Changes of Soil Properties Induced by Different Soil Borne Diseases and Their Effects on Ginseng Quality
This study aims to investigate soil differences between ginseng diseased plants(root rot,rust rot,gray mold and black spot)and healthy plants as well as their relationship with ginsenoside content accumulation.Four-year-old diseased and healthy ginseng plants and their rhizosphere soil were used as materials to detect soil physical and chemical properties and soil enzyme activities,and changes in ginsenoside content were determined with HPLC.The results show that pH,EC,available phosphorus,available potassium,sucrase,urease and proteinase in the soil are important indicators of changes in rhizosphere soil properties of diseased plants,and their ranges of change are respectively-9.16％--4.22％,17.35％-156.53％,-63.65％--56.37％,15.28％-66.17％,-27.28％--12.51％,-31.18％--4.56％and 26.47％-67.34％.The determination of ginseng quality indicators show that root dry weight is the most affected by the diseases,and ginsenoside Rb1 is the most sensi-tive to the diseases,with a decrease of 6.43％-36.73％.The comprehensive analysis was conducted using gray correlation.The results show that the correlation between the content of ginseng medicinal components and soil enzyme activities is greater than soil physical and chemical properties,among which pH,alkali-hydrolytic nitrogen,sucrase and acid phosphatase have a significant effect on the accumulation of the content of four ginseng medicinal components.
万方数据
维普
