栽植密度对沙枣幼苗生长的影响  

Effects of planting density on seedling growth of Elaeagnus angustifolia

作　　者：王利军[1] 陈海霞 马履一[1] 彭祚登[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083 [2]北京市密云县五座楼林场

出　　处：《林业科技开发》2010年第4期109-113,共5页China Forestry Science and Technology

基　　金：高等学校科技创新工程重大项目培育资金(编号:708007);国家"十一五"科技支撑计划专题"刺槐等能源林培育技术"(编号:2006BAD18B0103)

摘　　要：研究了不同栽植密度对沙枣幼苗的苗高、地径以及生物量的影响。结果表明,5种栽植密度下,沙枣幼苗的苗高生长量、地径生长量的积累在不同生长季表现出明显的差别:(1)在栽植密度为1 m×1.5 m时2年生沙枣苗的苗高、地径、生物量积累都高于其他密度,在密度为2 m×2 m时的苗高生长量、地径生长量、生物量最低。(2)不同密度下沙枣苗的含水率依次是1.5 m×2 m>1 m×1.5 m>1.5 m×1.5 m>2 m×2 m>1 m×1 m;根冠比依次是1 m×1 m>1.5 m×1.5 m>2 m×2 m>1 m×1.5 m>1.5 m×2 m。(3)不同密度下各营养器官的分配存在差异。总体而言,单株苗木各营养器官所占百分率的平均值依次为叶>干>根>枝。Field experiments were carried out to investigate the influences of different plant densities on the plant height,ground diameter and biomass of Elaeagnus angustifolia L.seedlings.The results showed that there were significant differences in plant height,ground diameter and biomass between plant densities.The average plant height,ground diameter and biomass were the highest in plant density of 1 m×1.5 m,while they were the lowest in plant density of 2 m×2 m among five plant densities.The water content of E.angustifolia L.seedlings in different densities was in the order of 1.5 m×2 m1 m×1.5 m1.5 m×1.5 m2 m×2 m1 m×1 m,and for the ratio of root to shoot,the order was as 1 m×1 m1.5 m×1.5 m2 m×2 m1 m×1.5 m1.5 m×2 m.The location of various vegetative organs was different with the densities,but generally,the average biomass vegetative organs of a single seedling was in the order of leaf stemrootbranch.

关 键 词：沙枣 密度 苗高 地径 生物量 

分 类 号：S665.1[农业科学—果树学]