摘要
本文采用主分量分析及判别分析的方法对河西走廊盐渍化草地土壤生态环境进行了研究,结果表明,前两个主分量反映了土壤盐分,有机质,结构及有害离子数量,可作为土壤生态指标;河西走廊盐渍化草地土壤可分为五类,文中给出了各类的环境特点,代表植物及分类指标,可作为进一步研究的基础。
Principal component analysis (PCA) and Byers discriminant analysis (DA)wereused to atudy the soil characters of saline grassland in Hixi Xorridor. The results showed that the differences in the total soluble salt, structure, organicmatter and poisonous irons in the soils can beidentified with the sbove methods. These suggested that PCA and DA could be used as the soil ecological indexex (SEI). The saline grassland soil was classified into 5 groups according to theirSEI. The environmental features and indicator plants of each group were described.
出处
《草业科学》
CAS
CSCD
北大核心
1991年第3期22-25,共4页
Pratacultural Science
基金
国家自然科学基金资助课题
任继周教授与朱兴运研究员主持的<河西走廊荒漠绿洲交错区草地培育优化模式研究>的一部分
关键词
盐渍化
草地
土壤
生态指标
分类
Saline grassland soil
ecological index
principal component analysis
discriminant analysis
