【摘要】 以5种含氧萜类物质(-)香芹醇、(+)香芹酮、(-)薄荷酮、(-)香芹基乙酸酯和(+)雪松醇为化感物质替代物,以稗草为受体,运用正交旋转回归组合实验,分析物质间的互作效应。各单因子的主效应分析结果表明:(-)香芹醇、(+)香芹酮、(-)薄荷酮和(-)香芹基乙酸酯的主效应曲线均为开口向下的抛物线,而(+)雪松醇为开口向上的抛物线。各单因子的边际效应分析表明:当浓度低于-2水平时各因子对稗草根长的抑制作用大小为(-)薄荷酮>(-)香芹醇>(+)香芹酮>(-)香芹基乙酸酯>(+)雪松醇,当各因子浓度高于+2水平时,则为(+)雪松醇>(+)香芹酮>(-)香芹基乙酸酯>(-)香芹醇>(-)薄荷酮。综合分析显示,当各物质浓度水平分别为(-)香芹醇0.033mmol·L-1、(+)香芹酮0.030mmol·L-1、(-)薄荷酮0.080mmol·L-1、(-)香芹基乙酸酯0.020mmol·L-1和(+)雪松醇0.001mmol·L-1时,方程有最优解,即在理论上其混合物对稗草根长的抑制率达到最大,为93.69%。更多还原

【Abstract】 In this paper, five oxygenic terpenoids — (-)Carveol (C10H16O), (+)Carvone (C10H14O), (-)Menthone (C10H18O), (-)Carvyl acetate (C12H18O2) and (+)Cedrol (C15H26O) were used as test compounds and barnyardgrass(Enchinochloa crusgalli L.) receptor in rotational regression design experiment. The objective was to analyze allelopathic effect of oxygenic terpenoid on barnyardgrass. The results show that the main effects of (-)Carveol, (+)Carvone, (-)Menthone and (-)Carvyl acetate have an down- ward parabolic curve, while (+)Cedrol shows the opposite. Boundary effect of single factor indicates that, when single factor concen- tration falls below -2, the inhibition trend of the oxygenic terpenoids on barnyardgrass root length follows the order of: (-)Menthone >(-)Carveol>(+)Carvone>(-)Carvyl acetate>(+)Cedrol. When the single factor concentration is above +2, the order of inhibition trend of the oxygenic terpenoids is: (+)Cedrol>(+)Carvone>(-)Carvyl acetate>(-)Carveol>(-)Menthone. Furthermore, when the concentrations of (-)Carveol, (+)Carvone, (-)Menthone, (-)Carvyl acetate and (+)Cedrol are respectively 0.033 mmol·L-1, 0.030 mmol·L-1, 0.080 mmol·L-1, 0.020 mmol·L-1 and 0.001 mmol·L-1, inhibition rate could theoretically reach 93.69%.更多还原