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生态学杂志 ›› 2009, Vol. 28 ›› Issue (09): 1763-1766.

• 三北防护林生态工程研究专栏 • 上一篇    下一篇

风沙地菊芋的主要生态学特性

孔涛1,2;吴祥云1**;刘玲玲2;闫晗2   

  1. 1辽宁工程技术大学资源与环境工程学院|辽宁阜新 123000;2辽宁工程技术大学理学院|辽宁阜新 123000
  • 出版日期:2009-09-10 发布日期:2009-09-10

Main ecological characteristics of Jerusalem artichoke (Helianthus tuberosus L.) in aeolian sandy land.

KONG Tao1,2;WU Xiang-yun1;LIU Ling-ling2;YAN Han2   

  1. 1College of Resource and Environment Engineering, Liaoning Technical Univ ersity, Fuxin 123000, Liaoning, China;2College of Science, Liaoning Technical University, Fuxin 123000, Liaonin g, China
  • Online:2009-09-10 Published:2009-09-10

摘要: 菊芋(Helianthus tuberosus L.)根系发达,抗旱性强,具有重要的防风固沙功能。为了揭示菊芋防风固沙机理及生长适应性,对科尔沁沙地生长的菊芋主要生态学特性进行了研究。结果表明:菊芋的生长发育可分为出苗期、快速生长期和块茎膨大期3个时期;菊芋地上部器官生长与干物质积累8周之内增长缓慢,之后生长迅速,第18周块茎开始进入速生期,块茎干物质积累在第23周达到最大值,平均单株为298.15 g;菊芋的光合性能指标与干物质积累存在密切关系,其中菊芋叶面积指数、光合势均在地上部分生长速生期第9周起开始呈对数式增长,到地下块茎膨大速生期第18周达到最大值,分别为6.55、401016 m2·d-1·hm-2;叶片叶绿素相对含量在地上干物质开始向块茎转移时最高,峰值为38.4。

关键词: 光合-蒸散耦合模型, 水热通量, 日变化

Abstract: With developed root system and strong drought-resistance, Jerusalem artichoke (Helianthus tuberosus L.) has an important function in wind prevention and sand fixation. In order to reveal its growth adaptability and its mechanisms of wind prevention and sand fixation, the main ecological characteristics of Jerusalem artichoke in Keerqin sandy land were studied. The growth and development of Jerusalem artichoke could be divided into three stages, i.e., seedling emergence, fast growth, and tuber expanding. The growth and dry matter accumulation of
aboveground organs increased slowly within the first 8 weeks, and rapidly since then. The tuber began to fast grow from the 18th week, and peaked at the 23rd week, with the dry matter accumulation reached 298.15 g per plant. The photosynthesis indices had close relationships with dry matter accumulation. Leaf area index and photosynthetic potential began to have a logarithmic increase from the 9th week (aboveground part fast growth stage), and peaked at the 18th week (subterranean tuber expanding stage), with the value of 6.55 and 401016 m2·d-1·hm-2, respectively. The relative leaf chlorophyll content was the maximum (38.4) when the dry matter in aboveground organs began to transfer into tuber.

Key words: Photosynthesis-evapotranspiration coupled model, Water and heat fluxes, Diurnal variation