[Correlation of Agronomic Character of Panax notoginseng in Guangxi with Soil Physical and Chemical Properties].

Objective: To study the effect of physicochemical characteristics of soil on Panax notoginseng agronomic character, in order to offer the theory for selecting an appropriate soil to cultivate Panax notoginseng, and to build the production bases. Methods: To test and analyze Panax notoginseng agronomic character, to analyze the form of layered soil particles, p H value and soil fertility. At the same time, the analysis of Panax notoginseng plant height, leaf number, the length of taproot, the width of taproot, stem diameter, the width of residual part of stem, rootlet number, root fresh and dry weight and drying rate were carried out. Results: Panax notoginseng agronomic character had a large difference. The length of roots, the width of roots and a large number of rootlets had a promoting effect on accumulating biological yield. Nevertheless, the numbers of branches had no obvious impact on accumulating biological yield. Most of soil texture were silty clay or light clay of silty clay. Physical clay and coarse silt could promote the growth of Panax notoginseng. Sand grain had significant effect on Panax notoginseng growth. A reasonable use of nitrogenous fertilizer had a prominent promoting effect on the width of the medicine's root. In fact, the use of phosphorus potassium also had a great impact on Panax notoginseng growth. Conclusion: Panax notoginseng should be planted on the light clay which are loose and can irrigate and drain conveniently and contains many silty. The heavy clay soil which are defective aeration and contain cosmid has a bad influence of the growth of Panax notoginseng. It will cause a decrease of the yield of medicinal materials. Using nitrogenous fertilizer aptly also is an effective way to improve the quality and yield of Panax notoginseng.