油松家系群体早期高生长对气候的响应

针对河北遵化东陵油松种子园自由授粉的44个家系和当地自然生油松品种,研究影响油松幼林高生长的主导气候因子,为油松幼林的经营管理提供科学的理论依据。通过育苗造林后15年生的油松进行连续10 a的高生长量调查,结合当地相应年份的气候资料,运用相关性分析、冗余分析法探究油松幼林高生长与气候因子的关系,并建立油松高生长与气候因子的最优多元回归模型。结果表明,油松幼树高生长受到温度和降水的综合影响,在温度因子中,主要受到前一年夏季（尤其是6月）的平均气温、极端最高温以及地温的影响;在水分因子中,前一年春季以及前一年11月的降水量为影响油松幼树生长的主导因子。

Response of Early Height Growth of Pinus tabuliformis Family Population to Climate

Taking 44 families of freely pollinated Pinus tabuliformis seed orchard in Zunhua,Hebei Province and local natural P.tabuliformis varieties as the research objects,the main climatic factors affecting the growth of young P.tabuliformis forests were studied to provide theoretical basis for the management of young P.tabuliformis forests.After 15 years of seedling and afforestation,the height growth of P.tabuliformis was investigated for 10 consecutive years,combined with the local climate data of the corresponding year,and the correlation analysis and redundancy analysis method were used to explore the relationship between the height growth of young P.tabuliformis and climate factors.Optimal multiple regression model of the height growth and climate factors was established.The results showed that the height growth of young pine trees was affected by temperature and precipitation.Among the temperature factors,the height growth was mainly affected by the average temperature of the previous summer(especially June),the extreme maximum temperature and the ground temperature.In the moisture factor,the precipitations in the spring of the previous year and November of the previous year were the dominant factors.