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内蒙古典型草原不同恢复演替阶段植物养分化学计量学
引用本文:银晓瑞,梁存柱,王立新,王炜,刘钟龄,刘小平.内蒙古典型草原不同恢复演替阶段植物养分化学计量学[J].植物生态学报,2010,34(1):39-47.
作者姓名:银晓瑞  梁存柱  王立新  王炜  刘钟龄  刘小平
作者单位:1内蒙古大学生态与环境科学系, 中美生态、能源及可持续性科学内蒙古研究中心, 呼和浩特 010021; 2内蒙古煤矿设计研究院, 呼和浩特 010010; 3内蒙古鄂尔多斯市环境监测中心站, 鄂尔多斯 017000
摘    要:对内蒙古典型草原不同恢复演替阶段群落土壤养分动态及空间格局、植物养分及其化学计量比时空动态、植物与土壤养分相关性等进行了分析,以揭示放牧干扰对植物的养分及其化学计量比影响。结果表明:土壤各养分含量表现为恢复群落略高于严重退化群落,土壤全氮(STN)/土壤全磷(STP)恢复群落高于严重退化群落,土壤有机质(SOC)/STN恢复群落低于严重退化群落;大多数植物叶片C含量在恢复群落最高,严重退化群落最低,与恢复演替时间呈正相关,而植物的全氮(TN)和全磷(TP)含量则是严重退化群落最高,恢复群落最低,与退化程度呈正相关,且TP含量的变幅明显高于TN含量;植物叶的N:P和C:N表现为严重退化群落最低,与退化程度呈负相关;严重退化群落植物相对于P而言,总体上表现为缺N;而恢复群落相对于N而言,更为缺P,或同时缺N和P;群落优势种化学计量学特征对群落演替方向有一定的指示作用。

关 键 词:退化  生态化学计量学  养分动态  恢复演替  典型草原

Ecological stoichiometry of plant nutrients at different restoration succession stages in typical steppe of Inner Mongolia, China
YIN Xiao-Rui,LIANG Cun-Zhu,WANG Li-Xin,WANG Wei,LIU Zhong-Ling,LIU Xiao-Ping.Ecological stoichiometry of plant nutrients at different restoration succession stages in typical steppe of Inner Mongolia, China[J].Acta Phytoecologica Sinica,2010,34(1):39-47.
Authors:YIN Xiao-Rui  LIANG Cun-Zhu  WANG Li-Xin  WANG Wei  LIU Zhong-Ling  LIU Xiao-Ping
Institution:1Department of Ecology and Environment Sciences, Inner Mongolia University; Sino-US Center for Conservation, Energy and Sustainability Science in Inner Mongolia (SUCCESS), Hohhot 010021,China; 2Inner Mongolia Coal Mine Design & Research Institute, Hohhot 010010, China; and 3Erdos Environmental Monitoring Central Station, Erdos 017000, China
Abstract:Aims Much research is being done on plant nutrients and stoichiometry. Our purpose was to reveal the effects of grazing on plant nutrients and stoichiometry in a typical steppe of Inner Mongolia of China.Methods We studied nutrient content of C, N and P and their ratio in soil and leaves of dominant plants in three adjacent sites: fenced since 1983 and 1996 and unfenced. We employed the stoichiometric approach and assessed the effects of grazing on spatio-temporal patterns of nutrient cycling between plants...
Keywords:degradation  ecological stoichiometry  nutrients dynamics  succession  typical steppe
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