塞罕坝华北落叶松生长与气候因子的相关分析

用逐步回归方法，分析了塞罕坝地区华北落叶松生长与气候因子的相关关系。结果表明:①影响华北落叶松胸径、树高连年生长的主导气候因子分别为≥10℃的有效积温和年平均气温、上年11月—当年1月的平均蒸发量；②气候因子间是相互影响、相互制约、共同作用的，并通过单优势性、协同作用、拮抗作用等形式对华北落叶松生长产生直接和间接影响。 

Correlated analysis between the growth of Larix principis-rupprechtii and climatic factors in Saihanba Nature Reserve,northern Hebei Province

The relations between the growth of Larix principis rupprechtii and climatic factors were analyzed by stepwise regression method. The results showed that: 1）the dominant climatic factors influencing the successive annual growth of diameter and height of L. principis rupprechtii were ≥10℃ effective accumulated temperature，annual mean temperature and the mean evaporation from November of previous year to January of present year；2)there were mutual influence, mutual restriction and interaction among climatic factors. Those factors affected L. principis rupprechtii directly and indirectly by the forms of single advantage, synergistic effect and antagonism．