摘要
以苗高和地径作为苗木分级的质量指标,对舟山新木姜子一、二年生苗木进行逐步聚类分级,得出一年生苗木分级标准为:Ⅰ级苗苗高≥19.7 cm,地径≥0.38 cm;19.7 cm>Ⅱ级苗苗高≥13.8 cm,0.38 cm>地径≥0.30 cm;Ⅲ级苗苗高<13.8 cm,地径<0.30 cm。二年生苗木:Ⅰ级苗苗高≥49.1 cm,地径≥0.59 cm;49.1 cm>Ⅱ级苗苗高≥29.5 cm,0.59 cm>地径≥0.38 cm;Ⅲ级苗苗高<29.5 cm,地径<0.38 cm。应用分级标准对3种育苗密度的苗木进行分级。并通过不同密度与苗高、地径的方差分析,结果表明,培育一年生舟山新木姜子苗木最适密度为300株/m2,二年生苗木的最适密度为200株/m2。
Gradual cluster analysis on 1-2 year seedling of Neolitsea sericea, taking seedling height and ground diameter as grading indicators resulted that ground diameter and height of the first-grade for 1-year seedling was 0.38cm and 19.7cm, those of the second-grade ones 〉0.30 cm and 13.8cm-19.Tem, and those of the third-grade ones〈0.30cm and 〈13.8cm. Ground diameter and height of the first-grade for 2-year seedling was 0.59cm and 49.1cm, those of the second-grade ones 0.38-0.59cm and 29.5cm-49.1cm, and those of the third-grade ones〈0.3gcm and 〈29.5cm. Analysis of variance on density, seedling height and ground diameter demonstrated that the best density for l-year and 2-year seedlings was 300 and 200 trees per square meter.
出处
《浙江林业科技》
北大核心
2009年第3期80-83,共4页
Journal of Zhejiang Forestry Science and Technology
基金
浙江省舟山市科技计划项目"舟山海岛特色树种产业化开发关键技术研究"(06334)
关键词
舟山新木姜子
苗木分级
逐步聚类
育苗密度
Neolitsea sericea
seedling grading
gradual cluster
seedling cultivation density
