文献类型：期刊文献

中文题名：北亚热带生长期温度对马尾松径向生长的影响

英文题名：Effects of air temperature in growth season on Masson pine(Pinus massoniana)radial growth in north subtropical region of China

作者：封晓辉[1] 程瑞梅[1] 肖文发[1] 王瑞丽[1] 王晓荣[1,2] 高宝庆[3]

第一作者：封晓辉

机构：[1]中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京100091;[2]湖北省林业科学研究院,武汉470039;[3]陕西省南郑县林业局,陕西汉中723011

年份：2011

卷号：30

期号：4

起止页码：650-655

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家林业局林业公益性科研专项(200804001);中国林科院森林生态环境与保护研究所专项(CAFREEP201006)资助

语种：中文

中文关键词：马尾松;年轮;温度;活动积温;生长期

外文关键词：Masson pine（Pinus massoniana）; tree ring; temperature; active accumulated temperature; growth season

分类号：S716.3;S792

摘要：近几十年由于温度升高导致的植物生长期的延长已经得到了证实,虽然生长期的长短变化会引起树木生产力变化,但不同起始温度的生长期对树木径向生长的影响尚不明确。为了探索不同起始温度的生长期变化对马尾松生长的影响,找出马尾松生长的敏感温度,本研究选择北亚热带西北边缘汉中地区的老龄马尾松为对象,应用树木年轮学的方法得到了马尾松从1945年到2009年的年轮宽度指数;同时利用汉中气象站的日均温度,计算每一年不同温度的初日、终日、持续时间以及生长期活动积温;分析生长期的变化规律和不同温度生长期对马尾松生长的影响。结果表明:6.0℃～7.5℃的开始时间对年轮宽度有负影响,6.0℃的初日对马尾松的生长最明显,10.5℃的终日时间对生长有显著促进作用;10.0℃和10.5℃的生长期与马尾松生长正相关最为显著,生长期活动积温对生长的影响也较为显著。这些敏感温度分别对应马尾松春季开始萌动、针叶出现以及秋季形成层活动停止时的温度,说明温度的变化导致物候期的变化进而影响植物的年生长量。
Longer growth season has been confirmed due to the elevated temperature in recent decades.Though the changes in the duration of growth season could affect tree productivity,it＇s unclear how the growth season with different initiating temperature affects the radial growth of tree.In order to investigate the effects of growth season＇s variability in temperature to the radial growth of Masson pine（Pinus massoniana）and search for the sensitive temperature to the growth,old Masson pine stands in Hanzhong,the northwest margin of north subtropical region,were chosen as test objects,with their tree ring width index chronology from 1945 to 2009 measured by dendrochronology method.The air temperatures on the first day,last day,and in the whole growth season as well as the active accumulative temperature during growth season were determined based on the daily mean temperature of Hanzhong,and the relationships between the temperatures and chronology were analyzed.The results showed that the growth season with initiating temperature 6.0 ℃-7.5 ℃ had negative effects on the tree ring width index chronology,with 6.0 ℃ being most significant.10.5 ℃ on the last day had significant positive effects on tree ring growth.10.0 ℃ and 10.5 ℃ in growth season were significantly positively correlated with the tree ring growth,and the active accumulative temperature during growth season was also significantly positively correlated with the growth.These sensitive temperatures were respectively corresponding to the onset of photosynthesis,needle emergence in spring,and shutting down of cambium activity in autumn.Our study suggested that elevated temperature led to the changes in phenophase,and thereby,affected the radial growth of P.massoniana in Hanzhong.