柳杉不同海拔和立地条件造林效果分析

Studyed on Effects of Cryptomehia Plantation at Different Altitudes and Site Conditions

对福建省福鼎后坪国有林场不同海拔(300、500、800 m)、不同立地条件(Ⅰ类地、Ⅱ类地、Ⅲ类地)的7年生柳杉人工林的生长量进行调查分析。结果表明,柳杉人工林的树高、胸径、材积生长量总体上随着海拔高度的升高而增大,且在立地条件较好的Ⅰ类地和Ⅱ类地的生长表现较好。方差分析结果表明,柳杉人工林的树高、胸径、材积生长量在不同海拔、立地条件间的差异达到极显著水平。多重比较进一步显示,柳杉人工林的树高、胸径、材积生长量在不同海拔间的差异均达到极显著水平;Ⅰ类地与Ⅱ类地间差异不显着,但均与Ⅲ类地差异达极显著水平。说明柳杉比较适合在高海拔地区、Ⅱ类地以上的立地条件生长。

The growth of three altitudes including 800 m,500 m and 300 m in different site conditions were analysed in Cryptomehia plantation established at 7 years old in Houping forest farm,Fuding,Fujian.The results were as followes：the growth performance of cryptomehia plantation was more and more better along with altitude increasing and in theⅠsite conditions and Ⅱsite condi-tions.Differences of tree height, DBH and volume were very significant among different altitudes and different site condi-tions.Multiple comparisons showed that differences of tree height,DBH and volume were not significant amongⅠsite conditions andⅡsite conditions,and very significant among Ⅰsite conditions orⅡsite conditions and Ⅲ site conditions, but differences of tree height,DBH and volume were very significant among all different altitudes including 800 m,500 m and 300 m.All of these showed that the Cryptomehia plantations were suitable in the high altitudes and Site Conditions orⅡsite conditions.