and every 3^rd days the concentration of saline soil were increased by 4 dS/m for getting the final concentrations of 0, 4, 8 and 12 ds/m and maintained up to 30 days. Control plants were irrigated with fresh water only. Manures and fertilizers were used as recommended by Bangladesh Agricultural Research Institute. Data were collected on germination, different seedlings attributes, total plant weight, leaves/plant and individual leaf weight at harvest and curd weight etc. Collected data were statistically analyzed using XLSTAT 2015 software.

Source of Information: Annual Research Report 2017 – 2018, Horticulture Research Centre, BARI, Joydebpur, Gazipur Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the above results, it is revealed that higher salinity caused severe adverse impact in cauliflower production. Seed primed with 100 and 200 mM NaCl rather had no significant effect on growth of cauliflower plant, but caused negative impact on curd yield. Although, seed priming is a successful method that has been proved to improve the growth and yield of many crops, the practice might not be effective for cauliflower.

Knowledge Management: Report/Proceedings