摘要
以大花序桉为试验对象,研究不同修枝强度(不修枝、轻度修枝、中度修枝和重度修枝)对其生长和光合特性的影响。结果表明,除重度修枝树高显著小于其他处理外,修枝强度对其胸径、树高和单株材积均无显著影响,呈生长量随修枝强度的增加而下降的趋势。净光合速率在不修枝、中度修枝和重度修枝间差异不显著,但显著小于轻度修枝。轻度修枝下水分利用效率最高,中度修枝其次,不修枝的最小。综合考虑生长量、净光合速率和水分利用率等因素,修枝强度介于轻度和中度之间为较好的大花序桉无节材培育修枝强度。
The aim of this paper is to estimate effects of different pruning intensity treatments which including no pruning, light pruning, moderate pruning and heavy pruningon growth and photosynthetic physiology of E. cloeziana. The results showed that pruning intensities except heavy pruning had no significant impact on diameter at breast height, tree height and single volume, and growth went down as pruning increased. There was no significant differences among no pruning, moderate pruning and heavy pruning in terms of net photosynthetic rate, however, net photosynthetic rate of these three treatments was smaller than moderate pruning. As for water use efficiency, light pruning was the highest, the second was moderate pruning, and the last was no pruning. On the whole, the pruning intensity between light pruning and moderate pruning would be a better method than others when growth, net photosynthetic physiology and water use efficiency were all involved in cultivation of clear wood.
出处
《热带作物学报》
CSCD
北大核心
2017年第2期264-268,共5页
Chinese Journal of Tropical Crops
基金
广西优良用材林资源培育重点实验室自主课题(No.14-A-01-01)
广西林业科技项目(No.桂林科字[2014]第35号)
关键词
大花序桉
修枝
生长
光合特性
E.cloeziana
pruning
growth
photosynthetic characteristics
