摘要
根据立地主导因子(坡向、坡位、土层厚度)与混交状况,对山东昆嵛山赤松林划分林型,将其归纳为4个林型组(山脊阳坡薄土赤松林,阳坡中土厚土赤松林,阴坡中土厚土赤松林,阴坡阳坡中厚土松阔混交林)。并对不同林型的群落结构与林分生产力进行了研究。结果表明:赤松纯林面积较大,林龄多为30～50年生的中龄林、同龄林,混交树种多为栎类(麻栎、栓皮栎等)。林下灌木层与草本层发育较好,样地中常见约20个灌木种,近40种草本。林木与林分生产力较低,立地较好的中龄林林分蓄积量约30～50m3/hm2,平均材积生长量1～2m3/hm2;松阔混交林蓄积量超过90m3/hm2,年均材积生长量达2～3m3/hm2。
It held the largest area of nature Pinus densiflora forests in the world in Kunyu Mountain National Nature Reserve,Shandong Province of eastern China.According to the slope aspect,slope position,soil thickness of the sites and dominant tree species,we classified P.densiflora forests in this reserve into 4 groups,and then investigated the structure and productivity of the forest community in relation to different forest types.The results showed that the pure P.densiflora forests occupied the largest area in this reserve,and it was predominately characterized by even-aged stands and half-mature forests of 30-50 years old mixed with Quercus spp.The shrub and herb layers of undergrowth developed well,and we recorded about 20 species of shrub and 40 species of herb in the sample plots.The stand productivity,however,was rather lower.The middle-aged forest located at suitable sites held 30-50 m3/hm2 of the stand volume and 1-2 m3/hm2 of the annual average increment.In addition,the stand volume of the mixed forest of P.densiflora and broadleaved tree species was more than 90 m3/hm2 and the annual increment was 2-3 m3/hm2.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2012年第1期19-24,共6页
Journal of Beijing Forestry University
基金
国家林业局推广项目(2010-26)
关键词
赤松
林型
森林群落结构
生产力
Pinus densiflora
forest type
forest community structure
productivity
