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当前位置: 首页 > 文章 > 坡垒种苗分级标准研究 热带林业 2016,44 (1) 22-25
Position: Home > Articles > Grading standard of Hopea hainanensis seedings Tropical Forestry 2016,44 (1) 22-25

坡垒种苗分级标准研究

作  者：
方发之;杨众养;吴钟亲;陈彧;韩东苗;陈修仁
单  位：
海南省林业科学研究所;四川农业大学林学院
关键词：
坡垒;种苗;聚类分析;分级标准
摘  要：
随机抽取60株苗龄为240d的坡垒种苗,测定其地径、苗高、冠幅、叶片数、主根长、根数、全株鲜重、地上部分重量及地下部分重量,通过相关分析确定地径和苗高作为种苗分级2个重要质量指标,利用逐步聚类分析法建立分级标准,制定出坡垒种苗的分级标准为:Ⅰ级苗:地径≥0.45cm,苗高≥40.31cm;Ⅱ级苗:0.45cm>地径≥0.36 cm,40.31cm>苗高≥27.29cm,Ⅲ级苗:地径<0.36cm,苗高<27.29cm。该研究结果可为坡垒种苗的规模化、规范化生产提供参考依据。
译  名：
Grading standard of Hopea hainanensis seedings
作  者：
Fang Fazhi;Yang Zhongyang;Wu Zhongqin;Chen Yu;Han Dongmiao;Chen Xiuren;Hainan Forestry Institute;College of Forestry,Sichuan Agricultural University;
关键词：
Hopea hainanensis;;Seedling;;Grading standard;;Clustering analysis
摘  要：
In oder to set the grading standards of Hopea hainanensis seedings, 60 samples of 240- day- old Hopea hainanensis seedings were selected as testing materials at random, and the ground diameter, seeding height, crown breadth, leaf number, main- root length, root number, wet weigh, the weight of ground part the weight,the weight of underground part. Ground diameter and seeding height were used as the quality indexes of seeding classification by the correlation analysis, and the grading standards were established by using the methods of gradual clustering analysis. And the established grading standard was: Grade Ⅰ seedings with ground diameter over 0.45 cm and height over 40.31 cm, Grade Ⅱ seedings with ground diameter of0.36- 0.45 cm and height of 27.29- 40.31 cm, Grade Ⅲ seedings with ground diameter less than 0.36 cm and height less than 27.29 cm. The established grading standard can provide references for the scale and standardization productin on Hopea hainanensis in Hainan.

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