Abstract: The provenance differences of Pinus massoniana Lamb. Between the Rongxian, in Guangxi Province and the Longli in Guizhou Province in stand structure and growth effect are analysed comparatively.Based on the stand growing stock volume at present, combining the predict model of timber assortment yield and technically economic target in the studing region, the economic effcts are evaluated by a dynamic analysis method. The results show that the species introduced from Rongxian County is feasible, the stand productivity of the Rongxoan provenance is higher than that of the Longli provenance under the same site conditions, among which the height, DBH, and growing stock are 15.0—21.7%, 5.4-19.1% and 28-40% higher respectively,the economic benefit and net present value (NPV) increase 38.96-61.28% and 69.78-91.76% respectively. The differences in single tree timber volume enhance with the increase of stand ages, but the increasing percentage decrease.With the increment of site index, the economic benefit, NPV,and benefitcost ratio increase.

Key words: Pinus massoniana Lamb., Provenance, Planting result, Economic analysis