香草醛、肉桂酸胁迫下嫁接对茄子根际土壤微生物数量和土壤酶活性的影响

试验以自根茄子为对照,研究了外源香草醛、肉桂酸胁迫下嫁接对茄子根际土壤微生物数量和土壤酶活性的影响.结果表明,随着香草醛、肉桂酸浓度的增加,嫁接茄子的细菌数量先增大后减小,放线菌数量差异不明显,真菌数量是先降低后增加.除了脲酶活性是一直增大,其他酶活性基本表现为先增大后降低的规律.在香草醛、肉桂酸胁迫下嫁接茄子细菌和放线菌的数量均显著高于自根茄子,真菌的数量显著低于自根茄子.嫁接茄子的过氧化氢酶、多酚氧化酶、脲酶、蛋白酶、蔗糖酶的活性均高于自根茄子,但过氧化物酶和磷酸酶的活性自根茄子高于嫁接茄子.

Effects of Grafting on Soil Microbe Amounts and Enzyme Activities of Eggplants under Vanillin and Cinnamic Acid Stress

With own-root eggplants as control,effects of grafting on soil microbe quantities and enzyme activities of eggplants were studied under exogenous vanillin and cinnamic acid stress.The resups showed that with the increasing concentration of vanillin and cinnamic acid,the amounts of bacteria in grafted eggplant rhizosphere increased at first,then decreased;the amounts of actinomycetes were not obviously different;andfungi decreased at first,then increased.With the increasing concentration of autotoxins,the soil enzyme activities also increased at first and the decreased except urease that increased all along.The amounts of bacteria and actinomycetes of grafted eggplants were significandy higher than those of the control,but the amounts of fungi were obverse.The activities of catalase,polyhenol oxidase,urease,p ro tea se,saccharase of grafted eggplants were higher than those of the control,but the activities of peroxidase and phosphatase were obverse.