运用投影寻踪法分级利用闽北生态公益林的研究

Utilizing Non-commercial Forest with Projection Pursuit Method in Northern Fujian Province

结合资料采用样地法对闽北生态公益林样地的坡度、坡长、盖度、生物多样性、生物量和人为干扰等因子进行调查,运用投影寻踪原理将闽北生态公益林分为3类进行分级利用.研究发现:坡度增加、土壤侵蚀加剧和人为干扰增加不利于生态公益林的利用.坡度对生态公益林的利用有临界值,可利用生态公益林的坡长有上限值,而生态公益林的利用与盖度、生物量和生态多样性之间关系没有明显的规律性.通过主成分分析说明了指标之间的复杂关系和指标选取的必要性.

Based on the literature and the investigation of non-commercial forest with the index including angle and length of slope,plant coverage,diversity,biomass and anthropogenic activity in northern Fujian Province,the non-commercial forest had been classified into three types for utilizing purpose with the principle of projection pursuit. The results showed that there are unfavorable to utilize non-commercial forest with the increase of slope,soil erosion and human disturbance. There is a threshold of slope to utilize non-commercial forest,an upper limit of slope length to non-commercial forest which can be available,but there is no obvious regularity between the non-commercial forest and cover,biomass and diversity. There are the complex relationships between indexes by the method of the principal component analysis.