| 粤西乡土香根草光合生理生态特征日动态分析 |
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| 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 |
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| 作者姓名： | 林保花 刘金祥 肖生鸿 杨允菲 |
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| 作者单位： | 1.湛江师范学院热带草业科学研究所， 湛江 524048；;2.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；;3.广东药学院， 广州 510006 |
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| 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 |
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| 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.
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| 关 键 词： | 地膜覆盖 春小麦 土壤温度 土壤水分 产量 半干旱地区 |
| 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]. The journal of applied ecology, 2006, 17(11): 2041-2045 |
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| Authors: | LIN Baohua LIU Jinxiang XIAO Shenghong YANG Yunfei |
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| Affiliation: | 1.Institute of Tropical Patacultural Science, Zhanjiang Normal University, Zhanjiang 524048, China;2.Key Laboratory of Vegetation Ecology of Education Ministry, Institute of Grassland Science, ;Northeast Normal University, Changchun 130024, China；;3.Guangdong Pharmaceutical University, Guangdong 510006, China |
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| 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. |
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| Keywords: | Native Vetiveria zizanioides Photosynthesis Transpiration /ate Stomatal conductance Photosynthetic parameters Environmental factor Correlation. |
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