Stem Radial Growth Features of Picea meyeri Responding to Environmental Factors at the Treeline of Luya Mountain
The Stem Radial Growth (SRG) was measured by dendrometer from 6 sample trees of Picea meyeri at the tree-line of Luya Mountain, North China, combined with synchronized instrumental observation and measurement of habitat temperature, moisture, etc., from July the 15th to August the 7th (summer phase) and from September the 5th to October the 9th (autumn phase) in 2007. The preliminary analytic results were as follows: 1) the diameter of stems varied on sunny days with a daily fluctuation but steadily widened, while on rainy days it continuously increased during the rain but shrank rapidly after the rain. 2) The SRG pattern in both phases was fitted with a quadratic curve, showing a positive value in summer phase; whereas declining to a negative figure in the first stage of autumn phase --early September, and then kept as a constant zero from middle September on. 3) The distance analysis showed a relative warmer and moister environment was suitable for the growth of Picea meyeri in autumn phase, whereas an environment with a high relative humidity (RH) in the air and moisture in the soil was suitable in summer phase. Thus the water regime was the controlling factor for Picea meyeri growth on treeline of Luya Mountain.
Treeline of Luya Mountain in North China SRG temperature and water conditions Picea meyeri
Yang Yan-gang Jiang Yuan Zhang Wen-tao Dong Man-yu
State Key Laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University,Beijing,China Institute of resources science College of resources science & Technology Beijing Normal University Beijing,China
国际会议
北京
英文
1-6
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）