不同规格闽楠容器苗对造林生境的响应分析

Analysis on the Response of Phoebe bournei Container Seedlings with Different Sizes to Afforestation Habitats

为探讨闽楠不同苗龄与规格的容器苗在杉木林下套种和裸地造林下生长情况及光照需求特性,采用6种不同规格的闽楠苗木分别在杉木林下套种和裸地造林,比较其生长差异和对不同生境的响应。结果表明:(1)闽楠在幼林阶段,强光照直接影响闽楠的生长,但随着树龄的增长,闽楠需光性增强,闽楠在杉木林下套种和裸地造林的生长差异逐步缩小;(2)闽楠的Ⅰ级苗比Ⅱ级苗造林效果好,且在裸地造林时,其生长差异更明显;(3)闽楠在杉木林下套种和裸地造林均表明采用较大规格的容器苗造林效果较好,特别是闽楠在裸地造林时,建议采用3年生Ⅰ级的大规格容器苗造林,更有利于快速形成林分环境,提高造林效果。

The purpose of this study was to investigate the growth and light demand characteristics of container seedlings with different seedling ages and specifications of Phoebe bournei through interplant under Cunninghamia lanceolata forest and afforestation in bare land.In the study,six different specifications of Phoebe bournei seedlings were interplanted under Cunninghamia lanceolata forest and afforested in bare land respectively,and their growth differences and responses to different habitats were compared.The results showed as follows:(1)when Phoebe bournei grew in the young forest stage,strong light directly affected the growth of Phoebe bournei,but with the growth of tree age,its demand for light increased,and the growth difference of Phoebe bournei between interplant under Cunninghamia lanceolata and afforestation in bare land gradually decreased;(2)the afforestation effect of grade I seedling was better than that of grade II seedling,and the growth difference was more obvious through afforestation in bare land.(3)for Phoebe bournei,both interplant under Cunninghamia lanceolata forest and afforestation in bare land showed that the afforestation effect of using large-scale container seedlings was better,especially when Phoebe bournei was afforested in bare land,it was suggested to use large-scale container seedlings of grade I of 3-year-old for afforestation,which was more conducive to promoting the rapid formation of stand environment and improving the effect of afforestation.