晋西黄土区刺槐人工林水土保持作用分级标准  

A Study on the Classifiable Criterion of Effects on Soil and Water Conservation of Robinia L. in Loess Region of West Shanxi

作　　者：余新晓[1] 张建军[1] 陈丽华[1] 张宝颖[1] 王冬云 

机构地区：[1]北京林业大学水土保持学院,云南省林业勘查设计院

出　　处：《北京林业大学学报》1994年第2期43-50,共8页Journal of Beijing Forestry University

基　　金：属于"七五"国家重点攻关项目

摘　　要：以晋西黄土地区防护林体系主要树种──刺槐人工林的生长情况与水土保持作用的关系为基础，综合利用判别分析、多元线性回归及数量化模型Ⅰ，Ⅱ等方法进行了统计分析，并与基准变量逐步拟合，提出了水土保持林在郁闭度、盖度、冠高、枯落物重及林地破坏情况下的最低标准，并得出数学模型与计算方法，评价其它样地的等级；同时根据上述各项指标对防护林体系进行了等级划分，其中Ⅰ，Ⅱ级林可起到水土保持作用，Ⅰ级林水土保持作用微小．最后根据调查提出了对不同水土保持作用林分的抚育管理初步意见。Based on the relationship between the growth of Black Locust and its ecologi-cal effects on soil and water conservation in the loess region, this paper presents the classifi-able criterion using crown density,cover degree, height of crown, weight of litter and destrc-tive situation of forest land for protective forests by using a series of statistical methods.Amathematical model has been proposed , which is used to evaluate the classification of plots.The study concluded that there are three different classes of protective forests of which classland 2 have good effects on soil and water conservation,but class 3 has only little effect.From the investigation in experimental areas ,the authors propose suggestions for the man-agement of protective forests.

关 键 词：刺槐 人工林 水土保持 分级标准 

分 类 号：S792.270.2[农业科学—林木遗传育种]