林业科学2016，Vol.52Issue(1)：48-54,7.DOI:10.11707/j.1001-7488.20160106
毛棉杜鹃对不同光照及土壤排水条件的生长及生理响应
Influences of Different Light Intensities and Soil Water Drainage on Branch Increment and Some Physiological Indexes in Leaves of Rhododendron moulmainense
摘要
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.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Key words
Rhododendron moulmainense/shading/soil water drainage/branch increment/physiological index/correlation analysis分类
农业科技引用本文复制引用
白宇清,谢利娟,王定跃,孙延军..毛棉杜鹃对不同光照及土壤排水条件的生长及生理响应[J].林业科学,2016,52(1):48-54,7.基金项目
深圳市城市管理局科研基金(SZ201201). （SZ201201）
