| 张习敏， 申 刚， 陈 玲，等.复羽叶栾树光合作用日变化及光响应特征[J].广东农业科学,2015,42(5):109-114 |
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复羽叶栾树光合作用日变化及光响应特征 |
| Diurnal variation of photosynthesis and response to light intensity of Koelreuteria bipinnata |
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| DOI： |
| 中文关键词: 复羽叶栾树 光合日变化 光响应 |
| 英文关键词: Koelreuteria bipinnatan diurnal variation of photosynthesis light response |
| 基金项目: |
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| 摘要点击次数: 1265 |
| 全文下载次数: 650 |
| 中文摘要: |
| 采用 LI-6400 便携式光合测定系统‘测定贵州茅台酒厂生态功能区内复羽叶栾树光合作用日变化
及光响应特征‘并分析光合生理与生态因子之间的关系。 结果表明：复羽叶栾树净光合速率（Pn）、光能利用率
（LUE）的日变化均为单峰曲线‘Pn 和 LUE 的峰值分别出现在 12:00 和 10:00 左右；胞间二氧化碳浓度（Ci）的日
变化与 Pn 相反‘蒸腾速率（Tr）和气孔导度（Cond）的日变化均呈逐渐降低的趋势；Pn、Tr、LUE、Ci 和 Cond 与主
要环境因子光合有效辐射（PAR）、大气温度（Ta）和相对湿度（RH）之间的关系均符合二次曲线的变化规律‘其
中 Pn、Tr 与 PAR、Ta、RH 的相关程度均达极显著水平‘Cond 与 PAR、Ta、RH 的相关程度均达显著水平‘LUE 与
PAR、Ta的相关程度均达极显著水平；PAR 是影响复羽叶栾树 Pn、Tr、Ci 和 Cond 最主要的环境因子‘LUE 主要
受 Ta的影响。 |
| 英文摘要: |
| Diumal changes of photosynthesis and light response curve of Koelreuteria bipinnata were measured
with LI-6400 in ecological function zones of Moutai winery, and the relationship between photosynthetic physiology
and ecological factors were analyzed. The results showed that the net photosynthetic rate (Pn) and light use efficiency
(LUE) of K. bipinnata had the diurnal variation of single peak, which appeared around 12:00 a.m. and 10:00 a.m.
respectively. Intercellular CO2 concentration (Ci) had opposite diurnal variation, compared with Pn. Diurnal variation of
transpiration rate(Tr) and stomatal conductance(Cond) had gradual decrease on the whole day. The relationship among
Pn, Tr, LUE, Ci, Cond and photosynthetical active radiation (PAR), air temperature (Ta), relative humidity (RH) had
characteristics of quadratic curve model. There was a significant correlation between Pn, Tr and PAR, Ta, RH. A
correlation between Cond and PAR, Ta, RH was observed. At the same time, a siginificant correlation between LUE
and PAR, Ta was also observed. PAR was the most sensitive enrironmental factor to Pn, Tr, Ci and Cond of K.
bipinnata and LUE was mainly effected by Ta. |
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