留桩高度对芳樟矮林萌芽特性及得油率的影响  

Effects of the Stump Height on the Sprouting Properties and Oil Rate of Cinnamomum camphora ct.Linalool Dwarf Plantations

作　　者：姜睿 张北红[1] 李凤[1] 金志农[1] 彭艺 徐涛[1] 肖祖飞 JIANG Rui;ZHANG Beihong;LI Feng;JIN Zhinong;PENG Yi;XU Tao;XIAO Zufei(Nanchang Institute of Technology,Jiangxi Porvincial Engineering Reseach Center of Seed-breeding and Utilization of Camphor Trees,Nanchang 330099,Jiangxi,China)

机构地区：[1]南昌工程学院江西省樟树繁育与开发利用工程研究中心,江西南昌330099

出　　处：《安徽林业科技》2021年第6期13-18,共6页Anhui Forestry Science and Technology

基　　金：江西省林业局林业科技创新专项(编号:创新专项[2019]04号);江西省科学技术厅重点研发计划项目(编号:20192BBFL60012);江西省林业局樟树研究专项(编号:创新专项[2020]07);江西省科学技术厅重大科技研发专项(编号:20203ABC28W016)。

摘　　要：本文以4年生芳樟矮林为材料,研究留桩高度(5 cm、10 cm、15 cm、20 cm和30 cm)对芳樟矮林萌芽特性及得油率的影响。结果表明,留桩高度对芳樟矮林的萌芽特性有显著影响。留桩高度为20 cm时,芳樟矮林萌芽数和成枝数最多;留桩高度为15 cm时,萌条长度最大,地径最大;留桩高度5 cm,株高和冠幅最小。留桩高度对单株鲜重、单株叶片鲜重、单株小枝鲜重和单株主枝鲜重有显著影响,随留桩高度的增加而先增后降。其中留桩高度为20 cm时,单株鲜重、单株叶片鲜重、单株小枝鲜重和单株主枝鲜重最大。芳樟矮林叶片得油率随留桩高度的增加而降低,留桩高度对小枝和主枝的得油率影响不明显,叶片得油率显著高于小枝和主枝;叶片油细胞数量随着留桩高度的增加呈现先增加后减少趋势,叶片油细胞大小随着留桩高度的增加而增加。因此,芳樟矮林栽培适宜留桩高度为20 cm,此时获得生物量最大,单位面积精油产量最高。In this paper, 4-year-old Cinnamomum camphora ct. Linalool dwarf plantations were the test materials and a study was made on the effects of the stump height(5 cm, 10 cm, 15 cm, 20 cm and 30 cm) on the sprouting properties and oil rate of the plantations. The results showed that the stump height had significant effects on the sprouting properties, with the most sprouts and most grown branches at the stump height of 20 cm, the longest sprouts and biggest basal diameter at the stump height of 15 cm, the shortest tree height and smallest crown breadth at the stump height of 5 cm. The stump height had significant effects on the fresh weight of the single plant, the fresh weight of leaves on the single plant and the fresh weight of small branches and that of the main branches of the single plant. When the stump height was 20 cm, the fresh weight of the single plant, the fresh weight of leaves on the single plant and the fresh weight of small branches and that of the main branches of the single plant were all the biggest. The oil rate of the leaves decreased with the increase of the stump height;the stump height had no significant effects on the oil rate of the small branches and main branches, and the oil rate of the leaves was significantly higher than those of the small and main branches;with the increase of the stump height, the number of the leaf oil cells first increased and then decreased while the size of the leaf oil cells increased. Therefore, the optimum stump height of C. camphora ct. linalool dwarf plantations should be 20 cm, which could produce the largest biomass and highest oil rate per unit area.

关 键 词：芳樟矮林 留桩高度 萌芽特性 生物量 得油率 

分 类 号：S792.23[农业科学—林木遗传育种]