Abstract

Organic fertilizers might have prominent effects on lavender (Lavandula angustifolia Mill.) plant growth and secondary metabolites composition. A field study was conducted to assess the responses of biomass yield, nutrients, and essential oil components of lavender to different organic fertilizers. The effect of fertilizer treatments included changing the amounts of cow manure (0–40 tonne/ha) and vermicompost (0–15 tonne/ha). The fertilizers enhanced the total area and dry matter of the leaves by 40% with cow manure and 62% with compost compared to no fertilization. The essential oil yield increased by 70% after treatment with cow manure. The highest change in the essential oil composition was marked in the oxygenate monoterpenes such as 1,8-cineole, followed by borneol, and camphor. The highest percentage of 1,8-cineole was achieved with a mix of both organic fertilizers. In addition, this combination was able to increase the leaf N concentration by 43% above the unfertilized treatment. These results showed that the use of combined fertilizers enhanced the leaf dry matter and improved the plant nutrient value and essential oil constituents.

摘要

有机肥料可能对薰衣草（Lavandula angustifoliaMill.) 植物生长和次生代谢物组成。进行了一项实地研究，以评估薰衣草的生物质产量、养分和精油成分对不同有机肥料的反应。肥料处理的影响包括改变牛粪（0-40 吨/公顷）和蚯蚓粪（0-15 吨/公顷）的量。与不施肥相比，肥料使牛粪的总面积和干物质增加了 40%，堆肥增加了 62%。用牛粪处理后，精油产量提高了70%。精油成分变化最大的是含氧单萜，如 1,8-桉树脑，其​​次是冰片和樟脑。两种有机肥料混合使用时 1,8-桉树脑的比例最高。此外，这种组合能够使叶片 N 浓度比未施肥处理增加 43%。这些结果表明，复合肥的使用增加了叶片干物质，提高了植物营养价值和精油成分。