胡桃楸早期选择的初步研究

A PRELIMINARY STUDY ON THE EARLY SELECTION OF JUGLANS MANDSHURICA

用东北林业大学帽儿山实验林场胡桃楸(Juglans mandshurica)天然林和人工林各10和12株优势木的树干解析材料分析表明:高、径生长由剧烈分化到相对平稳的转折年龄天然林为15a,人工林为12—14a,幼成龄相关系数随幼期年龄的增加而增大,增大速率依不同类型的相关和不同起源的林分而异,人工林6与22a树高相关就达显著水平,早期选择效率随幼龄增加,人工林呈“峰状”分布,天然林则依次下降。初步确定该地区胡桃楸最佳早期选择龄天然林为15a,人工林为14a,

Through stem analysis of 10 Dominant trees from natural forest and 12 dominant trees from plantation of Juglans mandshurica Maxim in Maoer M. Experiment Station of the Northeast Farestry University, it expresses that the age of the height and diameter growth from violent differentation to relative stablenss is fifteen years for the natural forest and twelve-fourteen years for the plantation. The correlation coefficient between juvenile and nature forest increases along with the juvenile age. The increase speed is different from difterent correlation and different original stands. Six year height of the trees for the plantation has highly correlation with 22 year height of the trees, It presents 'Peak Shape'distribution for the plantation, The best age of the earlyselection of Juglans mandshurica Maxim in this area is 15 for the Natural forestand 14 years for the plantation.