【摘要】 以乡土树种兴安杜鹃作为对照,对迎红杜鹃物候及生长节律进行了试验研究,结果表明:有效积温达到324~631℃时这2种杜鹃正值开花时节,兴安杜鹃的花期要比迎红杜鹃长1周;当有效积温达到529℃时这2种杜鹃开始进入营养生长阶段。不同光照条件对迎红杜鹃和兴安杜鹃生长量影响显著,2种杜鹃在3种不同光照条件下均以半光照的年高生长量最大,迎红杜鹃为20.34 cm,兴安杜鹃为15.38 cm。更多还原

【Abstract】 Taking Rhododendron dauricum( the native tree species) as CK,phenology and growth rhythm of Rhododendron mucronulatum were studied. Result shows that when the effective accumulated temperature reached 324-631 ℃,two Rhododendron are in process of blooming. Florescence of Rhododendron dauricum is one week longer than that of Rhododendron mucronulatum. When the effective temperature reached 529 ℃,both of Rhododendron began to enter the vegetative growth stage. Different lighting conditions affect significantly the growth of Rhododendron mucronulatum and Rhododendron dauricum. The annual height growths with half-light condition of both Rhododendron simsii are the largest under three light conditions: Rhododendron mucronulatum is 20. 34 cm; Rhododendron dauricum is 15. 38 cm.更多还原