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中国沙漠 ›› 2001, Vol. 21 ›› Issue (3): 227-231.

• 研究论文 • 上一篇    下一篇

脆弱生态带典型区域几种锦鸡儿属优势灌木的光合特征

周海燕1, 张景光1, 龙利群1, 赵亮2   

  1. 1. 中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 甘肃兰州 730000;
    2. 兰州大学干旱农业生态国家重点实验室, 甘肃兰州 730000
  • 收稿日期:2000-12-15 修回日期:2001-02-13 出版日期:2001-09-20 发布日期:2001-09-20
  • 作者简介:周海燕(1963-),女(汉族),内蒙古赤峰市人,理学硕士,副研究员,主要从事干旱区植物生理生态研究。
  • 基金资助:
    国家重点基础研究发展规划项目(G2000048704);中科院寒区旱区环境与工程研究所知识创新工程项目(CACX210031)资助

Photosynthesis of Several Dominant Shrubs of Genus Caragna L. in Ecotone

ZHOU Hai-yan1, ZHANG Jing-guang1, LONG Li-qun1, ZHAO Liang2   

  1. 1. Shaptou Desert Research & Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China;
    2. State Key Lab of Arid Agroecolgy of Lanzhou University, Lanzhou 730000, China
  • Received:2000-12-15 Revised:2001-02-13 Online:2001-09-20 Published:2001-09-20

摘要: 小叶锦鸡儿在原产地科尔沁沙地光合速率可达12.21μmol·m-2·s-1,引种至腾格里沙漠后降低了11.63倍,光合日变化曲线由"凹谷"型变为"单峰"型;毛乌素沙地中间锦鸡儿的光合速率在引种前为4.5μmol·m-2·s-1,引种后降低了3倍,光合日变化曲线由"双峰"型变为"单峰"型;在相同的环境条件下,柠条和中间锦鸡儿光合等特性相似,以小叶锦鸡儿光合速率最低,引种前后降幅最大,说明其对引种地的适应性不及中间锦鸡儿。

关键词: 脆弱生态带, 小叶锦鸡儿, 中间锦鸡儿, 柠条, 光合特征

Abstract: The photosynthesis rate of Caragana microphylla decreases by 11.63 times after it have been introduced to Tengger desert from its original area Horqin Sand y Land, where it is 11.21 μmol·m-2·s-1, and its photosynthesis diurnal curve changes from concave fashion to single-peak. The photosynthetic rate of C. intermedia is 4.5 μmol·m-2·s-1 when it grows in Mu Us sandy land, but decreases by three time after being introduced, and its photosynthesis diurnal curve changes from t wo-peak to single-peak. In the same environment condition, the photosynthesis features of C. korshinskii and C. intermedia are similar. The photosynthetic rate of C. microphylla is the lowest and decreases most after being introduced, which shows that its adaptability to introduced area is less than C. intermedia.

Key words: Ecotone, Caragana microphylla, C. Intermedia, C. Korshinskii, photosynthesis

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