水稻化感作用潜力研究初报

Preliminary studies on allelopathic potential in rice

摘要: 6个化感水稻的化感作用潜力试验结果表明，不同品种水稻的化感潜力存在差异，6个供试水稻按其对稗草生长抑制率的大小依次为“Woo Co Chin Yu”＞“Kouketsumuchi”＞“AC1423”＞“CN-15”＞“Taichung Native 1”＞“YH-1”。提高化感物质的浓度，可相应增强对稗草生长的抑制作用。试验证实，水稻对稗草的化感作用具有密度依赖效应，表现为杂草密度加大，水稻化感抑制效果降低，这与资源竞争的结果恰好相反。

Abstract: Experiments of allelopathic potential in six lines of rice indicated that the order inhibiting the barnyardgrass growth was “Woo Co Chin Yu”>“Kouketsumuchi”>“AC1423”>“CN-15”>“Taichung Native 1”>“YH-1”.Increasing the extract concentrations might cause higher inhibitory effect on the barnyardgrass. It also indicated that the phytotoxicity was density-dependent,showing that the inhibitory effect decreased with the increases of the weed density.Such a result was contrary to the effect of resource competition.