Effects of Ginseng Rust Rot on Ginseng Quality and Soil Related Factors
In order to study the effect of ginseng rust rot on ginseng quality and soil related factors,the rust rot infested ginseng,healthy ginseng and its rhizosphere soil were used as materials to detect soil physicochemical properties and soil enzyme activities.The contents of phenolic acid and saponin in ginseng root and rhizosphere soil were determined by high performance liquid chromatography(HPLC),and the number of pathogenic bacteria in soil was determined by molecular means.The results showed that ginseng root saponin content decreased by 50.1％～72.5％with rust rot increase;the soil and root secretion of the kinds of allelochemicals,content was closely related to the degree of ginseng disease,part of the saponins class matter content increased,the highest increased by 7.5 times,and the frequency increased;succinic acid,cinnamic acid content was significantly higher than healthy plants,compared with the healthy plant,and it increased 3.69 and 2.39 times,respectively.The determination of soil factors showed that except catalase activity increased with the aggravation of the disease,the other soil quality indexes decreased with the aggravation of the disease,among which the reduction of available phosphorus was as high as 55.0％,and the content of soil quality decreased at the initial onset of the disease,it could characterize the occurrence of ginseng rust rot.According to the correlation analysis,the gray correlation degree between the number of pathogenic bacteria and soil factors was 0.362 5～0.497 5,and the gray correlation degree between the number of pathogenic bacteria and allelochemicals was 0.182 5～0.619 9.Above results indicated that the quality of ginseng would be affected directly or indirectly after the disease of ginseng.Therefore,improving the soil environment,regulating the soil ecological balance and reducing the incidence of ginseng disease were one of the ways to improve the quality of ginseng.
ginseng qualityrust rotphysical and chemical properties of soilsoil enzyme activitymolecular detection
国家科技期刊平台
NSTL
万方数据
