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干热河谷引种沙漠葳的抗旱生理特征
引用本文:孙永玉,陈艳彬,张春华,罗长维,李昆.干热河谷引种沙漠葳的抗旱生理特征[J].南京林业大学学报(自然科学版),2009,33(6).
作者姓名:孙永玉  陈艳彬  张春华  罗长维  李昆
作者单位:1. 中国林业科学研究院资源昆虫研究所,云南,昆明,650224;国家林业局元谋荒漠生态定位站,云南,元谋,651302
2. 四川省攀枝花市国有林场,四川,攀枝花,617007
3. 中国林业科学研究院资源昆虫研究所,云南,昆明,650224
基金项目:国家"十一五"科技支撑计划 
摘    要:以引种于干热河谷典型地区元谋的沙漠葳(Chilopsis linearis)为研究对象,测定其旱季水势、叶片保水能力、净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Cond)、胞间CO2浓度(Ci)等生理指标的日动态变化。结果表明:在干旱胁迫下,沙漠葳植株通过降低水势以有效地从土壤中吸取水分;沙漠葳叶片失水曲线总体平缓,水分保持能力强;其光合日进程曲线为双峰曲线,在一天中温度、光照和水分条件恶劣的14:00左右仍具有一定的光合能力。耐旱生理研究与田间生长观察表明,沙漠葳可适应干热河谷的恶劣气候并能正常生长。

关 键 词:沙漠葳  引种  干热河谷  抗旱生理

Physiological characteristics for drought resistant Chilopsis linearis, an introduction tree to dry-hot valley
SUN Yong-yu,CHEN Yan-bin,ZHANG Chun-hua,LUO Chang-wei,LI Kun.Physiological characteristics for drought resistant Chilopsis linearis, an introduction tree to dry-hot valley[J].Journal of Nanjing Forestry University(Natural Sciences ),2009,33(6).
Authors:SUN Yong-yu  CHEN Yan-bin  ZHANG Chun-hua  LUO Chang-wei  LI Kun
Institution:1.Research Institute of Resource Insects, CAF, Kunming 650224, China; 2.SFA’s Yuanmou Degraded Ecosystem Location Research Station, Yuanmou 651302, China; 3.Panzhihua State Forest Farms, Panzhihua 617007, China
Abstract:Study on daily changes in physiological characteristics Chilopsis linearis, a introduction tree to dry-hot valley.The testing index included water potential, de-tached leaves dehydration change, photosynthesis rate,stomata conduct-ance, leaf transpiration rate and intercellular CO_2 concentration. The results showed that Ch. linearis reduced water po-tential to availably absorb water from soil under drought stress , de-tached leaves dehydration was slow and water keeping ability was better. Ch. linearis photosynthesis daily progress was a double peak curve, it maintained low photosynthesis at 14:00 when the temperature, sunlight and soil water were all bad. The results of physiological characteristics and field growing showed that Ch. linearis adapted adverse weather of dry-hot valley and grew normally.
Keywords:Chilopsis linearis  introduction  dry-hot valley  drought resisting physiological characteristics
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