The effects of intermittent flooding on seedlings of three forest species
The effects of intermittent flooding on seedlings of three forest species
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DOI：
10.1023/a:1007163206642
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发表时间：
1999-01-01
期刊：
影响因子：
2.7
通讯作者：
Pezeshki, SR
中科院分区：
文献类型：
--
作者：
Anderson, PH;Pezeshki, SR
在温室条件下，幼苗的三个森林物种，落羽杉（红豆杉），nuttall橡树（栎nuttallii），和沼泽栗树（栎michauxii）进行了间歇性洪水和随后的生理和生长反应，这样的条件进行了评价。落羽杉的气孔导度（g（s））或净光合速率（PN）没有显着降低响应洪水脉冲。在nuttall栎苗g（s）和P-N显着下降，在淹没期间，但迅速恢复排水。相比之下，在沼泽板栗橡树g（s），减少了71.8%，而PN减少了57.2%，与对照组相比。Baldcypress的总质量没有显着变化，而橡树种有显着降低叶和总质量相比，各自的控制。因此，扁柏和坚果橡树表现出上级的性能，频繁的间歇性洪水制度下，由于几个因素，包括快速恢复的气体交换后不久，土壤被排水的能力。相比之下，沼泽板栗橡树苗未能恢复气体交换功能后，消除洪水。
Under greenhouse conditions, seedlings of three forest species, baldcypress (Taxodium distichum), nuttall oak (Quercus nuttallii), and swamp chestnut oak (Quercus michauxii) were subjected to an intermittent flooding and subsequent physiological and growth responses to such conditions were evaluated. Baldcypress showed no significant reductions in stomatal conductance (g(s)) or net photosynthetic rate (PN) in response to flood pulses. In nuttall oak seedlings g(s) and P-N were significantly decreased during periods of inundation, but recovered rapidly following drainage. In contrast, in swamp chestnut oak g(s), was reduced by 71.8% while PN was reduced by 57.2% compared to controls. Baldcypress displayed no significant changes in total mass while oak species had significantly lower leaf and total mass compared to their respective controls. Thus baldcypress and nuttall oak showed superior performance under frequent intermittent flooding regimes due to several factors including the ability for rapid recovery of gas exchange soon after soil was drained. In contrast, swamp chestnut oak seedlings failed to resume gas exchange functions after the removal of flooding.