不同光强对年青蒲桃1年生幼苗生长的影响

Effect of Light Intensity on the Growth of 1-year Old Seedlings of Xanthostemon youngii

以年青蒲桃(Xanthostemon youngii)1年生幼苗为材料,设置3个不同光强处理(分别为自然光的100%、41%和5%),测定幼苗的各项生长指标(包括苗高、地径、冠幅、叶长、宽和叶面积)。结果表明:(1)年青蒲桃1年生幼苗的生长势表现为100%光照>41%光照>5%光照;(2)弱光照(5%光照)条件下叶片尖端及边缘干枯,幼苗长势差。结果表明,年青蒲桃属于中性偏阳树种,引种栽培和园林应用时应种植于光照较强的环境中。

The 1-year old seedlings of Xanthostemon youngii were used for the experiment under different light conditions （100%, 41% and 5% of full light intensity）. The height, basal diameter, crown amplitude, leaf length, leaf width and leaf area were measured, The results showed that： （1） The growth vigor of 1-year old seedlings of Xanthostemon youngii decreased with the decline of light intrnsity; （2） The growth vigor of low light intensity treatment （5% of full light intensity） was poor with the wihed leaves on the tip and margin, The results indicated that Xanthostemon youngii is neutral, but slightly heliophyte, Consequently, Xanthostemon youngii should grow in full light condition in landscape.