Abstract

通过测定祁连山东部亚高山草甸256个群落样方的群落物种数和地上植物的C、N、P元素含量,探究了该地区高产草地和低产草地植物群落物种多样性与植物群落C、N、P生态化学计量特征的关系。结果表明:高产样地植物群落C、N、P含量的平均值分别为53.05%、1.99%、0.22%;而低产样地植物群落C、N、P含量的平均值分别为52.51%、2.28%、0.19%。高产和低产样地植物群落C、N、P元素含量均呈现显著差异。高产样地上植物群落的物种数与N含量和N:P呈显著正相关关系,与C:N呈显著负相关关系,但与C、P含量和C:P无明显相关关系;低产样地上植物群落的物种数与N、P含量呈极显著负相关关系,与C:N和C:P呈显著正相关关系,但与C含量和N:P无明显相关关系。说明高产草地和低产草地植物群落物种多样性与养分元素化学计量特征显示出一定的分异性,高产样地上植物群落的物种数主要受N含量的限制,与N含量呈正相关关系;低产样地上植物群落的物种数则受N、P含量共同限制,与N、P含量呈负相关关系。

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.