首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Shoot growth of mature Fagus sylvatica and Picea abies in relation to ozone
Authors:Braun Sabine  Schindler Christian  Rihm Beat  Flückiger Walter
Institution:Institute for Applied Plant Biology, Sandgrubenstrasse 25, CH-4124 Sch?nenbuch, Switzerland. sabine.braun@iap.ch
Abstract:Epidemiological analysis of sequential growth data may be a tool in assessing ozone sensitivity of mature trees. Annual shoot growth of mature Fagus sylvatica in 83 Swiss permanent forest observation plots and of Picea abies in 61 plots was evaluated for 11 and 8 consecutive years, respectively, using branches harvested every 4 years. The data were assessed as annual deviation from average growth and related to fructification, ozone, meteorological parameters, and modelled soil water content using a mixed linear model. In beech, a significant association between ozone and shoot growth was observed which corresponded to a 7.4% growth reduction between 0 and 10 ppm h AOT40 (accumulated ozone over threshold 40). This is in the same order of magnitude as the response observed in experiments with seedlings. No interaction was found between ozone and drought parameters. In Norway spruce, shoot growth was neither associated with ozone nor with drought.
Keywords:
本文献已被 PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号