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Preliminary studies on the allelopathic potential of wild Rice (Oryza) germplasm

文献类型: 外文期刊

作者: Guo, YQ 1 ; Zhang, FD 2 ; Tao, DY 2 ; Yu, LQ 2 ; David, G 3 ;

作者机构: 1.China Natl Rice Res Inst, Hangzhou 310006, Peoples R China

2.China Natl Rice Res Inst, Hangzhou 310006, Peoples R China; Ctr Agr Divers Res & Training, Kunming 650201, Peoples R China; Yunnan Acad Agr Sci, Kunming 650205, Peoples R China; USDA ARS, Dale Bumpers Natl Rice Res Ctr, Stuttgart, AR 72160 USA

3.China Natl Rice Res Inst, Hangzhou 310006, Peoples R China; Ctr Agr Divers Res & Training, Kunming 650201, Peoples R China; Yunnan Acad Agr Sci, Kunming 650205, Peoples R China; USDA ARS, Dale Bumpers Natl Rice Res Ctr, Stuttgart

关键词: Allelopathy;competition;Echinochloa crus-galli;Oryza barthii;O. longistaminata;O nivara;O rufipogon

期刊名称:ALLELOPATHY JOURNAL ( 影响因子:0.962; 五年影响因子:0.99 )

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收录情况: SCI

摘要: Allelopathic potential in wild rice species against barnyardgrass (Echinochloa crus-galli L , Beauv) was evaluated in bioassay and pot experiments in greenhouse and laboratory Two wild rice accessions of S46 (Oryza barthii) and S72 (O. rufipogon) significantly reduced the plant height and dry weight of barnyardgrass While, a wild rice accession of S37 (O longistaminata) reduced the barnyardgrass germination rate significantly. The inhibitory effects of wild rice on the weed was greater during the rice elongation stage than at the reviving stage. Accessions S68 and S72 increasingly inhibited the plant height and dry weight of bamyardgrass as the distance between rice and weed plants decreased. Raw extracts flom S37 were more inhibitory to the emergence rate, root length and seedling height of barnyardgrass than other accessions of wild rice.

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