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应用生态学报 ›› 2017, Vol. 28 ›› Issue (7): 2102-2110.doi: 10.13287/j.1001-9332.201707.008

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武夷山不同海拔植物水分利用效率的变化及其与养分变化的关系

孔令仑1,2, 林捷3, 黄志群1,2*, 余再鹏1,2, 徐自坤4, 梁艺凡1,2   

  1. 1福建师范大学地理科学学院, 福州 350007
    2湿润亚热带山地生态国家重点实验室培育基地, 福州 350007
    3福建省林业科学研究院, 福州 350012
    4福建武夷山国家级自然保护区管理局, 福建武夷山 354315
  • 收稿日期:2017-01-20 修回日期:2017-04-03 发布日期:2017-07-18
  • 通讯作者: *mail:zhiqunhuang@hotmail.com
  • 作者简介:孔令仑,女,1992年生,硕士研究生.主要从事森林生态研究.E-mail:1134987743@qq.com
  • 基金资助:
    本文由国家重大科学研究计划项目(2014CB954002)和国家自然科学基金项目(41371269,31570604)资助

Variations of water use efficiency and its relationship with leaf nutrients of different altitudes of Wuyi Mountains, China

KONG Ling-lun1,2, LIN Jie3, HUANG Zhi-qun1,2*, YU Zai-peng1,2, XU Zi-kun4, LIANG Yi-fan1,2   

  1. 1College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
    2Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
    3Fujian Academy of Forestry Science, Fuzhou 350012, China
    4Administration of National Natural Conservation of Wuyi Mountains in Fujian Province, Wuyi-shan 354315, Fujian, China
  • Received:2017-01-20 Revised:2017-04-03 Published:2017-07-18
  • Contact: *mail:zhiqunhuang@hotmail.com
  • Supported by:
    This work was supported by the National Basic Science Research Program of China (2014CB954002), and National Natural Science Foundation of China (41371269,31570604).

摘要: 以武夷山不同海拔(600、900、1300、1500、1800、2000和2100 m)的乔木、灌木和草本3种生活型植物为研究对象,观测其水分利用效率和叶片氮、磷养分浓度随海拔的变化趋势,旨在探索海拔梯度间水分、养分变化与植物水分利用效率变化的关系.结果表明: 植物水分利用效率随海拔的增加呈显著上升趋势,乔木叶片δ18O随海拔变化不显著.总体上看,叶片氮浓度未观测到规律性的变化,高海拔地区的叶片磷浓度显著高于低海拔地区.水分利用效率与叶片磷浓度呈显著正相关,而与叶片氮浓度相关性不显著.不同海拔植物水分利用效率变化主要由光合速率的变化引起,水分状况对植物水分利用效率的影响不显著.海拔梯度间植物叶片磷浓度的差异对光合速率影响显著,进而影响水分利用效率.

Abstract: We determined the water use efficiency and nitrogen and phosphorus concentrations of plants at different altitudes (600, 900, 1300, 1500, 1800, 2000, 2100 m) in Wuyi Mountains to understand the relationship of water use efficiency with foliar nutrients. The results showed that plant water use efficiency increased with altitude, and the leaf δ18O of tree showed no significant variance with altitude. On the whole, leaf nitrogen concentration showed no obvious trend, while leaf phosphorus concentration at high altitude was significantly higher than that at low altitude. No significant relationship between water use efficiency and foliar nitrogen concentration was found in this study, but water use efficiency had a positive correlation with foliar phosphorus concentration. In conclusion, the change of water use efficiency was mainly caused by the difference in photosynthetic rate. The effect of water status on plant water use efficiency was not significant. The variances of leaf phosphorus concentrations along the altitudinal gradient may affect photosynthetic rate and in turn the water use efficiency of plant in this area.