Correlation between Ginseng Root Rot and Main Chemical Proper-ties and Enzyme Activities of Rhizosphere Soil
In order to clarify the relationship between the occurrence of root rot of ginseng and the chemical properties and enzyme activities of ginseng rhizosphere soil under different cultivation modes(deforestation soil,farmland soil and second-batch forest soil)and different cultivation sys-tems(transplanting 2-2-year-old system),growing in the same soil for four years system).The main chemical properties and soil enzyme activities of 60 rhizosphere soil samples from ginseng with dif-ferent disease grades under three cultivation modes and two cultivation systems were studied with ag-rochemical analysis,independent sample T-test and correlation analysis.The results showed that un-der the same cultivation mode and system,there were significant differences in chemical properties and enzyme activities between the rhizosphere soil of healthy and diseased ginseng(P＜0.05),and the contents of organic matter,available potassium,alkali hydrolyzable nitrogen,pH,catalase and su-crase in healthy ginseng rhizosphere soil were significantly higher than those in diseased ginseng rhi-zosphere soil.There were no obvious change rules in available phosphorus,alkaline phosphatase and urease;The results of correlation analysis showed that the disease indexes of root rot of ginseng were significantly negatively correlated with soil organic matter,available potassium,alkali hydrolyzable nitrogen,pH value,sucrase and catalase activities,and significantly positively correlated with avail-able phosphorus content,but not with urease and alkaline phosphatase activities.In conclusion,soil organic matter,available potassium,alkali hydrolyzable nitrogen,pH value,sucrase and catalase ac-tivities are closely related to the occurrence of root rot.The research results will provide a theoretical reference for the improvement of ginseng soil,the selection of ginseng land and the prevention and control of ginseng root diseases.It will also lay a foundation for further establishment of soil diagnosis model suitable for cultivation of ginseng.
万方数据
维普
