河北坝上弃耕地植被的演替特征及环境因子的影响  

SUCCESSIONAL CHARACTERISTICS OF VEGETATION ON OLD-FIELD AND EFFECTS OF ENVIRONMENT FACTORS ON THE VEGETATION

作　　者：李进[1] 赵雪[1] 宝音[1] 张强[1] 

机构地区：[1]中国科学院兰州沙漠研究所

出　　处：《中国沙漠》1994年第4期15-22,共8页Journal of Desert Research

摘　　要：利用聚类与排序手段，由植被的空间序列推断其时间序列的方法对河北坝上弃耕地植被的演替进行了分析。结果表明：１）该研究区弃耕地植被共有６个群丛、３个亚群丛，植被严重退化。２）对于植被的数量分析，一般情况下只选用适宜的排序手段即可达到分类与排序之目的。３）影响弃耕地植被演替的因素多种多样，并非弃耕时间单一因素。４）弃耕地植被中植物种类数目变化具有明显的波动性。５）“初始植物种类组成”原理不适于本地区弃耕地植被的演替。０）弃耕地植被的改造利用宜在弃耕后２－６年内进行。The successional characteristics of vegetation on old-field in Bashang region of HebeiProvin ce were analysed by means of cluster and ordination methods and inferred their temporalsequence from spatial sequence. The results showed that there are 6 associations and 3 sub-associationson the old-field; many factors rather than the single time factor affected the vegetation development;the variation in the number of plant species has a markedly fluctuation; the principle Initial FloristicComposition is not suuitable to the succession of the vegetation in the region; the transformation andutilization of vegetation on old-field should be proceeded a fter the farmland has been abandoned from2-6years.

关 键 词：弃耕地 植被演替 聚类 排序 环境因子 种草 

分 类 号：S283[农业科学—农业水土工程] Q948.15[农业科学—农业工程]