Abstract
Growing herbs and spices using organic methods are supported and encouraged in Egypt. This study was conducted on summer savory (Satureja hortensis L.) throughout the growing seasons of 2019/2020 and 2020/2021. The research was carried out on a plantation that adheres to organic farming practices to ascertain the impact of chitosan and bio-fertilizer EM on the crop. The study was designed with a split-plot as the layout. For the main plots, it was recommended to use rates for chitosan spray that were 0, 5, and 10 liters/hectare. For the subplots, it was recommended to use bio-fertilizer EM, either with or without. Our findings indicated that applying chitosan spray to plants at 10 liters/hectare while using bio-fertilizer produced the highest growth, herbage yield, and improved volatile oil characteristics. The volatile oil constituents were dominated by γ-terpinene and carvacrol. The highest levels of γ-terpinene and carvacrol were found in oils extracted from chitosan and biofertilizer-treated plants. These constituents were lower in control.
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