文献类型：期刊文献

中文题名：西南桦轻基质网袋容器苗的质量评价指标

英文题名：Quality Assessment Index of Betula alnoides Seedling Growing in Light Media in Net Container

作者：黎明[1] 曾杰[2] 郭文福[1] 吴光枝[1]

第一作者：黎明

机构：[1]中国林业科学研究院热带林业实验中心;[2]中国林业科学研究院热带林业研究所

年份：2011

卷号：39

期号：6

起止页码：178-180

中文期刊名：贵州农业科学

外文期刊名：Guizhou Agricultural Sciences

收录：CSTPCD;;北大核心:【北大核心2008】；

基金："十一五"国家科技支撑专题"西南桦用材林高效培育技术"(2006BAD24B0902)

语种：中文

中文关键词：西南桦;轻基质容器苗;苗木分级;主成分分析;逐步聚类分析

外文关键词：Betula alnoides; seedling from light media container; seedling grade; principle component analysis; gradual cluster analysis

分类号：S792.15

摘要：为制定西南桦轻基质网袋容器苗的分级标准,为营建高效西南桦人工林奠定基础,采用主成分分析法确定西南桦轻基质容器苗质量评价的主要指标,应用逐步聚类分析研究其分级标准,并通过造林效果试验对分级结果予以验证。结果表明:西南桦苗木可分为3级,Ⅰ级苗:苗高H≥28.5 cm、地径D≥2.0 mm,Ⅱ级苗:28.5 cm>苗高H≥23.9 cm、2.0 mm>地径D≥1.5 mm,Ⅲ级苗:苗高H<23.9 cm、地径D<1.5 mm;造林半年后不同级别苗木的造林效果差异明显,Ⅰ、Ⅱ级苗的造林成活率均在85%以上,两者苗高、地径生长量差异显著(P<0.05),Ⅲ级苗的成活率低于75%,其生长量极显著低于Ⅰ级、Ⅱ级苗(P<0.01)。
Main indexes for quality assessment of Betula alnoides seedlings growing with light media in net container were screened out by principal component analysis,and classification standard of the seedlings was studied by gradual cluster analysis and confirmed the grading results by planting trial to establish the classification standards and build the artificial forest.The results showed that the seedlings could be divided into 3 grades,H≥28.5cm and D≥2.0mm,28.5cmH≥23.9cm and 2.0mmD≥1.5mm,and H23.9cm and D1.5mm belonged to grade 1,2,and 3,respectively.The differences were obvious in the planting trial half a year later,the seedling survival rate of both grade 1 and 2 were all above 85%.There were significant difference（p0.05） in seedling height and stem diameter around ground between grade 1 and 2.For grade 3,the survival rate was less than 75%,and the mass growth was very significantly lower than both seedlings in grade 1 and 2（p0.01）.