黄土丘陵区刺槐生长的影响因子研究

Study of Influence Factors of locust Growing in the Loess Hilly Region

通过５年的试验样地定点观测及野外大面积调查，收集了不同条件下的刺槐生长量数据３２０多组，利用方差方析定性得出了显著影响黄土丘陵区刺槐胸径生长的因子有年降雨量林龄、地面坡度、林分密度及地形部位．利用回归分析定量得出了这５个因子对刺槐胸径生长影响的关系模型。影响最显著的因子是年降雨量，其它依次为林龄、坡度、林分密度、地形部位。

Based on the spot measurement and field investigation for five years,according to more than 320 groups data of locust growth rate under different conditions.The variance analysis show that the main effective factors are annual rainfall,crop age,gradient,density of crop and topographic conditions which effects on the locusts normal diameter growth in loess hilly area.Furthermore, using the regression analysis, a relative model about this five factors is obtained as above, from which we can conclude that the most effective factor is annual rainfall, otherwise the crop age, gradient,density of crop and topographic conditions in turn.