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《Bulletin of Botanical Research》 1988-04
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STUDY ON RELATIONS BETWEEN CROWTH OF KOREAN PINE AND FACTORS OF CLIMATIC ECOLOGY

Zhang Shi-zeng;Chen Yan-zi Yichun Forestry Administration Bureau, Heilongjiang  
In the study, height index of tree was taken as the index number oreffect of climatic factors. Throgh analysis of multivariate Linear stepwise regression equation-and principal component analysis, the results wers as follows: Korean pinewas a relatively sensitive species iu response to climatic facors. The effectof climatic ecology factors on the growth of Korean pine was complexbecause different kinds of climatic ractors did not exist independently andthey effected each other and restricted each other. Those factors effectedKorean pine directly and indirectly in forms of single dominance or syne-rgy or antagonism. The effect of climatic ecology factors on Korean pinewas integrated influence of different factors. And each factor has differentinfluence on growth of Korean pine. The greatest iufluence was≥10℃ acu-mulative temperature, that was 52.79%. Raifall was the next to it, makingup 18.62%. The influence of the two was 71.41%, which were leading fa-ctors effecting Korean pine growth. regression equation was Y=0.2924577+6.26395531×10~(-5)x_2+6.45308913×10~(-5)x_4 (x_2=rainfall, x_4=≥10℃ acumulative temperature.)
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