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研究生:林敬凱
研究生(外文):Ching-Kai Lin
論文名稱:二氧化碳和溫度對木荷苗木生長及生理反應之影響
論文名稱(外文):Effects of Carbon Dioxide and Temperature on the Growth and Physiological Responses of Schima Superba Seedlings
指導教授:許博行許博行引用關係
指導教授(外文):Bor-Hung Sheu
學位類別:碩士
校院名稱:國立中興大學
系所名稱:森林學系
學門:農業科學學門
學類:林業學類
論文種類:學術論文
論文出版年:1995
畢業學年度:83
語文別:中文
論文頁數:62
中文關鍵詞:二氧化碳溫度生長光合作用氣孔密度
外文關鍵詞:carbon dioxidetemperaturegrowthphotosynthesisstomatal density
相關次數:
  • 被引用被引用:7
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本研究係探討木荷苗木在不同二氧化碳濃度和溫度處理下,其生長及生理
反應之影響。苗木生長於開放式玻璃生長箱,施以375±15,720±30 ppm
二氧化碳濃度和25/22℃,30/25℃之日/夜溫度等4種處理。共處理6個月
。由苗高淨生長變化,發現高二氧化碳濃度處理,雖促進苗木初期生長,
但對後期生長則有抑制的現象。高二氧化碳濃度和高溫對苗木葉片數目、
葉面積、和乾物重均有增加的現象。至於各部分乾物量分配情形,二個月
後各處理間沒有顯著差異,但六個月後,高溫處理下比葉面積、葉面積比
減少,根莖比則增加。在生理反應方面,同一測定條件下測得生長於高二
氧化碳濃度之苗木其光合作用速率有減低的現象,而高溫則促進光合速率
。至於其他生理反應如葉片導度、蒸散作用及呼吸作用等則無顯著差異。
在光合作用特性方面,均以高二氧化碳處理者有較低的反應曲線。顯示生
長於高二氧化碳濃度下,光合作用能力有減低的現象。高溫雖有助於光合
作用速率的增加,但處於高二氧化碳濃度和高溫環境下,反應曲線則未高
於生長於大氣二氧化碳和常溫者。至於葉片外部形態觀察結果顯示,高二
氧化碳濃度生長下會增加葉片厚度及海綿組織厚度,但溫度對其則無影響
。而對氣孔密度之觀察,高溫增加氣孔密度,而二氧化碳濃度對其則無影
響。
The purposes of this study were to investigate the effects of
CO2 and temperature on the growth and physiological responses
of Chinese-Guger Tree(Schima superba Gard. et champ. var.
superba) Seedlings. Seedlings grewn in open-top chamber, were
treated with two different CO2 concentration (375±15ppm,
720±30ppm)and two day/night temperature(25/22℃, 30/25℃)
for six months. Seedling net high growth was enhanced under
treated early few months, however, seedling growth was
inhibited following continuous treated. The leaf number, total
leaf area ,and dry mather of seedlings growing in elevated CO2
and higher temperature conditions were higher than those grew
in normal CO2 concentration and lower temperature. There were
no significance difference of the partitions of dry mather
among seedlings growing in different condition. The specific
leaf area and leaf area ratio decreased, but root/shoot ratios
increased under higher temperature treatment. The responses of
physiological phenomenons(ie. photsynthesis, leaf conductance
and respiration)in the same measurement condition shows that
elevated CO2 concentration inhibited photosynthesis rate, but
hight temperature had enhance effects, and for others leaf
conductance, transpiration and respiration reactions, there
were no significance differences. The photosynthetic
characteristics exhibits that elevated CO2 had lower response
curve. It is showed that photosynthetic capacity of plants
grown in elevated CO2 is decrese. Higher temperature was
attribute to enhance photosynthesis rate, but the response
creve of seedlings grown in elevated CO2 and hight temperature
was not higher than grown in ambient CO2 and normal
temperature. After observing the morphology of leaves, it
showed elevated CO2 increases the thickness of leaves and
spongy parenchyma, but no effect with temperature. But
observing the stomatal densities, higher temperture increased
stomatal densities,CO2 was no effect.
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