摘要
运用LI-6400测定弄拉峰丛洼地恢复树种菜豆树、椿、任豆、马蹄竹、银合欢的光合生理生态特性,比较它们的净光合速率Pn等4种生理指标及其群落中对应的光合有效辐射PAR等生态指标日变化。结果表明,峰丛洼地生态环境因子日变化复杂,不同恢复树种群落对小气候调控有差异。任豆和菜豆树的平均净光合速率最大,银合欢有明显的"午休"现象,菜豆树的平均蒸腾速率E最大,银合欢和任豆的水分利用效率最高,椿的表观量子效率最高。不同恢复树种光合作用的影响因子有差异。以逐步回归方式建立的净光合速率和影响因子之间的回归方程模型均有显著性意义和良好的预测性。
Physiological characters of different restoration tree species in NongLa peak cluster depression were mensurated by LI-6400,such as Raderrnachera sinica , Toona sinensis ,Bambusa lapidea ,Zenia insighis and Leacaena leucacephala. By comparing their daily change of net photosynthetic rate Pn,and solar radiation PAR,etc,it can be found that environment factors daily changes were complex. Communities of different restoration tree species adjust to the microclimate differently. Zenia insignis and Radermachera sinica were in higher average Pn level. Leacaena leucacephala showed ＂midday depression＂ of photosynthesis obviously. Radermachera sinica was in higher average E level. Leacaena leucacephala and Zenia insignis were in higher average WLTE level. Toona sinensis was in the highest average AQE level. Different factors influenced photosynthesis of these restoration tree species differently. Stepwise regression method was used to establish linear regression equations of net photosynthetic rate and various factors, which were statistically significant and had a good preditability.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2010年第1期47-53,共7页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家"十一五"科技攻关课题(2006BAC01A10)
国家科技支撑计划(2008BAD98B07)
国家自然科学基金(40872214)
广西自然科学基金(桂科基0639067)
岩溶地质研究所所控项目(2008009
2008010
2009006
2009007
2009008)
广西师范学院基金(08KE01)
湖南省教育厅优秀青年项目(08B093)
教育厅面上项目(200911MS142)
关键词
峰丛洼地
恢复树种
净光合速率
生理生态因子
peak cluster depression
restoration tree species
net photosynthetic rate
ecophysiological factors
