关键词: 油松, 木材平均年生产量, 地理-地形-土壤因素, 气候因素, 陕西省

Abstract: Using the method of multivariate statistical analysis, this paper quantitatively evaluates the influence of environmental factors on the timber production of artificial Pinus tabu laeformis forests in Shanxi province. In the group of geographic-topographic-edaphic fac tors, soil type is the prime important factors in affecting the growth of Pinus tabulaefor mis, its contribution amounts to 38.75%. In the group of climatic factors, mean tem perature in July is most important in South Shanxi and Qinling Mountains, it contributes 34.46%; and in North Shanxi, the prime important factor is annual precipitation, whose contribution amounts to 27.80%. Based on the effect of environmental factors and the performance of stands, three growing zones of Pinus tabulaeformis in Shanxi province are devided, and each zone is characterized by environmental factors and growing performan ces.

Key words: Pinus tabulaeformis, Volume mean annual increment, Geographic-topographicedaphie factors, Climatic factors, Shanxi province