| 孑遗植物四合木(Tetraena mongolica)异地保护条件下的气候生物学特征与光合效率 |
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| 引用本文： | 智颖飙,杨持,李红丽,张荷亮,华宇鹏,赵凯,路战远,红鸽,旺扎拉,王强.孑遗植物四合木(Tetraena mongolica)异地保护条件下的气候生物学特征与光合效率[J].中国沙漠,2014,34(1):88-97. |
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| 作者姓名： | 智颖飙 杨持 李红丽 张荷亮 华宇鹏 赵凯 路战远 红鸽 旺扎拉 王强 |
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| 作者单位： | 1. 内蒙古大学 环境与资源学院, 内蒙古 呼和浩特 010021;2. 内蒙古大学 鄂尔多斯学院, 内蒙古 鄂尔多斯 017000;3. 内蒙古大学 生命科学学院, 内蒙古 呼和浩特 010021;4. 北京林业大学 自然保护区学院, 北京 100872;5. 南京师范大学 地理科学学院, 江苏 南京 210023;6. 内蒙古农牧业科学院, 内蒙古 呼和浩特 010031;7. 西鄂尔多斯国家级自然保护区管理局, 内蒙古 乌海 016000 |
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| 基金项目： | 内蒙古自然科学基金项目(2011MS0501);内蒙古科技创新引导基金项目(20121604);内蒙古产业创新人才团队基金项目(20120341);内蒙古人才开发基金项目(2011RC1228);国家自然科学基金项目(30160020)资助 |
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| 摘 要： | 为了廓清异地保护条件下孑遗濒危植物四合木(Tetraena mongolica)的气候生物学特征、光合生理生态适应性及生境适宜性,应用1971—2011年的地面气象资料进行了不同试验区的气候生物图解与分析,测定了四合木及其伴生种白刺(Nitraria tangutorum)的叶片气体交换参数及光合效率。结果表明:①四合木自然分布区(内蒙古乌海地区)与异地保护区的气候生物学特征存在明显分异;②当年种植的四合木实生苗的生长量大小依次为:乌海四合木核心区实生苗鄂尔多斯实生苗阿拉善实生苗;③自然条件下,5个处理的净光合速率(Pn)依次为阿拉善移植的四合木成株(24.05±1.68μmol·m-2·s-1)乌海客土栽培的四合木(19.97±1.05μmol·m-2·s-1)乌海栽培的四合木实生苗(18.96±1.04μmol·m-2·s-1)鄂尔多斯栽培的四合木实生苗(16.64±0.92μmol·m-2·s-1)阿拉善栽培的四合木实生苗(16.48±0.13μmol·m-2·s-1);异地保护试验区栽培的四合木实生苗的Pn没有明显差异(p≥0.05),即原生境条件下栽培的四合木实生苗的Pn较高。同时,异地保护栽培四合木实生苗中,鄂尔多斯栽培的四合木实生苗的Pn阿拉善栽培的四合木实生苗。从四合木光合作用特征中的Pn、蒸腾速率、气孔导度和胞间CO2浓度、气候生物学特征和生长量等综合研究结果可以推断,从原生境区东移的实生苗迁地保护,使四合木具有更高的生理生态适宜性和环境适应性。
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| 关 键 词： | 四合木(Tetraena mongolica) 孑遗植物 光合效率 气候生物学 异地保护 |
| 收稿时间： | 2013-02-20; |
The Bioclimatology and Photosynthetic Characteristics for the ex-situ Conservation of the Endemic Relict Shrub Tetraena mongolica |
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| Zhi Yingbiao,Yang Chi,Li Hongli,Zhang Heliang,Hua Yupeng,Zhao Kai,Lu Zhanyuan,Hong Ge,Wang Zala,Wang Qiang.The Bioclimatology and Photosynthetic Characteristics for the ex-situ Conservation of the Endemic Relict Shrub Tetraena mongolica[J].Journal of Desert Research,2014,34(1):88-97. |
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| Authors: | Zhi Yingbiao Yang Chi Li Hongli Zhang Heliang Hua Yupeng Zhao Kai Lu Zhanyuan Hong Ge Wang Zala Wang Qiang |
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| Abstract: | In order to clarify the bioclimatology characteristics, the photosynthesis physiological and ecological adaptability and the habitat suitability of endangered relict plant Tetraena Mongolica under the ex-situ conservation, bioclimatology in various experimental zones is illustrated and analyzed by applying ground meteorological data from 1971 to 2011. Meanwhile, leaf gas exchange parameters and photosynthetic efficiency of T. Mongolica and Nitraria tangutorum are measured by means of LI-6400 photosynthesis system. The results showed that: (1) there exist obvious differences in the bioclimatology characteristics between the natural distribution area (Wuhai, Inner Mongolia) of T. Mongolica and the ex-situ conservation zones; (2) then planted T. Mongolica seedling growth followed the order of Wuhai T. Mongolica core area seedlings>the Ordos's T. Mongolica seedlings>Alxa T. Mongolica seedlings; (3) Under natural conditions, five processed photosynthetic rates follow the pattern of Alax's transplanted T. Mongolica seedings (24.05±1.68 μmol·m-2·s-1)>Wuhai's exotic soil cultivation T.Mongolica (19.97±1.05 μmol·m-2·s-1)>Wuhai's T.Mongolica cultivated seedlings (18.96±1.04 μmol·m-2·s-1)>Ordos's T.Mongolica cultivated seedlings (16.64±0.92 μmol·m-2·s-1)>Alax's T. Mongolica seedling cultivation(16.48±0.13 μmol·m-2·s-1), however, there are no significant difference to the photosynthetic rate of the T.Mongolica culticated in tested areas of the ex-situ conservation(p≥0.05). That is to say, under in-situ conditions, the photosynthetic rate of cultivated T.Mongolica seedlings is higher. Meanwhile, among the cultivated T.Mongolica seedlings in ex-situ conservation, photosynthetic rate of Ordos's cultivated T.Mongolica seedlings is higher than Alax's cultivated T.Mongolica seedling. Drawing from photosynthetic characteristics of T.Mongolica just where photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration, and the comprehensive study results of the bioclimatology characteristics and the growth peculiarities, it can be inferred that T.Mongolica in-situ distribution moves eastward to ex-situ conservation seedlings, which in fact has a higher physiological and ecological suitability and environmental adaptability. |
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| Keywords: | Tetraena mongolica" target="_blank">Tetraena mongolica')" href="#">Tetraena mongolica relict species photosynthetic efficiency bioclimatology ex-situ conservation" target="_blank">ex-situ conservation')" href="#">ex-situ conservation |
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