桉树纸浆用材林树冠枝生长规律初步研究.pdfVIP

第32 卷 第2 期 桉树科技 Vol.32 No.2 2015 年6 月 EUCALYPT SCIENCE TECHNOLOGY Jun.2015 桉树纸浆用材林树冠枝生长规律初步研究 1 2 1 1* 1 1 张水花 ，刘丽婷 ，朱英娟 ，莫晓勇 ，张祥宇 ，郑 家 (1.华南农业大学林学院，广东 广州 510642 ；2.江西林业科学院，江西 南昌 330032) 摘要：以雷州林业局纪家林场1 ~ 5 年生的华桉1 号、DH32-29 无性系为研究对象，从一级枝数量长度直径、二级 枝数量长度直径等方面研究其枝生长规律，结果表明：华桉1 号一级枝、二级枝各特征指标值及树冠小于DH32-29 ， 华桉 1 号枝条的柔韧性强于DH32-29 ，表明树冠结构与林木的抗风性有关，华桉1 号比DH32-29 抗风性强，在林业 实践中已得到验证；两个无性系一级枝、二级枝结构因子之间的相关性呈现规律均基本一致，华桉1 号一级枝、 二级枝各结构因子之间的相关度低于DH32-29 。本研究可为桉树合理栽植密度的确定、空间结构优化及可持续经营 提供参考和依据。 关键词：桉树无性系；树冠；一级枝；二级枝 中图分类号：S758.5+2 文献标识码：A Branch Growth in Eucalyptus Pulp Plantations 1 2 1 1 1 ZHANG Shui-hua , LIU Li-ting , ZHU Ying-juan , MO Xiao-yong , ZHANG Xiang-yu , ZHENG Jia1 (1. College of Forestry, South China Agriculture University, Guangzhou 510642, Guangdong, China; 2. Jiangxi Academy of Forestry, Nanchang 330032, Jiangxi , China) Abstract : This paper examines branch growth from ages 1 to 5 years of Eucalyptus clones ‘huaan 1 ’ and DH32-29 at Jijia Forest Farm on the Leizhou Peninsula. Traits examined included numbers, lengths and diameters of both primary and secondary branches. It was concluded that: characteristic indices of primary and secondary branches of clone ‘huaan 1 ’ were less than the equivalent indices of clone DH32-29 . The crown of Eucalyptus clone ‘huaan 1 ’ was smaller than that of clone DH32-29, and branch flexibility of clone ‘huaan 1 ’ was higher than clone DH