彰武沙地樟子松不同种源生长表现

Growth Performance of Different Provenances of Pinus sylvestris var. mongolica

采用14年、23年两个年龄阶段实测数据对比分析了不同种源樟子松在彰武沙地的生长表现。结果显示:以章古台当地种源为对照,其他种源的樟子松树高和胸径生长与对照有差异但不显著,其中红花尔基种源生长表现最好且稳定;各种源树高、材积生长的遗传力呈现逐年下降趋势,23年树高遗传力仅为58%,相对14年下降幅度达29.4%;气候及立地条件等环境因子对生长的影响逐年增强;幼龄林阶段及之前的人工林种源生长表现优于天然林种源;23年时中龄林阶段的天然林种源生长表现优于人工林种源。

The growth performance of different provenances of Pinus sylvestris var.mongolica in Zhangwu sandy land in 14 a&23 a was compared.Result shows that taking local provenance of Pinus sylvestris var.mongolica as the control,the growth of tree height and DBH have differences with he control,but not significant.The growth of provenance of Pinus sylvestris is the optimal and stable.The heritability of tree height&volume growth shows a downward trend year by year.The high heritability of 23 a tree is only 58%,which is lower than 14 a.The growth rate is up to 29.4%.The effects of environmental factors such as climate and site conditions on growth are increasing year by year.The provenance of plantation at young-forest stage and previous plantations is optimal than that of natural forest.The growth of provenance of 23-year-old natural forest is optimal than that of natural forest.