辽东天然次生林中五种阔叶树生理特征比较研究

生态学杂志 ›› 2004, Vol. ›› Issue (5): 106-110.

辽东天然次生林中五种阔叶树生理特征比较研究

张放¹, 胡万良², 孔祥文²

1. 中国科学院沈阳应用生态研究所, 沈阳, 110016;
2. 辽宁省森林经营研究所, 丹东, 118002

收稿日期:2003-04-15 修回日期:2003-05-26 出版日期:2004-10-10
通讯作者: 张放,男,1959年生,教授级高工.1982年毕业于沈阳农业大学林学系,1993～1995年国家公派赴日本留学.主要从事森林培育、森林生态方面的研究.
基金资助:
国家自然科学基金项目(30270250);中国科学院百人计划项目(KOTCE03971003)资助

Comparison of five broad-leaved seedlings' physiological characteristics in natural secondary forest of eastern Liaoning

ZHANG Fang¹, HU Wanliang², KONG Xiangwen²

1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Liaoning Institute of Forest Management, Dandong 118002, China

Received:2003-04-15 Revised:2003-05-26 Online:2004-10-10

摘要/Abstract

摘要： 对辽宁东部山区天然次生林中5种主要阔叶树幼树(2年生),进行人工控制光照强度模拟试验,研究其主要生理特性。结果表明,5种阔叶树在极弱光照条件下(透光10%)光合作用弱,最大净光合速率在4～6μmolCO₂·m^-2·s^-1,不同树种间差异不大;随着光环境的改变,光合作用加强,树种间差异较大,紫椴、水曲柳、花曲柳光合速率提高缓慢,黄菠萝、蒙古栎光合速率提高迅速;紫椴、水曲柳、花曲柳的光补偿点、暗呼吸速率均较低,能利用较弱的光进行物质积累;黄菠萝、蒙古栎的光饱和点高,光合作用潜力大,能充分利用林内较大的光斑;光照环境的改变,幼树干物质积累发生变化。椴树、水曲柳、花曲柳全光区生物量是弱光区(透光10%)的2.91～5.44倍,黄菠萝、蒙古栎全光区生物量是弱光区(透光10%)的16.62～19.42倍。

关键词: 限氧自养硝化-反硝化, 生物脱氮, 溶解氧

Abstract: Artificially controlled light illumination on five major broad-leaved seedlings (2 years) was tested in the mountains area of Liaoning,in order to study their physiological characteristics. The results showed that alls species have very feeble photosynthesis under lower light environment (relative illumination 10%),with maxmium net photosynthetic rate (Pn) at 4～6 μmol CO₂·m^-2·s^-1.There was a little significant difference among species. The photosynthesis changes with the illumination and showed significant difference between species. The Pn of Tilia amurensis, F.mandshurica, and F.rhynchophylla increase slowly while that of Pherodendron amurense and Quercus mongolica increase quickly. At the same time, the light complementation point (LCP) and dark expiration rate of T. amurensis, F. mandshurica, and F. rhynchophylla are lower respectively and can accumulate substances using lower light. The LCPof P. amurense and Q. mongolica, however, are higher and have great photosynthetic potential using facula under crown. The changes of light have an effect on accumulation of seedlings' dry biomass. The biomass of T. amurensis, F. mandshurica, and F. rhynchophylla under full light environment is 2.91～5.44 times higher than that under feeble light (RI 10%).Biomass of P. amurense and P.Q.mongolica under full light environment is 16.62～19.42 times higher than that under feeble light (10%).

Key words: OLAND, Biological nitrogen removal, Dissolved oxygen

中图分类号:

Q945

张放, 胡万良, 孔祥文. 辽东天然次生林中五种阔叶树生理特征比较研究[J]. 生态学杂志, 2004, (5): 106-110.

ZHANG Fang, HU Wanliang, KONG Xiangwen. Comparison of five broad-leaved seedlings' physiological characteristics in natural secondary forest of eastern Liaoning[J]. cje, 2004, (5): 106-110.

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