中亚热带红壤丘陵区湿地松生长与气候因子的相关分析

Correlation Analysis of Growth of Pinus elliottii with Climate in Hilly Red Earth Area of Mid-subtropical Zone

用解析木资料对阳坡和阴坡二坡向的湿地松(Pinus elliottii)胸径、树高及材积逐年生长量与气候因子进行相关分析,结果表明:①阳坡向湿地松胸径生长主要受≥10℃积温、日照时数和前一年降水量的影响,复相关系数为0.935;阴坡向湿地松胸径生长只与相对湿度相关,复相关系数为0.901;②两坡向湿地松树高生长模型中入选的气象因子均为均温、日照时数、相对湿度、前一年降水量,复相关系数分别为0.827和0.882,其中光照因子为主导因素;③两坡向湿地松材积生长主要受均温、≥10℃积温、日照时数、相对湿度影响,复相关系数分别为0.749和0.723,其中温度因子为主导因素。

Correlation analysis were conducted on DBH, tree height, volume growth of Pinus elliottii with meteorological factors by data of analytic wood in hilly red earth area of mid-subtropical zone. The result demonstrated that the annual DBH growth of P. elliottii on sun slope was mainly affected by ≥ 10℃ accumulated temperature（≥ 10℃ AT）, sunshine hours（SH） and precipitation of the previous year（PL） with r2 0.935, while annual DBH growth on shade slope significantly correlated to relative humidity（RH） with r2 0.901. The height growth model of the two slopes included annual average temperature（AT）, SH, RH, PL with r2 0.827 and 0.882, among them, annual sunshine hours was the key factor. The annual volume growth ofP. elliottii of the two slopes depended on AT, ≥ 10℃ AT, SH, RH with r2 0.749 and 0.723, among them, temperature factor was the main factors.