摘要
对新疆巴音布鲁克高寒草地植物群落4个物种多样性指数和14个土壤指标进行回归分析,结果表明,全盐,HCO3-,Ca2+,速效N,pH值,土壤含水量与物种多样性有显著相关关系(P<0 05)。全盐,HCO3-,Ca2+,速效N和土壤含水量与丰富度指数的最好拟合为二项式,pH值与丰富度指数的最好拟合为直线回归,全盐,Ca2+和pH值与Shannon—Wiener指数的最好拟合为二项式,土壤含水量与Shannon—Wiener指数的最好拟合为直线回归,这表明物种多样性与土壤环境因子的关系并不是简单的正相关或负相关关系。
The plant communities＇ species diversity of alpine-cold grassland in different elevation gradients was studied. Regression analysis was used to study the relationships between 4 diversity indexes and 14 soil factors. Results indicated that total salt content, HCO3^-, Ca^2＋, available nitrogen, pH, and soil moisture content were correlative to species diversity significantly （P〈0.05）. The relationship among diversity, total salt content, HCO3^-, Ca^2＋ , available nitrogen, and soil moisture content was best fitted by binomial model. The relationship between pH and richness index was best fitted by linear model. The relationship among Shannon-Wiener index, the total salt content, Ca^2＋ , and pH was best fitted by binomial model. The relationship between soil moisture content and Shannon-Wiener index was best fitted by linear model. The results showed that diversity did not have a simple negative or positive relationship with the soil factors.
出处
《水土保持通报》
CSCD
北大核心
2009年第3期118-122,共5页
Bulletin of Soil and Water Conservation
基金
中国科学院新疆生态与地理研究所前沿领域项目(20049016)
全球环境基金新疆草地资助项目(GEF)
关键词
高寒草地
海拔梯度
物种多样性
土壤环境因子
alpine -cold grassland
elevation gradients
species diversity
soil factor
