摘要
对杉木1a生扦插苗进行随机抽样调查,首先采用主成分因子分析法确定苗木分级指标,接着通过逐步聚类分析法进行修正,最终计算出杉木1a生扦插苗的苗木分级标准。结果如下:确定苗高和地区径为分级指标,标准为Ⅰ级苗:苗高≥49cm,地径≥0.77cm;Ⅱ级苗:49cm>苗高≥41cm,0.77cm>地径≥0.56cm;Ⅲ级苗:苗高<41cm,地径<0.56cm。
A random sampling survey of 1-year-old cutting seedlings of Cunninghamia lanceolata was carried out.The principal component factor analysis method was used to determine the seedling grading indicators,which were seedling height and ground diameter.Then,the grading correction was carried out through the stepwise cluster analysis method,and finally the 1-year-old Cunninghamia lanceolata was calculated.Seedling grading standard for cutting seedlings.The standards are as follows:Grade I seedlings:seedling height≥49 cm,ground diameter≥0.77 cm;Grade II seedlings:seedling height≥41 cm,ground diameter≥0.56 cm;Grade III seedlings:seedling height<41 cm,ground diameter<0.56 cm.
作者
崔子佳
欧斌
韩璐
李远章
CUI Zi-jia;OU Bin;HAN Lu;LI Yuan-zhang(Jiangxi Environmental Engineering Vocational College,Ganzhou,Jiangxi 341000,China;Seedling Research Institute of Jiangxi Environmental Engineering Vocational College,Ganzhou,Jiangxi 341000,China;Ganzhou Senyuan Science and Technology Seed Farm,Anyuan,Jiangxi 342100,China)
出处
《河北林业科技》
2021年第3期1-4,共4页
Journal of Hebei Forestry Science and Technology
基金
江西省教育厅科技项目《杉木种子园冬季嫁接技术研究》(项目编号:GJJ204408)
赣州市森源科技种苗场省级杉木圆齿野鸦椿种质资源库项目
关键词
杉木
扦插苗
苗木分级
聚类分析
Cunninghamia lanceolata
cutting seedlings
seedling grading
cluster analysis
