普通油茶岑软3号苗木分级研究

[目的]对岑软3号苗木分级进行研究,进一步规范其出圃规格,提高苗木质量。[方法]以1年生的岑软3号嫁接苗为材料,测量其苗高、地径、叶片数等8个性状,利用主成分分析和逐步聚类分析法对苗木质量进行分级。[结果]28对性状组合中有22对存在(极)显著相关;主成分分析提取了前4个主成分,保留了82.8%的信息,地径、苗高、叶片数和上部鲜重为主要指标;逐步聚类将岑软3号苗木分成3类;确定其苗木分级:Ⅰ级苗的苗高H≥32.739 cm,地径D≥0.410 cm;Ⅱ级苗的苗高H≥20.666 cm,地径D≥0.323 cm。[结论]逐步聚类将岑软3号苗木分为3类,其中Ⅰ级苗5株,Ⅱ级苗29株,Ⅲ级苗38株。

Study on Seedling Grading of the Oil -tea Cultivar Cenruan No.3

Objective]Seedling grading of the oil-tea cultivar Cenruan No.3 was studied to standardize planting specification ,improve the seed-ling’s quality.[Method]8 traits such as height, ground diameter,leaf number,etc.were measured based on the one-year old grafting seedlings of Cenruan No.3.Seedlings grading was carried out using the principal component analysis and clustering analysis .[ Result]The results indicated that 22 of 28 pairwise traits were (extremely) significant between 8 traits;4 principal component analysis were extractedwith 82.8%information. Height,ground diameter,leaf number and above fresh weight were major indices.The seedlings of Cenruan No.3 were divided into 3 groups by stepwise clustering;seedling grading was determined as following:Ⅰgrade H≥32.739 cm,D≥0.410 cm,Ⅱgrade H≥20.666 cm,D≥0.323 cm. [Conclusion]The seedlings of Cenruan No.3 were divided into 3 groups by stepwise clustering,Ⅰgrade 5 plants,Ⅱ grade29 plants,IIIgrade 38 plants.