Effects of Cultivation Systems and Environmental Conditions on Peppermint (Mentha × piperita L.) Biomass Yield and Oil Content
AbstractPeppermint (Mentha × piperita L.) is perennial plant cultivated for essential oil production. In the present study, field experiments were conducted to determine the performance of peppermint under different cultivation systems for two consecutive growing periods in 2015 and 2016. The effects of environmental conditions on peppermint biomass yield and oil content was also evaluated. The experiments were carried out according to randomized complete block design with five replications per cultivation system. The results of the present study indicate that the total aboveground dry weight and dry leaves biomass were affected by cultivation system and year. For both growing seasons, the highest values were found under the conventional farming system. In contrast, oil content was approximately 14% higher in organic system than in conventional system. Moreover, oil content differed by year, with higher values being observed in 2015 comparing to 2016. Both oil content and biomass yield were positively affected by high temperatures. The results from this study demonstrated that both environmental conditions and the cultivation systems affect the biomass and oil content in peppermint crop.
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