酚酸类物质积累对东北山樱根系土壤酶活性的影响

Effects of Phenolic Acids Accumulation on Soil Enzymes Activities in the Root System for Cerasus sachalinensis

采用外源施入的方式,研究酚酸类物质对土壤酶活性的影响,旨在为揭示酚酸类物质的化感作用机理提供科学参考。结果显示:浓度为0.1~1 mmol·L^(-1)的对羟基苯甲酸、香豆素及其混合酚酸类物质对土壤中多酚氧化酶、过氧化氢酶、蔗糖酶和脲酶的活性具有不同程度的促进作用;浓度为10 mmol·L^(-1)的对羟基苯甲酸、香豆素及其混合酚酸类物质对土壤中多酚氧化酶、过氧化氢酶、蔗糖酶的活性呈抑制作用;与香豆素相比较,对羟基苯甲酸的化感作用更为显著。

This experiment uses exogenous application to study the effects of phenolic acids on soil enzyme activities,and aims to provide a scientific reference for revealing the allelopathy mechanism of phenolic acids.Result shows that the concentration of p-hydroxybenzoic acid(A),coumarin(B)and their mixed phenolic acids(H)with a concentration of 0.1-1 mmol·L^(-1) have varying degrees of promotion effect on the activity of polyphenol oxidase,catalase,invertase and urease in the soil;the concentration of 10 mmol·L^(-1) p-hydroxybenzoic acid,coumarin and their mixed phenolic acid substances inhibit the activities of polyphenol oxidase,catalase,and invertase in the soil;compared p-hydroxybenzoic acid with coumarin,the allelopathy of p-hydroxybenzoic acid is more significant.