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Research Article
Inhibition of Germination and Seedling Growth of Wild Oat by Rice Hull Extracts

M. Kolahi, B. Peivastegan, I. Hadizadeh and S.M. Seyyednejad

Journal of Applied Sciences, 2009, 9(15), 2857-2860.


In this study, phytotoxicity of rice hull extracts (Oryza sativa L.) on wild oat (Avena ludoviciana Durieu) was investigated. Hull extracts from 13 cultivated rice cultivars (Oryza sativa L.) were used to determine their allelopathic potential on seed germination and seedling growth of wild oat (Avena ludoviciana Durieu). The allelopathic effects of water hull extracts from selected cultivars were investigated. In the screening the Red anbarbo extract inhibited germination 24% very closely fallowed Daniyal is 27%. Seedling growth bioassays demonstrated that the wild-oat (Avena ludoviciana Durieu) responded differently to the allelopathic potential of rice. For wild-oat (Avena ludoviciana Durieu) shoot length and germination were more depressed than root length. Some hulls extracts including Champa, Sahel almost didn’t affect root length. The greatest total seedling length inhibition was from the Daniyal extracts. Extract of rice hulls significantly reduced roots length of wild oat. Extracts of Daniyal reduced root length of wild oat by 2.19 cm. This cultivar have the highest inhibitory on root length of wild oat. These results suggest that rice hull extracts may be a source of natural herbicide. There may be genetic differences among rice cultivars for allelopathic potential on Wild-oat. The breeding of rice cultivars with greater allelopathic potential may be possible.

ASCI-ID: 35-2914

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