南岭华南五针松树轮宽度对气候因子的响应

Responses of Tree-ring Width of Pinus Kwangtungensis to Climaic Factors in Nanling

应用树轮气候学研究方法建立了广东南岭地区华南五针松(Pinus kwangtungensis)树轮宽度的标准年表和差值年表。选用1965—2013年7月至当年12月的月平均温度、月最高温度、月最低温度、月降水量和月平均相对湿度作为气候因子,研究华南五针松树轮宽度对这些气候因子的响应。结果表明:华南五针松差值年表各项统计参数优于标准年表,更适于与气候因子进行相关分析;华南五针松树轮宽度对温度变化的响应比降水更敏感;影响华南五针松径向生长的主要限制因子是春季(2—4月)温度(正相关),其次是春季相对湿度(负相关)和夏季(5—8月)降水(正相关)。

The standard chronology （STD） and residual chronology （RES） of Pinus kwangtungensis growing at Nanling Nature Reserve, Guangdong province, are developed to study their relationships with climatic factors （the monthly mean, maximum, minimum temperature, monthly precipitation and monthly mean relative humidity from previous-year July to current-year December during 1965-- 2013）. Considering statistical characteristics of the two chronologies, we find that RES of P. kwang- tungensis is more reliable than STD for analyzing the relationship with climatic factors. The radial growth of P. kwangtungensis is more sensitive to temperature than to precipitation. The mean tempera- ture, the mean relative humidity in spring （February to April） and the precipitation in summer （May to August） are important factors positively and negatively, respectively, influencing the radial growth of P. kwangtungensis in Nanling region.