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生态学杂志 ›› 2011, Vol. 30 ›› Issue (04): 650-655.

• 研究报告 • 上一篇    下一篇

北亚热带生长期温度对马尾松径向生长的影响

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   

  1. 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
  • 出版日期:2011-04-08 发布日期:2011-04-08

Effects of air temperature in growth season on Masson pine (Pinus massoniana) radial growth in north subtropical region of China.

FENG Xiao-hui1, CHENG Rui-mei1, XIAO Wen-fa1, WANG Rui-li1, WANG Xiao-rong1,2, GAO Bao-qing3   

  1. 1Key Laboratory of Forest Ecology and Environment, the State Forestry Administration|Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China|2Hubei Forestry Academy, Wuhan 470039, China|3Forestry Administration of Nanzheng County, Hanzhong 723011, Shannxi, China
  • Online:2011-04-08 Published:2011-04-08

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。

关键词: 硝态氮, 铵态氮, 氮素营养, 莴笋

Abstract: 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.

Key words: Nitrate nitroge, Ammonium nitrogen, Nitrogen nutrition, Lettuce