Evaluation of humic acid and iron and zinc nanochelates effect on Italian basil (Ocimum basilicum L.) in salinity stress condition

Document Type : Original Article

Authors

1 Department of Horticulture science, Karaj branch, Islamic Azad University, Karaj, Iran.

2 Department of Agronomy and plant breeding, Karaj branch, Islamic Azad University, Karaj, Iran.

Abstract

The salinity tolerance of basil is considered low and application of humic acid and micronutrient elements are the environmentally friendly way to alleviate the negative effects of salinity stress. For this purpose, a factorial experiment was conducted base on a completely randomized design in three replications on the Italian basil (Ocimum basilicum L.) in a greenhouse located in Karaj, Iran, in April 2022. The factors of this research included humic acid in three concentrations (0 (control), 500 and 1000 mg l-1), application of micronutrient elements in three levels (0 (control), iron nanochelate, zinc nanochelate) and salinity stress in two levels (without stress (normal condition), and 30 mM NaCl). The results showed that salinity stress decreased the yield and essential oil of Italian basil. Increasing the concentration of humic acid as well as the use of micronutrients increased the quality and qualitative yield of this plant. The highest dry matter yield (151.12 g m-2) was seen in interaction of humic acid 1000 mg l-1 +iron nanochelate in normal condition and also (149.74 g m-2) was observed in humic acid 1000 mg l-1+ zinc nanochelate in normal condition. The highest essential oil (1.89%) was seen in interaction of humic acid 1000 mg l-1 + iron nanochelate, in normal condition. Therefore, humic acid and micronutrients (iron and zinc nanochelate) reduced the negative effect of salinity stress and improves Italian basil tolerance with stress condition and these are good environmentally friendly way to deal with saline conditions.

Keywords

References

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