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Asian Journal of Crop Science

Year: 2017 | Volume: 9 | Issue: 2 | Page No.: 35-39
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Authors

Adel Badr El-Nasharty

Sona Salem El-Nwehy

Abd El-Halim Ibrahim Rezk

Omar Maghawry Ibrahim

Omar Maghawry Ibrahim

Keywords

Background and Objectives: Salinity adversely affects plant growth via many ways like low water potential of soil solution, imbalance of nutritional status and ions toxicity, so, alleviating the adverse effect of salinity has become a main concern of many researchers. The aim of the present study was to produce sunflower grown in a calcareous soil under saline stress conditions. Methodology: Two field experiments in a Randomized Complete Block Design (RCBD) were conducted in two summer seasons of 2015 and 2016 in a private farm, Oraby Village, Mariut sector, Alexandria, Egypt to study the effect of foliar spraying with micronutrients alone and combined with potassium humate, cytokinin and algae extract on growth, seed and oil yield and nutrients content of sunflower plants grown in calcareous soil under saline stress conditions. Results were statistically analyzed and then by using SAS software version 9.3. Results: A combined analysis was conducted and the results revealed that foliar spraying with micronutrients either alone or combined with potassium humate, cytokinin or algae extract resulted in a significant increase in growth parameters (plant height, stem diameter, number of leaves, chlorophyll index, weight of 100 seeds and head diameter). Increases ranged from 11-111% compared with control and the highest ones was for the stem diameter. Also, a significant increase was observed due to the application of the treatments in seed yield, oil percentage and oil yield and the percent increases were ranged from 9% for oil percentage and 61% for oil yield comparing with control. Moreover, the nutrients content of sunflower plants (N, K, Ca, Mg, Na and Fe, Mn and Zn) was significantly increased due to all treatments of the foliar sprays. The combined treatment of algae extract and micronutrients was the best treatment where it recorded the highest values of all the studied parameters. In which 1630 kg seed per fed was achieved with percent increase of 36% and also 437 kg oil per fed with percent increase of 61% comparing with control. Conclusion: It could be concluded that foliar spraying with both algae extract and micronutrients may help sunflower plants to cope with salinity and produce an improved seed and oil yield under salinity stress conditions in calcareous soil.
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