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| 粤西乡土香根草光合生理生态特征日动态分析 | |
| 引用本文： | 林保花,刘金祥,肖生鸿,杨允菲.粤西乡土香根草光合生理生态特征日动态分析[J].应用生态学报,2006,17(11):2041-2045. |
| 作者姓名： | 林保花 刘金祥 肖生鸿 杨允菲 |
| 作者单位： | 1. 湛江师范学院热带草业科学研究所,湛江,524048;东北师范大学草地科学研究所植被生态科学教育部重点实验室,长春,130024;广东药学院,广州,510006 2. 湛江师范学院热带草业科学研究所,湛江,524048 3. 东北师范大学草地科学研究所植被生态科学教育部重点实验室,长春,130024 |
| 基金项目： | 广东省教育厅千百十工程优秀人才培养基金;广东省湛江市科技攻关项目;湛江师范学院校科研和教改项目;国家自然科学基金 |
| 摘 要： | 在秋季对粤西乡土香根草的光合等生理特性日动态变化进行了测定.结果表明，香根草的净光合速率(Pn)日变化呈双峰型，蒸腾速率(Tr)和气孔导度(Gs)变化趋势与Pn相似，胞间CO2浓度(Ci)变化方向则与其相反.Pn与光合有效辐射(PAR)、Tr与PAR、Ta和大气相对湿度(RH)的相关程度都达到了极显著水平(P＜0.01)，Gs则与空气温度(Ta)相关程度达到了显著水平(P＜0.05).同一环境因子对Pn、Tr和Gs的影响程度不同，其中PAR是影响香根草光合作用最为强烈的环境因子.Tr是受环境因子控制最为显著的生理参数. |
| 关 键 词： | 乡土香根草 光合作用 蒸腾速率 气孔导度 光合参数 环境因子 相关性 |
| 文章编号： | 1001-9332(2006)11-2041-05 |
| 收稿时间： | 2005-09-19 |
| 修稿时间： | 2006-06-15 |
Diurnal change of photosynthetic characteristics of native Vetiveria zizanioides in Western Guangdong |
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| LIN Baohua,LIU Jinxiang,XIAO Shenghong,YANG Yunfei.Diurnal change of photosynthetic characteristics of native Vetiveria zizanioides in Western Guangdong[J].Chinese Journal of Applied Ecology,2006,17(11):2041-2045. | |
| Authors: | LIN Baohua LIU Jinxiang XIAO Shenghong YANG Yunfei |
| Affiliation: | 1 Institute of Tropical Patacuhural Science, Zhanjiang Normal University, Zhanjiang 524048, China; 2 Key Laboratory of Vegetation Ecology of Education Ministry, lastitute of Grassland Science, Northeast Normal University, Changchun 130024, China ; 3 Guangdong Pharmaceutical University, Guangdong 510006, China |
| Abstract: | The determinations on the photosynthetic parameters of native Vetiveria zizanioides in Western Guangdong in autumn showed that the net photosynthetic rate (P_n) of V. zizanioides had a diurnal change with two peaks, transpiration rate (T_r) and stomatal conductance (G_s) were similar with P_n, while intercellular CO_2 concentration (C_i) was in adverse. There was a significant positive correlation between P_n and photosynthetic active radiation (PAR) (P<0.01), T_r and PAR (P<0.01), air temperature (T_a) and relative humidity (RH) (P<0.01), and G_s and T_a (P<0.05). Same environmental factors had different effects on P_n, T_r and G_s, and PAR had most intensive effect on the photosynthesis of V. zizanioides. Among the test photosynthetic parameters, T_r was most sensitive to the environmental factors. |
| Keywords: | Native Vetiveria zizanioides Photosynthesis Transpiration /ate Stomatal conductance Photosynthetic parameters Environmental factor Correlation |
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