| Ginseng is the dried root of Araliaceae ginseag-Panax ginseng C. A. Meyer. It has anti-aging, antioxidant, enhance immunity, and other pharmacological effects. China has large-scale cultivation of ginseng, and Jilin Province is a major producer of ginseng, whose plant reference area, yield and output value ranked first in the country, but the traditional use of "plant parameters of deforestation" caused the huge loss of soil and water and serious damage to the environment. Therefore, the farmland ginseng planting is key to sustainable development of the ginseng industry.The farmland planting often has many mixing occurs of diseases, such as:rust, rot, damping-off disease, diseases, damping-off and so on. Rust and rot of ginseng is the most common disease of the most harm. It can result in some root rot, or even the whole death, and directly affect the yield and quality of ginseng.The experiment determined and analyzed the differences of the major elements, trace elements, and defense enzymes of the health and illness ginseng leaves; it also determined and analyzed the differences of the major elements, trace elements, defense enzymes and saponin of the health and illness ginseng roots:it finally determined and analyzed the changes of the major elements, trace elements, enzymes and microbe of the health and illness ginseng rhizosphere. Which provided a scientific basis for the reasonable control rust rot the farmland Ginseng. The results are as follows:1. The determination of the major elements (N, P, K) and trace elements (Fe, Mn, Cu, Zn) in the sick and healthy ginseng leaves. The contents of N, P, K in the sick ginseng leaves were lower than the ones in the healthy ginseng leaves, the lower of K was maximum with the rate of 23.99%, the lower of N was minimum with rate of 22.29%. The contents of 4 trace elements in the sick ginseng leaves were higher than those of the healthy ginseng leaves. The rate of increase was:Fe>Mn> Zn>Cu, the rates of increase were:272.15%,148.94%,135.66%,30.00%.2. The determination of the major elements (N, P, K) and trace elements (Fe, Mn, Cu, Zn) in the sick and healthy ginseng roots. The contents of N, P, K in the sick ginseng roots were lower than the ones in the healthy ginseng roots, the lower of K was maximum with the rate of 48.10%, the lower of N was minimum with rate of 15.56%. The contents of 4 trace elements in the sick ginseng roots were higher than those of the healthy ginseng roots. The rate of increase was:Zn>Fe> Mn>Cu the rates of increase were:246.15%,175.47%,45.56%,26.03%.3. The determination of the major elements (N, P, K) and trace elements (Fe, Mn, Cu, Zn) in the sick and healthy ginseng earth. The different levels contents of soil nitrogen and nitrogen of the Ginseng health and disease were:upper>middle>lower. The upper, middle, lower total nitrogen content of the sick Ginseng soil were higher than those of ginseng soil, the rates of increase were:20.43%, 19.32%,5.88%. The nitrogen contents of the upper and middle ginseng soil were higher than that of ginseng soil, the rates of increase was 30.04% and 20.07%. The nitrogen content of lower Ginseng soil is lower than healthy ginseng soil, the rate was 38.92%. Middle-level total P and available P in health and illness ginseng soil were the highest, then the ones of the upper and lower were the lowest. Ginseng sick soil in the next three total P and available P were higher than that of ginseng soil. Soil health and disease ginseng total potassium and available potassium content of the middle were the highest, the upper and lower were the lowest. Ginseng sick soil in the next three total potassium and available potassium were higher than that of ginseng soil. The contents of Fe,Mn, Cu, Zn in health and disease ginseng soil were the highest in middle. The Fe and Mn contents of the upper, middle and lower of Ginseng sick soil were lower than those of the healthy ginseng soil, while the contents of Cu and Zn in the soil were higher than those of ginseng ginseng soil.
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