15个种源东部白松幼林期生长性状评估及选择

Selection and growth property evaluation of 15 provenances of Pinus strobus saplings

为筛选出适合辽东山区的东部白松优良种源,以从加拿大引进的15个种源9年生东部白松林分为研究对象,对其树高、胸径、冠幅等生长指标及保存率进行调查和分析,结果表明,15个种源的东部白松保存率和生长量均显著高于红松对照,东部白松种源之间也达到显著差异水平;筛选出3个优良种源的树高、胸径、冠幅(东西+南北)和单株材积平均值分别为4.60 m、6.32 cm、2.28 m+2.28 m、0.009 m^3,分别比红松对照和种源平均值高85.48%和12.20%、153.82%和14.49%、88.43%+79.53%和12.32%+11.76%、800%和28.57%。

In order to select the suitable provenances of Pinus strobus for the mountainous area of east Liaoning,experiment was conducted in 9-year-old Pinus strobus forests including 15 provenances from Canada,the survival rate and the growth indexes such as tree height,DBH and crown width were investigated and analyzed.The results showed that the survival rate and growth of seedlings were significantly different among provenances,and were significantly higher than that of the Pinus koraiensis control.Three superior provenances were selected.Tree height,DBH,crown width(east,west+north,south)and average volume of the three provenances were 4.60 m,6.32 cm,2.28 m+2.28 m and 0.009 m^3 respectively,which were 85.48%and 12.20%,153.82%and 14.49%,88.43%+79.53%,12.32%+11.76%,800%and 28.57%higher than that of the control and mean value of provenances,respectively.