广西特色杉木优树选择标准研究
A Study of Superior Tree Selection Standard of Guangxi Characteristic Chinese fir
采用5株优势木对比法，对广西特色大横枝杉展开调查，探索大横枝杉的生长特性，以期为杉科植物良种选育提供理论依据。共初选优树35株，优势木175株。经统计分析，确定了大横枝杉优树选择最低标准：胸径和材积分别是优势木均值的207％和569％，树高大于优势木均值。根据该标准，对35株候选优树进行复选，获得大横枝杉Ⅰ级优树19株，Ⅱ级优树6株，入选率分别为：54.29％和17.14％，可为大横枝杉无性系种子园营建提供优质种质材料。
In order to provide a theoretical basis for the selection and breeding of improved varieties of Taxodiaceae plants,the growth of Guangxi characteristic Cunninghamia lanceolata were investigated by using five dominant tree comparison methods.A total of 35 superior trees and 175 dominant trees were selected.Through statistical analysis,the minimum standard for the selection of superior trees was determined:DBH and volume were 207％and 569％of the average value of dominant trees,respectively,and tree height was greater than the average value of dominant trees.According to this standard,35 candidate superior trees were re-selected,and 19 superior trees of grade I and 6 superior trees of grade II were obtained.The selection rates were 54.29％and 17.14％,respectively,which could provide high-quality germplasm materials for the construction of clonal seed orchard of Guangxi characteristic Cunninghamia lanceolata.
程琳;黄开勇;陈琴;蓝肖;蒲贤娴;谢文宇;
广西壮族自治区林业科学研究院,广西 南宁 530002;广西壮族自治区林业科学研究院,广西 南宁 530002;广西壮族自治区林业科学研究院,广西 南宁 530002;广西壮族自治区林业科学研究院,广西 南宁 530002;广西大学,广西 南宁 530001;华中农业大学,湖北 武汉 430074;
Guangxi characteristic Cunninghamia lanceolata superior tree selection variation rule
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