酚酸类物质的抑草效应分析

Weed-suppressive effect of phenolic acids.

运用正交旋转回归试验设计分析 5种常见的化感物质替代物水杨酸、对羟基苯甲酸、肉桂酸、香草酸和阿魏酸对田间伴生杂草稗草的抑制效应 .结果表明 ,肉桂酸对稗草根长抑制率的影响最显著 ,其关系函数的二次项系数为 - 6 18,达极显著水平 .水杨酸、对羟基苯甲酸和阿魏酸对稗草根长的抑制效应趋势与肉桂酸相同 ,效应曲线均为“∩”形抛物线 ;而香草酸的效应曲线则为“∪”形抛物线 .当水杨酸、对羟基苯甲酸、肉桂酸、香草酸和阿魏酸浓度水平分别为 0 0 6、0 6 0、0 2 4、0 0 2和 0 0 2mmol·L-1时 ,混合物对稗草根长的抑制率最大 ,达到 78 6 5 % .

Allelochemical substitutions salicylic acid,p-hydroxybenzonic acid,cinnamic acid,vanillic acid and ferulic acid were tested in a gyrating regression experiment to study the weed-suppressive effect of phenolic acids on the root growth of barnyardgrass.The results showed that cinnamic acid had a significant inhibitory effect,its square item regression coefficient being -6.18; salicylic acid,p-hydroxybenzonic acid and ferulic acid had the same trend of weed-suppressive potential as cinnamic acid,while vanillic acid had a different weed-suppressive effect from the others.The inhibition rate (IR) on the root growth of barnyardgrass reached its highest level (78.5%) when 0.06 mmol·L -1 salicylic acid,0.60 mmol·L -1 p-hydrobenzonic acid,0.24 mmol·L -1 cinnamic acid,0.02 mmol·L -1 vannillic acid and 0.02 mmol·L -1 ferullic acid were mixed together to apply.