تاثیر تداخل علف هرز سلمه تره (Chenopodium album) بر عملکرد بذر و اسانس رازیانه (Foeniculum vulgare)

In order to evaluate the interfering effect of lambsquarters (Chenopodium album) on seed and essential oil yield of fennel (Foeniculum vulgare), a factorial experiment was conducted in Islamic Azad University, Tabriz Branch, Iran, during 2011-2012. Factors included five weed densities (0, 2, 4, 6 and 8 plants per meter row) and its relative emergence times of simultaneously sown, 10, 20 and 30 days after fennel emergence based on randomized complete blocks design with three replications. Results indicated that fennel seed and essential oil yields were increased with decreasing weed density and delay in its emergence time. In this study, treatments with higher biomass production of lambsquarters, resulted in greater weed seed production and lower seed yield in fennel, being important for lambsquarters management in fennel fields.