首页|季节雨林云南玉蕊幼树光合光响应的季节动态（英文）

季节雨林云南玉蕊幼树光合光响应的季节动态（英文）

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  • NETL
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[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。
Seasonal Dynamics of Photosynthetic Response for Young Tree of B. macrostachya in Seasonal Rain Forest
[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.

Seasonal forestBarringtonia macrostachya (B. macrostachya)Photosynthetic characteristicsXishuangbanna

栗忠飞、郑征

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西南林业大学环境科学与工程学院,云南昆明650224 中国科学院西双版纳热带植物园昆明分部,云南昆明650223

中国科学院西双版纳热带植物园昆明分部,云南昆明650223

季节雨林 云南玉蕊 光合特性 西双版纳

Yunnan Scientific and Planned ProjectScientific and Planned Project of Yunnan Educational DepartmentKey Subject Construction Project of Southwest Forestry University国家自然科学基金

2009ZC084M08C0093XKX20090230170168

2012

农业科学与技术(英文版)
湖南省农业科学院

农业科学与技术(英文版)

影响因子：0.222
ISSN：1009-4229
年,卷(期)：2012.13(6)
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