福建南部红锥优树选择研究

Study on Selection of Superior Trees of Castanopsis hystrix in Southern Fujian

采用5株对比木法,对福建安溪县不同的红锥天然林群体进行调查和优树选择,共初选出红锥候选优树30株,对比优势木146株。经统计分析,确定红锥林中优树的选择标准为:优树胸径、树高、单株材积分别超过对比优势木平均值的37%、170%和860%,形质指标综合分值大于等于8.0;以材积和形质性状综合分值作为选优的双重控制标准,则入选优树14株,入选率为46.7%。研究结果将为福建省红锥用材林优树选择提供标准,福建地区红锥的种质保护、遗传改良和良种基地建设奠定基础。

Different natural forest populations of Castanopsis hystrix in Anxi County, Fujian Province, were investigated by dominant comparative method to select superior trees. A total of 30 superior trees and 146 comparative dominant trees of C. hystrix were selected. On the basis of statistical analysis, the selection criteria for determining the superior trees in the C. hystrix forest were as follows: the diameter at breast height (DBH), tree height and volume were 37 %, 170 % and 860 % higher than the mean values of dominant trees respectively, and the comprehensive score of the shape index was greater than or equal to 8.0. While the comprehensive score of volume and shape traits were selected as the dual control standard, 14 superior trees were selected, with a inclusion rate of 46.7 %. The research results provide reference and basis for the subsequent selection of C. hystrix in the future. It can also provide a basis for germplasm conservation, genetic improvement and further promotion of afforestation of C. hystrix in Fujian.