Abstract The effect of drying processing was investigated in wild marigold (Tagetes minuta L.) in the western Himalayas. Experiment on three drying methods (shade, sun, and oven) and seven post-harvest drying time (0, 12, 24, 36, 48, 60, and 72 h) were studied under a completely randomized design. The essential oil (EO) was obtained by hydrodistillation and was analyzed by GC and GC/MS. The moisture content of tagetes herbage was lower, while essential oil yield (g/kg dry matter) was significantly higher in sun drying for 72 h. The total area percentages of identified compounds of T. minuta essential oil were 90.5 to 94.5 % for drying method and 85.9-96.7 % for drying time. Drying methods and drying time had no significant impact on the number of EO components, as 9 chemical constituents were identified in every drying treatment. The major components were (Z)-ocimene, dihydrotagetone, (E) & (Z)-tagetone, and (E) & (Z)-tagetenone. The EO amount and the area percentage of its two main components (Z)-ocimene and dihydrotagetone were significantly influenced by the different drying methods and time. Higher proportions of (Z)-ocimene and lower proportion of dihydrotagetone in the EO of sun-dried tagetes herbage for 60 h were more pronounced. Further increase in drying time caused a greater loss in the percentage of (Z)-ocimene.

中文翻译：

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干燥处理对喜马拉雅西部野生万寿菊精油产量及成分的影响

摘要 研究了喜马拉雅西部野生万寿菊（Tagetes minuta L.）干燥处理的效果。在完全随机设计下研究了三种干燥方法（阴凉、阳光和烤箱）和七种收获后干燥时间（0、12、24、36、48、60 和 72 小时）的试验。精油 (EO) 通过水蒸馏获得，并通过 GC 和 GC/MS 进行分析。万寿菊的水分含量较低，而晒干72小时的精油产量（g/kg干物质）显着较高。干法鉴定出的海棠精油化合物的总面积百分比为90.5-94.5%，干燥时间为85.9-96.7%。干燥方法和干燥时间对 EO 组分的数量没有显着影响，因为在每次干燥处理中都确定了 9 种化学成分。主要成分是(Z)-罗勒烯、二氢他酮、(E)&(Z)-tagetone和(E)&(Z)-tagetenone。不同干燥方法和时间对EO用量及其两种主要成分(Z)-罗勒烯和二氢他酮的面积百分比有显着影响。在 60 小时的晒干万寿菊的 EO 中，较高比例的 (Z)-罗勒烯和较低比例的二氢万寿菊酯更为明显。干燥时间的进一步增加导致（Z）-罗勒烯百分比的更大损失。在 60 小时的晒干万寿菊的 EO 中，较高比例的 (Z)-罗勒烯和较低比例的二氢万寿菊酯更为明显。干燥时间的进一步增加导致（Z）-罗勒烯百分比的更大损失。在 60 小时的晒干万寿菊的 EO 中，较高比例的 (Z)-罗勒烯和较低比例的二氢万寿菊酯更为明显。干燥时间的进一步增加导致（Z）-罗勒烯百分比的更大损失。