秦皇岛市低山丘陵区灌木种间联结分析  

THE ASSOCIATION ANALYSIS OF BUSH SPE- CIES IN HILLY AREA OF QINHUANGDAO

作　　者：王德艺[1] 安明 沈淑芳[1] 

机构地区：[1]河北林学院林学系,河北省尚义县职业中学,河北林学院高教研究室

出　　处：《河北林果研究》1994年第S1期115-121,共7页Hebei Journal of Forestry and Orchard Research

摘　　要：应用２×２联列表和ｘ２检验方法，对秦皇岛市低山丘陵区２２种常见灌木做了种间联结分析。结果表明，在α＝０．０５的置信水平，显著正联结种对有４７个，显著负联结种对４５个；在α＝０．０１的置信水平，极显著正联结种对有４０个，极显著负联结种对３５个。根据种间正、负联结种对数量，将２２种灌木的种间关系分为紧张、中庸和松散３种类型。This paper makes association analysis of bush species,using the contigency tableof 2 × 2 and x2test method.The results snow tnat at tne confidence level Of α=0.05,there are47 notable species pairs with positive association and 45 with negative one,and that at theconfidence level of α=0.01, there are 40 extremely notable species pairs with positive associa-tion and 35 with negative one. According to the numbers of the species with positive and neg-ative assocition,the relations of the species of 22 bush species can be divided into 3 types:tense,middling and loose relations.

关 键 词：种间联结分析 灌木 低山丘陵 秦皇岛市 

分 类 号：S718.5[农业科学—林学]