文献类型：期刊文献

中文题名：米老排不同高度级苗木形态特征的分析

英文题名：Analysis of the Morphological Characteristics of Height-classified Mytilaria laosensis Seedlings

作者：闫彩霞[1] 杨锦昌[1] 尹光天[1] 李荣生[1] 邹文涛[1]

第一作者：闫彩霞

机构：[1]中国林业科学研究院热带林业研究所

年份：2013

期号：5

起止页码：98-102

中文期刊名：林业资源管理

外文期刊名：Forest Resources Management

收录：北大核心:【北大核心2011】；

基金：广东省林业科技创新项目(2010KJCX001-06;2012KJCX001-05);林业行业专项项目(201204304)

语种：中文

中文关键词：苗高;地径;生物量;高径比;质量指数

外文关键词：seedling height; ground diameter; biomass; ratio of height to diameter; quality index

分类号：S792.99;S718.5

摘要：通过选取50,60,70,80 cm共4种高度级的苗木,研究其形态特征的变化规律以及形态指标间相关性,旨在为米老排苗木质量评价和苗木分级造林提供参考。研究结果表明:地径、叶数和高径比随高度的增加而递增,其中地径和高径比在不同苗高等级间存在极显著差异;植株鲜质量和干质量随高度的增加而显著递增,其变化范围分别为30.32～50.52 g/株和11.26～16.91 g/株,鲜质量在不同器官中的分配规律为根<茎<叶,而干质量总体表现为根<叶<茎;植株含水率随高度级的增大呈递增趋势,各器官的含水率变化规律为根<茎<叶;在不同等级间地上与地下部分干质量比相对稳定;质量指数随高度等级的增大而增加,其值分别为1.018,1.121,1.208和1.239,但不同等级间无显著差异。苗木不同形态指标相互关联,其中苗高、地径、鲜质量和干质量以及质量指数最能反映米老排苗木生长的综合状况,宜作为苗木质量评价和分级的主要指标。
Mytilaria laosensis seedlings of 50,60,70 and 80 cm height classes at 8 months age were selected for analyzing the morphological characteristics and their correlation between morphological indices aimed to provide references for seedling evaluation and grading. Ground diameter and ratio of height to diameter increased with height class significantly（ P 0. 01） while leaf number varied slightly with no significant differences between classes. Fresh plant weight and dry mass also increased with height class significantly（ P 0. 01）,ranging from 30. 32 to 50. 52 g / plant and from 11. 26 to16. 91 g / plant respectively; fresh mass was allocated to different organs with the pattern of root stem leaf while dry mass was done with the pattern of root leaf stem as a whole. Water content of seedlings showed an increasing trend with height class,and the changing pattern of water content in different organs was as root stem leaf. Ratio of dry mass underground to aboveground in different classes was relatively constant. Quality index increased with height class valued as 1. 018,1. 121,1. 208 and 1. 239 respectively for four height classes with no significant differences between them. Morphological indices interrelated with each other,among which seedling height,ground diameter,fresh and dry mass and quality index reflected the comprehensive growth status of M. laosensis seedlings well and should be served as main indicators for evaluating and grading the seedlings.