封育对典型草原植物群落物种多样性及土壤有机质的影响  

Effects of enclosure on species diversity and soil organic matter of typical steppe

作　　者：赵菲[1] 谢应忠[1] 马红彬[1] 沈艳[1] 

机构地区：[1]宁夏大学草业科学研究所,宁夏银川750021

出　　处：《草业科学》2011年第6期887-891,共5页Pratacultural Science

基　　金：宁夏自治区国际合作项目(2009);高等学校博士学科点专项科研基金资助课题(20096401120002);国家自然科学基金项目(31001032)

摘　　要：研究了宁夏云雾山自然保护区不同封育年限典型天然草地植被物种多样性及土壤有机质含量。结果表明,随着封育年限的增加,物种丰富度和多样性呈先增加后降低的趋势,均匀性指数的变化总体与多样性变化趋势相反。不同封育年限土壤有机质含量存在显著差异,封育15年、25年的典型天然草地土壤有机质含量较高,封育5年、20年的典型天然草地土壤有机质含量居中,未封育的典型天然草地土壤有机质含量最低。草原植被物种丰富度指数与多样性指数和土壤有机质含量之间呈负相关关系,植被均匀度指数与土壤有机质含量有正相关关系。The species diversity and soil organic content of typical steppe with different enclosure years in Yunwushan nature reserve of Ningxia were studied.The results showed that：as enclosure years increasing,species richness and diversity index increased first and then decreased,but for evenness index,an opposite trends was observed.Soil organic matter showed a significant difference among different enclosure years in which enclosed 15 years and 25 years attained the highest soil organic matter,followed by enclosed 5 and 20 years,and the lowest appeared in the steppe without enclosure.Soil organic matter content was negatively correlated with species diversity,but positively correlated with evenness index.

关 键 词：封育 典型草原 植物群落 物种多样性 土壤有机质 

分 类 号：S812.2[农业科学—草业科学] Q948.15[农业科学—畜牧学]