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 stoichiometric ratio ,which includes Stipa krylovii at Lanqi temple ,S .grandis at Hulun tow n and S .klemenzii at Keerlun stipa kleme‐nzii .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 stoi‐chiometric ratio of N and P of the three species and soil is less than 14 .Fourthly ,the stoichiometric ratio of C and N of three species and soil (except S .klemenzii) is greater than 25 .
展开▼
