辽宁省人工林樟子松径向生长对水热梯度变化的响应  

Responses of Pinus sylvestris var. mongolica to gradient change of hydrothermal in plantations in Liaoning Province

作　　者：李露露[1,2] 李丽光[3] 陈振举[1,2,4] 周永斌[1,2,4] 张先亮[1,2] 白学平[1,2] 常永兴 肖建强[1,4] 

机构地区：[1]沈阳农业大学林学院,沈阳110866 [2]中国森林生态系统监测网络辽宁辽河平原森林生态系统定位研究站,昌图112500 [3]中国气象局沈阳大气环境研究所,沈阳110016 [4]中国科学院清原森林生态实验站,沈阳应用生态研究所森林与土壤生态国家重点实验室,沈阳110016

出　　处：《生态学报》2015年第13期4508-4517,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(41271066;31100327;41071035);沈阳农业大学"天柱山学者"计划项目

摘　　要：基于树轮年代学的理论和方法,建立辽宁地区人工林樟子松年轮宽度年表网络,研究人工林樟子松树木年轮生长变化,探讨樟子松生长与气候变化的关系以及其对水热梯度变化的响应规律。结果表明,研究区各采样点人工林樟子松的径向生长变化呈现较为一致的显著下降趋势(P<0.05),并且下降趋势由西北至东南降低。空间上水平上,研究区樟子松的径向生长与研究区降水和相对湿度的空间梯度变化吻合(P<0.05),均呈西北至东南增加的特点;各采样点樟子松年轮宽度变化的平均敏感度与降水量、相对湿度显著负相关关系(P<0.05),但与温度的正相关关系不显著。各样点樟子松径向生长与月降雨量和月平均相对湿度多呈正相关关系,与月平均温度多呈负相关关系,进一步表明区域水分因子对人工林樟子松生长的限制作用明显。A network of P. sylvestris var. developed based on the dendrochronological theory and tree-ring chronologies for plantations in Liaoning province were methodology to study the variation of tree growth of artificial forest, and to investigate the mechanisms of the relationships between tree ring growth and climate variations, and the response variations of tree-ring growth and climate factors along regional hydrothermal gradient. The results showed that a consistently and significantly declining trend was found in the radial growth of P. sylvestris var. mongolica from all sample sites in the study region （ P〈0.05 ）, generally showed a regional decrease profile from northwest to southeast of the study area. Coincide with the regional gradient variations of moisture condition like precipitation and relative humidity （P〈0.05）, the spatial variation of P. sylvestris var. mongolica radial growth showed a stepwise increase from northwest to southeast in study area; the variation of mean sensitivity of these P. sylvestris var. mongolica chronologies in study area negatively correlated with variation of regional annual mean precipitation and annual mean relative humidity （P〈0.05）, but the positive correlation with regional annual mean temperature was insignificant. The pine＇s radial growth in each sampling site was positively correlated with loeal monthly mean precipitation and monthly mean relative humidity, while negatively with monthly mean temperature, which indicated that moisture condition is an obvious limiting factor for P. sylvestris var. rrtongolica growth.

关 键 词：人工林 樟子松 年轮宽度年表 径向生长 水热梯度 

分 类 号：S791.253[农业科学—林木遗传育种]