Influence of Foliar Spraying with Phyco-synthesized Scenedesmus obliquus-Zn/Fe Nanoparticles and Spirulina platensis Extract on Growth, Leaf Mineral Content and Soil Microbial Activity of Nemaguard Peach Seedlings

Abourayya, Mahmoud Sami; Kaseem, Nabila Elbadawy; Mahmoud, Thanaa Shaban Mohamed; Eisa, Ramadan Ahmed; Matter, Ibrahim; Darwesh, Osama; Rakha, Amal Masoad

doi:10.21608/ejchem.2024.311951.10188

Influence of Foliar Spraying with Phyco-synthesized Scenedesmus obliquus-Zn/Fe Nanoparticles and Spirulina platensis Extract on Growth, Leaf Mineral Content and Soil Microbial Activity of Nemaguard Peach Seedlings

Document Type : Original Article

Authors

¹ horticultural crops technology NRC, Giza Egypt

² Horticulture crops Technology Department, Agricultural and Biological Division, National Research Centre

³ Horticulture crops Technology Department, Agricultural and Biological Institute, National Research Centre

⁴ Department of Horticultural Crops Technology, National Research Centre, Dokki, Giza, Egypt

⁵ Agricultural Microbiology Department, National Research Centre, Cairo, Egypt

⁶ Agricultural Microbiology Dept., National Research Centre, Egypt

⁷ Department of Horticultural Crops Technology, Agricultural and Biological Research Institute, National Research Center

10.21608/ejchem.2024.311951.10188

Abstract

A nursery experiment was conducted during the period from 2-7-2022 to 14-9-2023, aiming to evaluate the effects of foliar application of Spirulina extract (SE) at two concentrations (5 and 10 mL/L) and nano-micronutrients of iron (NFe) and zinc (NZn) at two concentrations (2 and 4 mL/L) and their interactions on growth and nutritional status of Nemaguard peach, comparing with untreated control (spray with distilled water only). Results showed that the binary interaction between Spirulina fertilization and nano-microelements, the combination SE1 + (NF2+NZ2) treatment, gave the highest significant increase in seedling height and diameter, total chlorophyll leaf content, fresh and dry weight of leaves, potassium, magnesium, and zinc. Meanwhile, the combination SE2 + (NF2+NZ2) treatment significantly increased the number of branches and leaves/seedlings and leaf area, as well as the leaf content of total carbohydrates, nitrogen, phosphorus, and iron. Nano-Fe/Zn and Spirulina extract also increased the activity of microbes in the rhizosphere of seedlings compared to the control treatment. It could be concluded that applying Spirulina extract and nano-micronutrients (iron and zinc) to Nemaguard rootstock seedlings is an effective way to improve vegetative growth and leaf mineral content, promote seedling growth, and shorten the time needed to reach the appropriate size to be grafted onto.

Keywords