杉木第3代良种改良效果早期分析

Early analysis on improvement effect of 3rd generation cultivar in Cunninghamia lanceolata

为了解杉木第3代良种的改良效果,2015年在福建省泰宁国有林场营建了杉木第3代良种改良效果测试林。造林6a后,品种间、品种内单株间生长差异结果表明:第3代良种平均树高为6.73 m,比第2代良种高9.97%;平均胸径为10.94 cm,比第2代良种大28.86%;平均单株立木材积为0.03782 m3,比第2代良种大70.59%。且第3代良种林分单株间生长分化较第2代良种林分小,林相更整齐。因此,泰宁产区可利用杉木第3代良种营造速生丰产林。

In pursuit of revealing the improvement effect of 3rd generation cultivar of Cunninghamia lanceolata,a test plantation was carried out on National Forest Farm of Taining in 2015.The results of comparing growth trait and individual growth variation showed that the tree height,DBH,and volume of 3rd generation cultivar of C.lanceolata were 6.73 m,10.94 cm,and 0.03782 m3,respectively,which were 9.97%,28.86%,and 70.59%higher than those of the 2nd generation cultivar at 6 years age.In addition,compared with 2nd generation cultivar,3rd generation cultivar has higher stand uniformity and obvious early growth gain,which can be popularized and applied as a fast-growing and high-yielding cultivar in Taining area.