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林业科学 ›› 2016, Vol. 52 ›› Issue (1): 48-54.doi: 10.11707/j.1001-7488.20160106

• 论文与研究报告 • 上一篇    下一篇

毛棉杜鹃对不同光照及土壤排水条件的生长及生理响应

白宇清1, 谢利娟2, 王定跃3, 孙延军3   

  1. 1. 北京林业大学草坪研究所 北京 100083;
    2. 深圳职业技术学院应用化学与生物技术学院 深圳 518055;
    3. 深圳市公园管理中心 深圳 518035
  • 收稿日期:2015-09-13 修回日期:2015-10-19 出版日期:2016-01-25 发布日期:2016-02-26
  • 通讯作者: 谢利娟
  • 基金资助:
    深圳市城市管理局科研基金(SZ201201)。

Influences of Different Light Intensities and Soil Water Drainage on Branch Increment and Some Physiological Indexes in Leaves of Rhododendron moulmainense

Bai Yuqing1, Xie Lijuan2, Wang Dingyue3, Sun Yanjun3   

  1. 1. Lawn Research Institute of Beijing Forestry University Beijing 100083;
    2. School of Applied Chemistry and Biotechnology, Shenzhen Polytechnic Shenzhen 518055;
    3. Shenzhen City Park Management Center Shenzhen 518035
  • Received:2015-09-13 Revised:2015-10-19 Online:2016-01-25 Published:2016-02-26

摘要: [目的] 毛棉杜鹃生长与光照和土壤排水条件密切相关,筛选出适宜的光照和排水条件,对于毛棉杜鹃的引种栽培具有重要意义。[方法] 设置不同遮荫水平(0%, 30%,50%,80%)和土壤排水条件(髙垄、平地),测定毛棉杜鹃枝条生长量和叶片部分生理指标,并对枝条生长量和叶片各生理指标进行相关分析。[结果] 在遮荫水平50%高垄处理下,毛棉杜鹃枝条生长量最大,叶片相对含水量、叶绿素含量较高,相对电导率、MDA含量、SOD活性、可溶性糖含量、可溶性蛋白含量最低或较低;全光照平地栽植时,毛棉杜鹃枝条生长量最小,叶片相对含水量、叶绿素含量最低,相对电导率、MDA含量、SOD活性、可溶性糖含量、可溶性蛋白含量最高。总体上,随着遮荫水平的提高和土壤排水条件的增加,枝条生长量和叶片相对含水量、叶绿素含量呈逐渐增加的趋势,其他各项生理指标呈逐渐减少的趋势。相关性分析结果表明,毛棉杜鹃枝条生长总体积量与叶片丙二醛含量、相对电导率、SOD活性呈极显著负相关,说明在胁迫条件下叶片这3项指标的变化与毛棉杜鹃枝条生长紧密相关,可通过这些指标判定毛棉杜鹃对其生境的适应程度。[结论] 毛棉杜鹃适宜在遮荫50%、土壤排水条件好的生境中生长。

关键词: 毛棉杜鹃, 遮荫, 土壤排水条件, 枝条生长量, 生理指标, 相关性分析

Abstract: [Objective] The growth of Rhododendron moulmainense is closely related with light intensity and soil drainage, therefore, selection of appropriate light intensity and soil drainage conditions is of great significance for introduction and cultivation of R. moulmainense. [Method] Different shadings (0%,30%,50%,80%) and different soil drainage measures (High ridge and Flat ridge) were applied in the article. The branch increments and some physiological indexes in leaves of R. moulmainense were measured, and the correlations between branch increment and the physiological indexes were analyzed. [Result] The results showed that under 50% shading and high ridge treatments, the branch increment, and chlorophyll content and RWC in leaves of R. moulmainense were highest. The relative conductivity, contents of MDA, soluble sugar and soluble protein, and SOD activities in the leaves were lower or the lowest. Under 0% shading and flat ridge treatments, the branch increment, and chlorophyll content and RWC in leaves of R. moulmainense were lowest, whereas the relative conductivity, contents of MDA, soluble sugar and soluble protein, and SOD activities were highest. In general, with increasing shading and soil drainage, the branch increment, and chlorophyll content and RWC in leaves had a trend of gradual increase, while the other measured indexes all appeared a trend of gradual decrease. Correlation analysis showed that there was an extremely significant negative correlation between the branch increment with SOD activity, relative conductivity and MDA content, indicating that the branch increment of R. moulmainense was closely related to the changes of these three indexes in stress environment. Thus, the adaptation degree of R. moulmainense to habitat can be determined by means of above three indexes. [Conclution] According to these experiment results, it is speculated that R. moulmainense would be suitable for growing in the habitat with 50% shading and good drainage soil.

Key words: Rhododendron moulmainense, shading, soil water drainage, branch increment, physiological index, correlation analysis

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