ALLELOPATHIC EFFECT OF PLANT SPECIES Aloe vera (L.) Burm. f. ON WEEDS

Cilj rada bio utvrditi alelopatski utjecaj vodenih ekstrakata od svježih listova vrste Aloe vera (L.) Burm. f. na klijavost i rast korovnih vrsta. U pokusu u Petrijevim zdjelicama ispitan je utjecaj vodenih ekstrakata u koncentracijama od 2, 4, 6, 8, 10% na korovne vrste crna pomoćnica (Solanum nigrum L. emend. Miller) i Teofrastov mračnjak (Abutilon theophrasti Medik.). U posudama s tlom ispitan je utjecaj vodenog ekstrakta u koncentraciji od 20% na nicanje i rast strjeličaste grbice (Lepidium draba L.). Samo su najviše koncentracije vodenog ekstrakta snizile klijavost sjemena crne pomoćnice, dok je zabilježen pozitivan utjecaj na duljinu izdanka, te svježu i suhu masu. Vodeni ekstrakti djelovali su pozitivno na duljinu izdanka Teofrastovog mračnjaka. Nicanje strjeličaste grbice sniženo je za 52,7%, dok rast klijanaca nije bio pod utjecajem ekstraktaThe aim of the study was to determine the allelopathic effect of water extracts from fresh leaves of Aloe vera (L.) Burm. f. on the germination and growth of weeds. In Petri dish experiment the effect of water extracts in concentrations of 2, 4, 6, 8, 10% on black nightshade (Solanum nigrum L. emend. Miller) and velvetleaf (Abutilon theophrasti Medik.) was tested. In pots with soil the impact of water extract at a concentration of 20% on the emergence and growth of hoary cress (Lepidium draba L.) was evaluated. Only the highest concentrations of the water extract decreased the seed germination of black nightshade, while positive effect on the shoot length, and fresh and dry seedlings weight was recorded. Water extracts had positive effect on shoot length of velvetleaf seedlings. Emergence of hoary cress was reduced by 52.7%, while the growth of seedlings was not affected by the extract