摘要
对30年生的毛梾人工林分进行选优研究,采用优势木对比法和主成分分析法相结合,根据单位面积结实量、单序果数、果实直径等9个数量性状的权重,制定出综合选优评分体系和优树入选的最低分数限。结果表明,入选优树性状优良程度较高,其中,结果枝率、百果重、单位面积结实量、单序果数的平均增益均达到25%以上,选择效果较好,具有一定的科学性和可操作性。
Plus tree selection was carried out in a 30-year-old plantation of Cornus walteri.Methods of dominant comparison and principal component index analysis were adopted.The system of comprehensive rating for dominant trees and minimal marks of the trees to be selected were established based on the weights of 9 traits.The results showed that plus trees which were selected by the methods mentioned above demonstrated high degrees of excellence,in which the ratio of fruiting branch,weight of per hundred fruit,the fruiting amount of crown area,number of fruiting per cyme all were over 25%,indicating that the selection was successful,scientific,and good maneuverability.
出处
《西北林学院学报》
CSCD
北大核心
2012年第3期76-79,86,共5页
Journal of Northwest Forestry University
基金
林业公益性行业科研专项(200804010)
陕西省教育厅科研计划项目(06JK153)
关键词
毛梾
优树选择
性状权重
Cornus walteri
plus tree selection
character weight
