El-Zehery, T., Badawy, A., El-Shabasy, S. (2025). Effete of Nitrogen Forms and Zinc Levels on Yield, Quality of Onion (Allium cepa L.) and Soil Fertility. Journal of Soil Sciences and Agricultural Engineering, 16(7), 197-208. doi: 10.21608/jssae.2025.390899.1293
T. M. El-Zehery; Asmaa F. M. Badawy; Sara A. El-Shabasy. "Effete of Nitrogen Forms and Zinc Levels on Yield, Quality of Onion (Allium cepa L.) and Soil Fertility". Journal of Soil Sciences and Agricultural Engineering, 16, 7, 2025, 197-208. doi: 10.21608/jssae.2025.390899.1293
El-Zehery, T., Badawy, A., El-Shabasy, S. (2025). 'Effete of Nitrogen Forms and Zinc Levels on Yield, Quality of Onion (Allium cepa L.) and Soil Fertility', Journal of Soil Sciences and Agricultural Engineering, 16(7), pp. 197-208. doi: 10.21608/jssae.2025.390899.1293
El-Zehery, T., Badawy, A., El-Shabasy, S. Effete of Nitrogen Forms and Zinc Levels on Yield, Quality of Onion (Allium cepa L.) and Soil Fertility. Journal of Soil Sciences and Agricultural Engineering, 2025; 16(7): 197-208. doi: 10.21608/jssae.2025.390899.1293
Effete of Nitrogen Forms and Zinc Levels on Yield, Quality of Onion (Allium cepa L.) and Soil Fertility
1Soil Department, Faculty of Agriculture, Mansoura University, EL-Mansoura, 35516, Egypt
2Soil Improvement and Conservation Research Department, Soils, Water and Environment Research Institute (SWERI), Agricultural Research Center (ARC), Giza, Egypt
3Soil Chemistry and Physics Research Department, Soil, Water and Environment Research Institute of Agriculture Research Center, Giza,12619, Egypt.
Abstract
Nitrogen (N) is an essential nutrient, which often limits crop production. Due to their sparse and shallow root system, the N fertilizer use efficiency in onion production is often low and the risk of nitrate leaching losses is high. Micronutrients play a crucial role in enabling crops and vegetables to achieve optimum productivity, improve storage quality, and overcome physiological disorders. A field experiment was conducted to determine the effect of foliar application of micronutrients on growth and yield of onion (Allium cepa L.) cv. Giza 20 during season of 2022/ 2023. The main factor was the forms of nitrogen fertilizer N1: Urea (NH2)2CO, N2 (NH4)2SO4 and N3 Ca(NO3)2 .The sub main factor treatments consisted of two levels of foliar application of ZnSO4 (1% and 1.5%) that laid out in spilt plot design with three replications. Data on growth, yield, bulb quality and storage life parameters were recorded and analyzed using co-stat. Optimizing N and zn fertilization strategies, particularly through the combined application of urea and 1.5% ZnSO4, can significantly enhance fresh weight (14176.17 and 14200.67 kg/fed) for both season respectively and overall plant productivity. Also urea and foliar application of 1% ZnSO4gave the most effective content of zn (44.5 and 46 ppm) respectively.. The 1% Zn treatment is recommended for maximizing zinc uptake and overall plant health.. The application of zinc, particularly at a rate of 1.5% with calcium nitrate, was proved to enhance soil nitrogen availability(54.22 and 54.77 mg/kg) respectively, potentially improved crop growth and yield.
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