Effect of different fertilizers on peppermint - Essential and non-essential nutrients, essential oils and yield
Tepecik, Mahmut | Esetlili, Bihter Çolak | Öztürk, Bintuğ | Anac̦, D.
Peppermint (Mentha x piperita L.) plant was grown in this study using different mineral fertilizers combinations. Effects of fertilizer treatments on green and drug herb yields, herb essential nutrients (N, P, K, Ca, Na, Mg, Fe, Zn, Mn, Cu), essential oil yield, essential oil components (menthol, menthone, 1,8 cineole and menthofuran) and non-essential elements (heavy metal) (Pb, Ni, Co, Cr and Cd) were determined in two successive years (2011-2012). The highest green and drug herb yields were obtained from mono ammonium phosphate (MAP) treatments (24,980 kg ha–1 and 3070 kg ha–1) in the first year and from 15:15:15 treatments (16,950 kg ha–1 and 3080 kg ha–1) in the second year. Nutrient elements nitrogen 2.70% in MAP application, phosphorus 0.55% in mono potassium phosphate (MKP) application, potassium 3.12% in MAP application, calcium 1.47% in di ammonium phosphate (DAP) application, magnesium 0.36% in 15:15:15 application, iron 106 mg kg–1 in 15:15:15 application, copper 11.83 mg kg–1 in MAP application, zinc 35 mg kg–1 in MKP application and manganese 89 mg kg–1 in MAP application the highest value were respectively obtained from treatments. Concentrations of non-essential elements (Pb, Ni, Cr and Cd) in herb were found to be below toxic values. In both years, the highest essential oil yields were obtained from MAP treatments (4.10% in the first year and 2.90% in the second year). The essential oil components of peppermint were menthol, menthone, 1,8 cineole and menthofuran and menthol was the major component in both years.
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