长白山阔叶红松林共存树种径向生长对气候变化的响应  

Growth response of two coexisting species to climate change in broadleaved Korean pine forests in Changbai Mountain, northeastern China.

作　　者：高露双[1] 王晓明[1] 赵秀海[1] 

机构地区：[1]北京林业大学森林资源与生态系统过程北京市重点实验室

出　　处：《北京林业大学学报》2013年第3期24-31,共8页Journal of Beijing Forestry University

基　　金：北京林业大学青年科技启动基金(blx2011004)

摘　　要：利用树木年轮学方法,通过研究长白山阔叶红松林建群树种红松和先锋树种山杨生长特征及其对气候因子的响应,以期揭示不同物种对气候因子的响应差异。结果表明:红松和山杨对气候因子响应关系存在差异。红松主要受上年冬季温度和降水的负作用,山杨主要受到生长季末降水的限制作用。在极端情况下,上一年冬季的高温和较多降水以及当年生长季高温是导致红松形成窄轮的主要原因,而上一年生长季的较多降水和当年春季高温是影响山杨生长的主要原因。因此,树木生长—气候因子的关系具有一定的物种特性。此外,还发现随着温度上升和降水格局的改变,春季降水对红松生长的正效应以及月最低温度对红松和山杨的负效应将逐渐突显,这可能是导致红松适宜区面积缩小的主要因素。In this paper, dendrochronology method was used to reveal the dynamic response way of different species＇ radial growth to cXimate change. Group-species Pinus koraiensis and pioneer-species Populus davidiana were selected in Changbai Mountain of northeastern China. The results showed that radial growth of P. koraiensis was significantly positive with the temperature and precipitation in previous winter （P 〈 O. 05）. Pioneer-species P. davidiana was significantly negative with precipitation in the end of current growing season. In the extreme year, warm and wet winter as well as warm growing season intensified the narrow ring formation of P. koraiensis. The ring-width of P. davidiana was controlled by precipitation in previous and temperature in current spring. The results added the evidence that there was specific response way of trees to climate factors. With the change of climate factors,the positive effect of spring precipitation on P. koraiensis and the limit function of minimum temperature on two species were enhanced. It may lead to the suitable region reduction of P. koraiensis in Changbai Mountain of northeastern China.

关 键 词：径向生长 气候因子 红松 山杨 

分 类 号：S718.5[农业科学—林学]