呼伦贝尔草原针茅属植物及土壤CNP的化学计量特征  

Stoichiometric Characteristics of Stipa and Soil's CNP in Hulun Buir Grassland

作　　者：崔艳智 李琪 熊坤 

机构地区：[1]大连民族大学环境与资源学院,辽宁大连116600

出　　处：《绿色科技》2015年第7期1-3,共3页Journal of Green Science and Technology

基　　金：大连民族大学"太阳鸟"学生科研资助项目(编号:tyn2014326;tyn2014325);中央高校基本科研业务(编号:DC201501070101;DC201501070402)资助

摘　　要：为了研究呼伦贝尔3种典型草原的生态化学计量学特征,以兰旗庙克氏针茅、呼伦镇大针茅和克尔伦苏木小针茅为研究对象,综合研究了3种植物地上地下及土壤的C、N、P含量及其生态化学计量比特征。研究表明:全碳含量除大针茅之外,其他两种植物地上养分均低于地下养分,全氮含量和全磷含量恰好与全碳相反;3种不同针茅群落的植物地下养分含量特征与其土壤养分特征基本一致,而植物地上养分含量特征与其土壤特征却没有明显的相关性;3种针茅和它们所生长土壤的氮磷化学计量比值均小于14;3种针茅和它们所生长土壤(除小针茅外)的碳氮化学计量比值均大于25。In order to analyze the ecological stoichiometric characteristics of three typical grasslands in Hulun Buir, the article takes three stipa capillatas as research objects to study the content of CNP in the aboveground, underground and the soil as well as the ecological characteristics of stoichiornetric ratio, which includes Stipa krylovii at Lanqi ternple,S, grandis at Hulun town and S. klemenzii at Keerlun stipa klemenzii. The results include three parts. Firstly,the content of C in Stipa in the aboveground part is less than that in underground part except S. grandis. However,the contents of N and P are all opposite to the content of C. Secondly,the CNP of three Stipas in underground part is basically the same with that in soil,but the CNP of three Stipas in aboveground parts has no significant correlation with that in soil. Thirdly, the stoichiometric ratio of N and P of the three species and soil is less than 14. Fourthly,the stoichiornetric ratio of C and N of three species and soil （except S. klemenzii） is greater than 25.

关 键 词：化学计量学特征 碳 氮 磷 碳氮比 氮磷比 

分 类 号：Q948[生物学—植物学]