In order to evaluate the effect of reduced doses of trifluralin in integration with non-chemical management treatments on weeds, essential oil yield and composition of dill (Anethum graveolens L.), a 2-year study was conducted in East Azarbaijan, Iran in 2020–2021. The study was conducted as factorial experiment based on randomized complete block design with four replications. The first factor was trifluralin use at four levels (non-use, 480, 720 and 960 g ai ha⁻¹) and the second factor was non-chemical weed management treatments consisted of using the living mulch of fenugreek (Trigonella foenum-graecum L.) (FLM) and bitter vetch (Vicia ervilia (L.) Willd. (VLM), wheat straw mulch (WSM), one time hand weeding (OHW) and without non-chemical management (control). The results indicated that at all trifluralin doses the weed biomasses in OHW and WSM treatments were lower than those in FLM and VLM. The relative ranking of non-chemical weed management treatments for weed biomass reduction and essential oil yield of A. graveolens L.was OHW > WSM > FLM and VLM. The results of GC–MS analysis indicated that the main chemical constituents of essential oil (carvone, limonene and dill apiole) were influenced differently by trifluralin use and non-chemical weed management treatment. We can conclude that recommended dose of trifluralin could be replaced with reduced doses of trifluralin in integration with non-chemical treatments in order to improve the weed control efficacy and essential oil yield of A. graveolens L. in a sustainable production system.

为了评估减少剂量的氟乐灵与非化学管理处理相结合对杂草、精油产量和莳萝 ( Anethum graveolens L.) 成分的影响，2020 年在伊朗东阿塞拜疆进行了一项为期 2 年的研究–2021。该研究是作为基于随机完整区组设计的析因实验进行的，重复四次。第一个因素是氟乐灵在四个水平上的使用（未使用、480、720 和 960 g ai ha ^-1），第二个因素是非化学杂草管理处理，包括使用胡芦巴的活覆盖物（Trigonella foenum-graecum L .) (FLM) 和苦紫云英 ( Vicia ervilia(L.) 威尔德。(VLM)、小麦秸秆覆盖 (WSM)、一次性人工除草 (OHW) 和无非化学管理（控制）。结果表明，在所有氟乐灵剂量下，OHW 和 WSM 处理的杂草生物量均低于 FLM 和 VLM。非化学杂草管理处理对A. graveolens杂草生物量减少和精油产量的相对排名L.was OHW > WSM > FLM 和 VLM。GC-MS 分析结果表明，精油的主要化学成分（香芹酮、柠檬烯和莳萝芹籽）受氟乐灵使用和非化学杂草管理处理的影响不同。我们可以得出结论，推荐剂量的氟乐灵可以用减少剂量的氟乐灵与非化学处理相结合，以提高可持续生产系统中 A. graveolens L. 的杂草控制效果和精油产量。