[1]杨金恒,樊恒文,周海燕,等.两种固沙蒿属植物在原产地和引种地适应机制的比较研究[J].西北林学院学报,2008,23(04):83.
 YANG Jin heng,FAN Heng wen,ZHOU Hai yan*,et al.Adaptive Mechanisms of Two Artemisia Species in Native Habitats and Introduced Area[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2008,23(04):83.
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两种固沙蒿属植物在原产地和引种地适应机制的比较研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第23卷
期数:
2008年04期
页码:
83
栏目:
林木遗传育种
出版日期:
2008-07-30

文章信息/Info

Title:
Adaptive Mechanisms of Two Artemisia Species in Native Habitats and Introduced Area
作者:
杨金恒 樊恒文周海燕
1.国家林业局三北防护林建设局,银川 750001;2.中国科学院 寒区旱区环境与工程研究所沙坡头站,兰州 730000
Author(s):
YANG Jinheng1FAN Hengwen2ZHOU Haiyan2* SONG Weimin2
1.Three North Shelterbelt Construction Bureau of SFA, Yinchuan, Ningxia 750001, China; 2. Shapotou Station of Desert Experimental Research, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou, Gansu 730000, China
关键词:
固沙林油蒿差不嘎蒿引种适应机制
Keywords:
sand fixation forestArtemisia ordosica Artemisia halodendron introduced plant adaptive mechanism
分类号:
S722.7
文献标志码:
A
摘要:
油蒿和差不嘎蒿在原产地和引种地的生理特性及其与环境因子关系的比较研究显示:油蒿在不同的自然分布区,生理生态学特性有明显不同;在自然条件较好的沙地,会表现出旺盛的生命活动,但不利于植物对水分的有效利用;严酷的环境条件利于植物内部调节机制的启动,利用有限的环境资源,保证其自身的生存。差不嘎蒿引种后光合速率和蒸腾速率明显降低,一方面是由于引种地环境条件的严酷,另一方面是因为引种后植物内部生理因子之间的相互关系及调节程度都发生了变化;引种后的差不嘎蒿尽管可以通过一定的适应性调节使水分利用效率维持在较高水平并维持了生存,但如果遇到连续的干旱年份,则可能会因体内生理过程的紊乱而导致死亡
Abstract:
In order to understand the differences in physiological characteristics as well as their relationship with environmental factors, a comparative study was conducted on Artemisia ordosica and A. halodendron in their native habitats and introduced area. The results showed that A.ordosica in different natural distribution regions had significant differences in ecophysiological characteristics. It grew better in advantaged habitat of sand land but the efficiency of water use was low. Adverse environmental conditions were conducive to the activation of modulation mechanisms, resulting the effective using of limited environmental resources for plant survival. A. halodendron showed a decrease in photosynthetic rate and transpiration rate in the introduced area, which was not only related to the adverse environmental conditions, but also the changes of interaction of physiological factors and degree of regulation of introduced plants. A. halodendron could survive by maintain a higher level of water utilization efficiency by means of adaptability regulations, while, if subjected to a consecutive years of drought, A. halodendron would die because of in vivo physiological disorder.

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备注/Memo

备注/Memo:
收稿日期:20080129修回日期:20080409 基金项目: 中国科学院资环领域野外台站研究基金(2005411);国家自然科学基金(30740051);国家科技支撑(2007BAD54B05)。作者简介:杨金恒,男,高级工程师,主要从事防沙治沙及工程管理工作。Email:sanbeiju@163.com,dizhi *通讯作者:周海燕。Email:zhouhy@lzb.ac.cn
更新日期/Last Update: 2008-07-30