摘要
以大兴安岭山杨(Populus davidiana)低质林为研究对象,通过带状改造,3种改造带宽分别为10(改造带S1、S2、S3)、20(改造带S4、S5、S6)、30 m(改造带S7、S8、S9),将每条改造带分成4段,分别种植西伯利亚红松(Pinus sibirica)、樟子松(Pinus sylvestris var.mongolica Litv.)、兴安落叶松(Larix gmelinii)、红皮云杉(Picea koraiensis Nakai);运用主成分分析法,选取林下枯落物持水性能、土壤理化性质、生物多样性、冠层结构、光合作用、更新苗木生长等38项指标,建立低质山杨林不同模式改造效果的综合评价体系,对各个样地不同模式改造效果进行综合评价。结果表明:不同模式改造效果综合得分,由高到低依次为S2、S3、S6、S4、S8、S1、S7、对照样地、S5、S9,S2样地的综合得分最高,筛选出10 m改造带中20 m保留带的改造模式效果最好。
Strip transformation test zone with different bandwidths,namely the bandwidth of 10 m(S1-S3),20 m(S4-S6) and30 m(S7-S9),each zone was divided into four sections,planting Pinus sibirica,Pinus sylvestris var.mongolica Litv.,Larix gmelinii and Picea koraiensis Nakai,respectively,and the principle component analysis(PCA) method was used to establish the comprehensive evaluation system of forest transformation effects including 38 indices such as water holding capacity of litter,soil physical and chemical properties,biodiversity,canopy structure,photosynthesis,regeneration,etc.The descending order of the effect of different transformation models was S2,S3,S6,S4,S8,S1,S7,CK,S5,and S9.Therefore,the transformation model of S2 was the best.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2016年第8期7-12,共6页
Journal of Northeast Forestry University
基金
林业科学技术推广项目([2015]06号)
关键词
低质山杨林
低质林改造
带状改造
大兴安岭
Low-quality Populus davidiana forest
Low-quality forest transformation models
Strip transformation
Daxing'an Mountain