不同品种桉树人工林生长特征及持水性能研究  

Growth and Water Holding Capacity of Various Eucalyptus Plantations in Guangxi, China

作　　者：杜阿朋[1] 赵知渊 王志超[1] 陈云峰 吴志华[1] 

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022 [2]广西壮族自治区国有黄冕林场,广西鹿寨545600

出　　处：《热带作物学报》2014年第7期1306-1310,共5页Chinese Journal of Tropical Crops

基　　金：桂科攻"高产优质多抗桉树新品种选育-耐寒桉树良种的胶合板无性系选育技术研究"(No.1123004-3B);林业公益性行业科研专项"桉树生态经营及产业升级关键技术研究"(No.201104003)

摘　　要：以广西10年生的4种桉树人工林为研究对象,对比分析了不同林分的生长特征、林下凋落物和土壤持水特征的变化规律.结果表明：在林分生长特征方面,4种桉树林分平均胸径在13.9～15.5 cm之间变化,柳桉最小,大花序桉最大;树高和冠幅均达到极显著差异（p＜0.01）,粗皮桉最小,大花序桉最大.在凋落物贮量及持水特征上,林下总的凋落物贮量范围是18.7～20.1 t/hm2,排序为：大花序桉（20.1t/hm2）＞邓恩桉（19.6t/hm2）＞粗皮桉（19.1 t/hm2）＞柳桉（18.7t/hm2）;最大持水量在25.9～40.7 t/hm2之间变化,排序为：邓恩桉（40.7 t/hm2）＞大花序桉（32.9 t/hm2）＞柳桉（27.2 t/hm2）＞粗皮桉（25.9t/hm2）.在土壤持水特性方面,4种桉树人工林地的土壤总孔隙度、毛管孔隙度、饱和持水量、毛管持水量和田间持水量均为粗皮桉林地最小,柳桉林地最大.Taking the four types of Eucalyptus plantations in Guangxi as the research object,the forest growth,litterfall and soil water holding capacity were analyzed in order to understand their change rule.The results showed that the stand average DBH was ranged from 13.9 cm to 15.5 cm.The stand average DBH was minimum in E.saligna stand and maximum in E.cloeziane stand.The tree height and canopy were of extremely significant differences （p＜0.01）,being the highest in E.cloeziane stand and the lowest in E.pellita stand.The litterfall storage was in range of 18.7-20.1 t/hm2,decreased in order of E.cloeziane（20.1 t/hm2）＞ E.dunnii（19.6 t/hm2）＞E.pellita （19.1 t/hm2）＞E.saligna（18.7 t/hm2）.The maximum water holding capacity was in range of 25.9-40.7 t/hm2）,decreased in order of E.dunnii （40.7 t/hm2）＞E.cloeziane（32.9t/hm2）＞E.Saligna（27.2 t/hm2）＞E.Pellita（25.9t/hm2）.For the soil water holding capacity roles,the soil total porosity,capillary porosity,saturated moisture content,capillary water capacity and field moisture capacity in E.saligna stand were maximum,but minimum in E.pellita stand.

关 键 词：桉树人工林 生长特征 持水性能 

分 类 号：S152.5[农业科学—土壤学] S792.39[农业科学—农业基础科学]