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| CO_2增加对榆树·江孜沙棘光合特性的影响 | |
| 引用本文： | 王贞红,张昆林,赵垦田,郭其强.CO_2增加对榆树·江孜沙棘光合特性的影响[J].安徽农业科学,2011,39(30):18661-18662,18677. |
| 作者姓名： | 王贞红 张昆林 赵垦田 郭其强 |
| 作者单位： | 1. 西藏农牧学院资环学院,西藏林芝,860000 2. 西藏农牧学院教务处,西藏林芝,860000 3. 西藏农牧学院生态所,西藏林芝,860000 |
| 基金项目： | 国家科技攻关计划项目(2007BAC06B02); 西藏农牧学院创新团队建设项目(2010) |
| 摘 要： | 目的]研究CO2增加对榆树、江孜沙棘光合特性的影响。方法]利用Li-6400型便携式光合测定系统研究拉萨半干旱河谷地区主要造林树种榆树、江孜沙棘在不同CO2浓度下的光合特性。结果]在弱光下榆树净光合速率较低,而强光下较高;随着CO2浓度增加,榆树的水分利用效率大幅增加。江孜沙棘对CO2浓度升高具有较好的适应性,使江孜沙棘同化CO2的能力和对光能利用效率提高,但当CO2浓度超过600μmol/mol时,其光合作用稍有下降。CO2浓度升高后提高了江孜沙棘对水分的利用效率。结论]榆树和江孜沙棘具有喜光和抗旱性较强的特性,适宜在半干旱地区栽培。 |
| 关 键 词： | CO2增加 榆树 江孜沙棘 净光合速率 水分利用效率 |
Effect of Different CO_2 Concentrations on Photosynthetic Physiological Characteristics of Ulmus pumila and Hippophea rhamnoides |
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| WANG Zhen-hong et al.Effect of Different CO_2 Concentrations on Photosynthetic Physiological Characteristics of Ulmus pumila and Hippophea rhamnoides[J].Journal of Anhui Agricultural Sciences,2011,39(30):18661-18662,18677. | |
| Authors: | WANG Zhen-hong |
| Institution: | WANG Zhen-hong et al(Agricultural and Animal Husbandry College,Linzhi,Tibet 860000) |
| Abstract: | Objective] The aim was to study effect of different CO2 concentrations on photosynthetic physiological characteristics of Ulmus pumila and Hippophea rhamnoides Method]The photosynthesis characteristics of Ulmus pumila and Hippophea rhamnoides were studied in semi-arid valleys areas fo Lasa,Tibet,with the by portable photosynthesis system Li-6400.Result]The results showed that the net photosynthesis rate(Pn) of U.pumila was lower in low light quantum,but Pn was the higher in a great light.As the increasin... |
| Keywords: | CO2concentration improvemant Ulmus pumila Hippophea rhamnoides Netphotosynthetic rate Water use efficiency |
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