CAJ | 학술논문

[目的]了解热带季节雨林幼树个体光合光响应的生物学特性,为全球气候变化下热带雨林保护提供科学依据。[方法]在西双版纳热带季节雨林中选择林下云南玉蕊幼树,分别于雾凉季、干热季、雨季,测定其光合光响应特征的季节变化动态。[结果]云南玉蕊幼树林下Pnmax为雨季最大,干热季和雾凉季次之,分别为4.08、2.89和1.81μmol/（m·s）,季节间具显著差异;Gs和Tr以雨季相对最高,WUE以干热季为最高,Ci以雾凉季为最高,它们在人工光源下的最大值分别为0.18mmol/（m2·s）、1.59mmol/（m2·s）、7.35μmol/mmol和455μmol/（m2·s）;Ci随光强及季节的变化与WUE呈相反趋势,而Gs与Tr变化趋势基本一致。[结论]热带季节雨林云南玉蕊幼树林下光合光响应特征有明显季节性,雨季中有比其他季节更为旺盛的光合特征,且幼树具有耐荫的特性。
[목적]료해열대계절우림유수개체광합광향응적생물학특성,위전구기후변화하열대우림보호제공과학의거。[방법]재서쌍판납열대계절우림중선택림하운남옥예유수,분별우무량계、간열계、우계,측정기광합광향응특정적계절변화동태。[결과]운남옥예유수림하Pnmax위우계최대,간열계화무량계차지,분별위4.08、2.89화1.81μmol/（m·s）,계절간구현저차이;Gs화Tr이우계상대최고,WUE이간열계위최고,Ci이무량계위최고,타문재인공광원하적최대치분별위0.18mmol/（m2·s）、1.59mmol/（m2·s）、7.35μmol/mmol화455μmol/（m2·s）;Ci수광강급계절적변화여WUE정상반추세,이Gs여Tr변화추세기본일치。[결론]열대계절우림운남옥예유수림하광합광향응특정유명현계절성,우계중유비기타계절경위왕성적광합특정,차유수구유내음적특성。
[Objective] The aim was to study on biological characteristics of photosynthetic response for young trees of B. macrostachya in seasonal rain forest, providing scientific reference for protection of tropical rain forest under change of global climate. [Method] Young trees of B. macrostachya in Xishuangbanna tropical forest were chosen to research in foggy season, dry and hot season, and rainy season to measure dynamics of season changes. [Result] For young trees of B. macrostachya in Yunnan Province, Pn max was the biggest in rainy season, followed by dry and hot season and foggy season at 4.08, 2.89 and 1.81 μmol/（m·s） respectively; Gs and Tr in rainy season were the highest and WUE in dry season was the highest; Gi achieved peak in foggy season, of which the highest values were 0.18 and 1.59 mmol/（m 2 ·s）, and 7.35 μmol/mmol and 455 mmol/（m 2 ·s）; Ci showed an opposite trend with that of WUE, and Gs and Tr changed similarly. [Conclusion] Young trees of B. macrostachya in seasonal rain forest are of significant seasonal change in photosynthetic response, and young trees are shade tolerant.