樟樹、臺灣欒樹和鐵冬青苗木在不同容器下各種逆境處理對生長之影響

Abstract

本試驗於臺大精密溫室進行，以樟樹（Cinnamomum camphora）、臺灣欒樹（Koelreuteria henryi）和鐵冬青（Ilex rotunda）作為試驗樹種材料，目地在探討三樹種以不同的盆器在不同水分和斷根逆境下，以不同持續的時間來檢測其幼苗植株外部型態和葉綠素螢光各參數的變化，本研究將以容器的不同分為兩種：灰黑盆器和火箭盆器；在水分逆境以及斷根處理後各以2天、4天、8天、16天和32天的時間來量測。 結果顯示苗木在三種不同的逆境處理下，樟樹的生長量在處理後未有顯著的差異，在乾旱及淹水處理4天的生長量表現最好。臺灣欒樹在地上部生長量在處理後無顯著的差異，生長量以乾旱及淹水處理4天和8天的表現最佳。鐵冬青的生長量在處理後未有顯著的差異。 苗木在螢光參數的表現，暗適應下的Fv/Fm，樟樹以火箭盆盆器栽種乾旱處理16天和32天明顯低於灰黑盆器栽種乾旱處理；臺灣欒樹以火箭盆盆器栽種乾旱處理16天明顯低於其他處理；鐵冬青以乾旱和淹水處理16天和32天明顯低於其他處理。光適應下個螢光參數的qP和NPQ，樟樹、臺灣欒樹和鐵冬青的處理與對照組無明顯的差異。 在不同的水分逆境處理後，樟樹以乾旱和淹水處理16天及32天受嚴重傷害無法恢復而死亡，以火箭盆淹水處理4天和8天的恢復較佳，在螢光參數均無顯著的差異，顯示樟樹在輕度的逆境下可強化其耐受能力。臺灣欒樹的螢光參數均有恢復的情形，且輕度的逆境可以恢復到正常水準，顯示臺灣欒樹有較高的耐受力。鐵冬青在輕度的逆境，即會造成嚴重傷害無法恢復而死亡，顯示鐵冬青對於水分相當敏感。 以兩種不同的盆器栽種接受不同的逆境，顯示樟樹以火箭盆器栽種表現顯著的是淹水處理4天和8 天；臺灣欒樹火箭盆器栽種以淹水8天表現較佳；鐵冬青以火箭盆器栽種，雖未能降低因逆境受傷的死亡，然而卻可減緩受傷程度。因此，火箭盆器是在培育苗木為成目的最佳育苗容器。

This study investigated three species with different devices in different pots of water and root pruning adversity, with different duration to detect changes in their patterns and seedling plants outside the chlorophyll fluorescence parameters of Camphor tree（Cinnamomum camphora）, Flame Gold-rain Tree（Koelreuteria henryi） and Chinese Holly（Ilex rotunda）in water treatments in the greenhouse of NTU . This experiment container is divided into two types: gray pots and pots rocket ; in water stress as well as in 2 days, 4 days, 8 days, 16 days and 32 days after the time to measure root pruning treatment. The results showed that seedlings at three different stress treatment, the growth of Camphor tree was no significant difference in the post-processing, drought and flooding for four days of growth the best performance. Flame Gold-rain Tree growth aboveground no significant difference in the treatment of drought and flooding in growth for 4 days and 8 days for the best performance. Chinese Holly growth was no significant difference in post-processing. Seedling performance in fluorescence parameters, dark adaptation under Fv / Fm, Camphor tree growth of rocket pots and planted drought is 16 days and 32 days was significantly lower than the gray basin is planted drought; Flame Gold-rain Tree is planted in pots rocket Drought treatment 16 days was significantly lower than other treatments; iron holly to drought and flooding for 16 days and 32 days was significantly lower than other treatments. Under a fluorescent light adaptation parameters qP and NPQ of Camphor tree, Flame Gold-rain Tree and Chinese Holly treatment and control group had no significant difference. After trying out different water stress treatment, Camphor tree to deal with drought and flooding 16 days and 32 days of serious injury and death can not be restored to rocket pots waterlogged 4 and 8 days of recovery is better, the fluorescence parameters are not differences, showing tolerance camphor increase in mild adversity. Fluorescence parameters Flame Gold-rain Tree has picked up the case, and mild stress can be restored to normal levels, indicating a higher Taiwan Luan tree tolerance. Ilex mild adversity, that can cause serious injury and death can not be restored, the display is very sensitive to moisture Chinese Holly. In the face of adversity in different basin is planted in two different display devices Camphor planted rocket pots remarkable performance is flooded for 4 days and 8 days; Flame Gold-rain Tree is planted in pots rocket flooded 8 days fared better; iron holly rocket basin is planted, though failed to reduce deaths due to stress injuries, yet can slow the degree of injury. Therefore, the rocket nurturing seedlings in pots is a purpose for the best nursery containers.