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Weed-suppression ability of Oryza longistaminata and Oryza sativa

文献类型： 外文期刊

作者： Zhanq, Fudou 1 ; Li, Tianlin 1 ; Shan, Qinli 1 ; Guo, Yiqing 1 ; Xu, Peng 1 ; Hu, Fengyi 1 ; Tao, Dayun 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Agr Environm Resource Res Inst, Kunming 650205, Peoples R China

关键词： allelopathy;competition;Oryza Longistaminata;weed management

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

ISSN： 0971-4693

年卷期： 2008 年 22 卷 2 期

页码：

收录情况： SCI

摘要： The effects of 5 accessions of Oryza Longistaminata and Oryza sativa [PI 312777, RD 23, O. longistaminata, O. rufipogon and F-1 (O. longistaminataxRD23)] at different leaf stages was investigated on the growth of barnyardgrass [Echinochloa crus-galli (L) Beauv.]. The rice accessions suppressed the weed growth by allelopathic activity more than competition for growth resources. The PI312777, O. longistaminata and F-1 (O. longistaminata xRD23) at 2-leaf stage suppressed 63.6, 62.3 and 61.5% of banyardgrass growth, while their competitive effects were only 5.9, 9.3 and 7.2%, respectively. The competitive ability of rice to weeds increased with age of rice plant. Nevertheless, allelopathy of rice changed with the seedling growth stages. The allelopathic activity of wild rice (O. longistaminata) and its F-1 was stronger at 2 leaf-stages and 6-leaf-stages than other growth phases, but the strongest allelopathic activity of PI312777 was at 2-4 leaf-stage.

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