水土保持研究2013，Vol.20Issue(3)：257-262,6.
渭北地区水土保持林经营现状及分析
The Present Management Situation and Analysis of Soil and Water Conservation Forest in Weibei Region
摘要
Abstract
The two-stage sampling method was used,the indices of tree growth,diversity,soil relief and expansion index were set up following the ecological benefit assessment scheme and surveyed to study the situation of soil and conservation forest in Weibei region.The results show that the distribution of soil and water conservation forest in this region is imbalanced there are more forests in the west and north than the eastern and southern part of this region.The shelter forest has not yet entered a regeneration period,yet many nearmature forests have the decline appearance on the growth of tree DBH and height.Simple forest structure and shrub layer caused the lower forest diversity.The lack of regeneration blocks the renewable and duplicate of the forest.Moreover,the result of partial correlation shows that the crown density,number of tree,litter and so on have the synthetic action on the soil water holding capacity.All the results show that there are many problems (structure,growth and regeneration) in the soil and water conservation forest.In order to change this situation and realize the target of sustainability,a reasonable forest management design should be carried out.关键词
水土保持林/水土流失/二阶段抽样/可持续经营Key words
soil and water conservation forest/ soil loss/ two-stage sampling/ sustainable management分类
农业科技引用本文复制引用
刘宪钊,张静伟..渭北地区水土保持林经营现状及分析[J].水土保持研究,2013,20(3):257-262,6.基金项目
国家林业局公益性行业专项(201004002) （201004002）
博士后科学基金(2012M510331) （2012M510331）
