Weed-suppressive effect of phenolic acids

Abstract

Abstract: 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稬^-1 salicylic acid,0.60 mmol稬^-1 p-hydrobenzonic acid,0.24 mmol稬^-1 cinnamic acid,0.02 mmol稬^-1 vannillic acid and 0.02 mmol稬^-1 ferullic acid were mixed together to apply.

Key words: Allelochemical, Phenolic acids, Weed-suppressive effect, Orthogonally gyral regression design

CLC Number:

Q946

HE Huaqin, LIANG Yiyuan, JIA Xiaoli, SONG Biqing, GUO Yuchun, LIANG Kangjing, LIN Wenxiong. Weed-suppressive effect of phenolic acids[J]. Chinese Journal of Applied Ecology, 2004, (12): 2342-2346.

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