【摘要】 该文作者应用主成份分析方法(PCA)研究了几个气象因子与油松人工林高生长的关系。结果表明:在太行山区石灰岩山地,油松在旺盛生长期(5月份)内的水分状况是影响其高生长的主导生态因子。更多还原

【Abstract】 The studies were carried out in Pingshun, Shanxi Province, on the west part of Taihang Mountain. Pinus tabulaeformis is the most important conifer in the north of China. In this paper, Principle Components Analysis (PCA) was used to study the relationship between several meteorological factors and the annual height growth of the Pinus tabuIaeformis plantation. The first principle component, made up of 9 meteorological factors including relative humidity, precipitation, evaporation, wind speed and 0.0 m soil temperature in May and 0.4m soil temperature in March, etc., reflected the changes of soil and atmospheric moisture in May——the fast-growing period of this pine. In this area, the leading ecological factor influencing height growth of Chinese pine is the water status in May.更多还原