Abstract:On the low mountain and hilly region in South Henan,qualitative and quantitative analysis on eleven factors which affect the growth of 2~4 years-old young stand of Catalpa bungti C.A.Mey have been conducted.The results show that the correlation between the growth of the young stand and the site condition is extremely significant.The factors affecting the tree height are arranged in following order: topography>soil depth>soil permeability>slope exposure>soil fertility>soil texture>slope locality>parent rock>slope>sunshine condition>gravel content.The factors affecting the D.B.H.are arranged in following order: topography>soil depth>soil fertility>sunshine condition>slope exposure>soil permeability>slope locality >soil texture>parent rock>gravel content>slope.Among these factors,topography and soil depth are the most significant factors to the growth.We obtain the multivariate line regression equations for the tree height and D.B.H.to the eleven site factors and the major factors,and work out the forecasting table for the young stand growth.