The current experiment was established to assess the response of Peppermint (Mentha piperita L.) growth, herb yield and volatile oil production to organic manure (humic acid), some amino acids, and their interactions. This experiment was done during From February to October 2025 at a private farm in Misurata, Libya. The tallest plants and more branch number were achieved when Peppermint plants treated with 24 ml/L of Organic nutrient as soil drench and 15 ml/L of amino acids as foliar application compared to the other treatments under study. Likewise, increasing organic nutrient or amino acids rates gradually increased fresh and dry herb yield per plant. The highest volatile oil yield per plant and per hectare was obtained with the combination treatment of 24 ml/L(HU4) of organic nutrient and 15 ml/l (AM4) of amino acids compared to the other combination treatments. According to volatile oil compounds, HU4+AM4 combination treatment recorded the highest values of Limonene, Menthone, Mentofuran, iso-Menthone, neo-Menthol, Menthol, Pulegone and 1,8-cineole. Also, the highest values of iso-Menthol and ρ-cymene acetate were obtained with HU2+AM1 treatment. Compared to the other combinations under study. In general, it could recommend that this treatment, produce a uniform response of Peppermint growth and herb yield and enhancing volatile oil production under sandy soil conditions
Effect of organic manure and some amino acids on productivity of Peppermint (Mentha piperita L.) plants
Amina. A. Zorab
( Biology Dep.t,/ Botany, Fac. of Science, Misurata,Univ., Libya )
Salem. M. Ghwaji
( Plant production Dept, Fac. of Agric, Misurata, Univ., Libya )
Abobaker E. Alsanose
( Plant production Dept, Fac. of Agric, Sirte, Univ., Libya )
Essam A. Hassan
( Horticulture Dept., Fac. Agric., Al-Azhar University, Assiut, Egypt )