Allelopathic effect of plant species Aloe vera (L.) Burm. f. on germination and initial growth lamb's lettuce and carrot

Cilj istraživanja bio je utvrditi utjecaj vodenih ekstrakata pripremljenih od svježe mase listova vrste Aloe vera (L.) Burm. f. na klijavost i početni rast matovilca i mrkve. U Petrijevim zdjelicama ispitivani su vodeni ekstrakti u koncentracijama od 2%, 4%, 6%, 8% i 10%. Na klijavost sjemena matovilca i mrkve stimulativno su djelovale više koncentracije vodenog ekstrakta te je povećana do 16,2% odnosno 19% u odnosu na kontrolni tretman. Više koncentracije ekstrakata pokazale su inhibitorni utjecaj na rast klijanaca matovilca, dok su niže koncentracije djelovale stimulativno. S druge strane, ekstrakti su djelovali pozitivno na rast i razvoj klijanaca mrkve te stimulirali duljinu korijena i izdanka te svježu i suhu masu klijanaca. U prosjeku, veći alelopatski utjecaj zabilježen je na klijancima mrkve nego na klijancima matovilca.The aim of this research was to determine allelopathic effect of water extracts prepared from fresh leaves of Aloe vera (L.) Burm. f. on germination and growth of lamb's lettuce and carrot. The water extracts in concentrations of 2%, 4%, 6%, 8% and 10% were evaluated in experiments conducted in Petri dishes. High concentrations of water extract positively affected lamb's lettuce and carrot, increasing the germination up to 16.2% and 19%, respectively, relative to the control treatment. Higher concentrations of water extract negatively affected the seedling growth of lamb's lettuce, while lower concentrations showed positive effect. On the other hand, the water extracts positively affected the seedling growth and evolvement of carrot, stimulating the root and shoot length, fresh and dry weight of seedlings. In average, higher allelopathic effect was observed on seedlings of carrot than lamb's lettuce