Hayam A. El –Shaboury and Hanaa M. Sakara( 2021). The Role of Garlic and Onion Extracts in Growth and Productivity of Onion under Soil Application of Potassium Humate and FulvateEgypt. J. Soil. Sci. Vol. 61, No. 2, pp. 171-184 (2021)
Abstract: DURING winter seasons of 2017-2018 and 2018-2019, an experiment was conducted at a private farm located in El-Sarou, Damietta governorate, Egypt, to test the role of garlic and onion extract in foliar way on onion growth, yield, and quality as under soil addition of potassium humate and fulvate. In split plot design, the experimental was consisted of 3 replicate having 15 treatments arrangement as; 5 treatments of potassium humate and fulvate (control, 2 and 4 kg fed-1 for each form) as main plot, 3 levels of plant extract (without, 10 and 20 ml L-1 mix from garlic and onion extract) as sub plot. The obtained results indicated that, soil addition of 4 kg fed-1 potassium humate recorded the highest significant values for growth traits, yield and its components as well as N, P, K, Fe, Mn and Zn in leaves and bulb, also, recorded the highest significant in chemical and physical quality of bulb. Based, on the same parameters, increased with foliar application at the rate of 20 ml L-1 from plant extract. The combined application between 4 kg fed-1 potassium humate and foliar 20 ml L-1 plant extract was more prominent in enhancing the aforementioned traits. Addition of potassium humate 4 kg fed-1 increased available N, P, K mg.kg-1 and porosity, while decreased EC ds.m-1 in the soil after harvesting.
Keywords: (Potassium humate, Fulvate, Garlic ; onion plant extract ; Onion plant .)
