不同杉木种子园良种造林生长对比分析

Comparative Analysis on Growth Trait of Improved Vari eties of Different Chinese Fir Seed Orchards

2018年,在福建省邵武卫闽国有林场开展11个杉木种子园良种造林对比试验,对不同杉木良种3 a林龄的试验林生长差异进行分析。结果表明:3 a林龄时,各参试良种间生长性状差异较大,重复、品种、重复×品种在树高、胸径、单株立木材积间差异均达到极显著水平。树高生长表现最优的是将乐3代和卫闽3代,均达到4.54 m,高于总体水平8.75%;胸径生长表现最优的是尤溪3代,达7.52 cm,高于总体水平16.20%;单株立木材积表现最优的是将乐3代,达0.0142 m^(3),高于总体水平37.51%。参试良种树高、胸径、单株立木材积变异系数分别在17.56%~32.27%、25.55%~47.49%、52.03%~98.17%之间。选取树高、胸径、单株立木材积表现最优和变异系数最小的前5个参试良种,只有尤溪3代、永安3代入选,说明这2个良种在邵武当地表现良好,具有较高的稳定性,品种分化程度小,林分整齐度好,适应当地立地条件及气候,可作为当地重点推广应用良种参考。

In 2018,Fujian Shaowu Weimin State-owned Forest Farm made a comparative experiment on the afforestation of 11 improved Chinese fir seed orchards,which analyzed the experimental forest growth differences of different improved Chinese fir varieties with the 3a forest age.The results show that there are significant differences in growth traits among the tested varieties when the trees at 3 years old;repetition,variety and the interaction between repeated and varieties have shown the very significant difference in tree height,DBH(diameter at breast height)and individual volume.The one with the optimal performance in tree height is the Jiangle third-generation cultivar and Weimin third-generation cultivar,which reaches 4.54 m respectively.It is 8.75%higher than the overall level.The one with the optimal performance in tree DBH is the Youxi third-generation cultivar,which reaches 7.52 cm.It is 16.20%higher than the overall level.The one with the optimal performance in individual volume is Jiangle third-generation cultivar,which is 0.0142 m^(3)and 37.51%higher than the overall average level.The variation coefficients of the height,DBH and stand volume of the tested varieties range from 17.56%~32.27%,25.55%~47.49%and 52.03%~98.17%respectively.Youxi and Yong′an third-generation cultivar were ranked top 5 in each trait,which means that the two varieties grow well in Shaowu area.The two varieties were high in stability and small in variety differentiation,and adapt to the local site conditions and climate.It can be uesd as a reference for Shaowu area promotion and application of improved varieties.