不同杉木第3代种子园良种幼林生长差异

Differences of Growth of Cunninghamia lanceolata Young Forest from DifferentOrigins of Third-generation Seed Gardens of C.lanceolata

在福建省顺昌埔上国有林场,以7个杉木第3代种子园(南平洋口、南平卫闽、南平建阳、三明将乐、三明永安、漳州西陂、龙岩白砂)种子营建的3~6年生测定林为研究对象,经连续4 a的生长量调查和生物量测定,筛选适合于顺昌种植的杉木第3代种子园良种。结果表明:不同林龄、不同种子园良种测定林生长量、林分蓄积量及生物量具有一定的差异,综合林木生长量及林分生物量指标,筛选出三明将乐、南平建阳、南平卫闽的第3代杉木种子园良种为较适合顺昌种植,其6年生树高生长量依次为3.25、2.83、3.42 m,胸径生长量依次为4.57、4.30、4.85 cm,林分蓄积量依次为71.35、63.01、69.51 m^(3)·hm^(-2),地上部分总生物量依次为94.74、93.91、90.82 t·hm^(-2)。

The 3~6 year-old Cunninghamia lanceolata determination forests established after seedling breeding in 3rd generation fir seed orchards from 7 different origins in Fujian Province(Yangkou,Weimin,Jianyang,Jiangle,Yong′an,Xibei and Bai sha)were used to screen the good origins of 3rd generation fir seed orch ards suitable for planting in Shunchang through growth survey and biomass determ ination.The results showed that there were some differences in the growth,stan d volume and biomass of the seed orchards of different provenances at different survey times.The combined stand growth and stand biomass indexes indicated that Sanming Jangle,Nanping Jianyang and Nanping Weimin were more suitable for the excellent production areas of fir 3rd generation seed orchards in Shunchang,th e tree height growth was 3.25,2.83 and 3.42 m,the DBH growth was 4.57,4.30 and 4.85 cm,the stand volume was 71.35,63.01 and 69.51 m^(3)·hm^(-2) and the biomass was 94.74,93.91 and 90.82 t·hm^(-2),respectively.