Abstract

Mentha arvensis, commonly named menthol mint or Japanese mint, is an important volatile oil- bearing plant having high amounts of natural menthol. M. arvensis volatile oil (VO) and menthol have a considerable share in the global trade of medicinal plants for widespread use in the pharmaceutical, food, cosmetic, and fragrance industries. This study was conducted to investigate the response of M. arvensis var. piperascens Holmes to planting time (fall and spring) under marginal land conditions. Plants were propagated by three-year-old rhizomes. Obtained results showed that the effect of growing seasons was not significant on the agronomic traits and VO yield. However, the effects of six different impressions during the experiment were significant on the studied parameters. The highest plant height (45 cm), fresh biomass (16692 kg ha^-1), dry biomass (4736 kg ha^-1), leaf dry yield (2816 kg ha^-1), and VO yield (158 L ha^-1) were observed in the 1^st cuttings. The yield components decreased with the plants aging. The lowest values of the mentioned parameters were in the sixth harvest. Moreover, the VO content varied from 4.6-6.1 %. Menthol (52.19-73.53 %) and menthone (3.42-18.89 %) were identified as the most major VO components of M. arvensis. While the menthol percent decreased in the last cuttings, menthone increased correspondingly. Based on the results of this study, it can be suggested that the cultivation of mint in marginal land has a desirable agronomic yield and acceptable chemical properties.

摘要

薄荷脑，通常被称为薄荷薄荷或日本薄荷，是一种重要的挥发性含油植物，具有大量的天然薄荷醇。M. arvensis挥发油（VO）和薄荷醇在药用植物的全球贸易中占有相当大的份额，广泛用于制药，食品，化妆品和香料行业。进行这项研究以调查欧文氏杆菌的反应变种 Piperascens Holmes在边缘土地条件下的播种时间（秋季和春季）。植物是由3岁的根茎繁殖的。结果表明，生长季节对农艺性状和VO产量影响不大。但是，在实验过程中六种不同的印象对所研究的参数具有显着影响。最高株高（45 cm），新鲜生物量（16692 kg ha ^-1），干燥生物量（4736 kg ha ^-1），叶干产量（2816 kg ha ^-1）和VO产量（158 L ha ^-1）在1中观察到^第一s插。产量成分随植物衰老而降低。提到的参数的最低值是在第六次收获。此外，VO含量为4.6-6.1％。薄荷醇（52.19-73.53％）和薄荷酮（3.42-18.89％）被确定为最重要VO成分M.荬。在最后一次插穗中薄荷醇百分比降低，而薄荷酮相应增加。根据这项研究的结果，可以认为在边缘土地上种植薄荷具有理想的农艺产量和可接受的化学特性。