草业科学2018，Vol.35Issue(1)：27-35,9.DOI:10.11829/j.issn.1001-0629.2017-0111
不同年限封育对黄土高原典型草原地上植被的影响
Effect of different enclosure durations on aboveground vegetation in typical steppe on Loess Plateau
摘要
Abstract
In this study,we analyzed community structure,species diversity,and succession dynamics of the aboveground vegetation in different enclosure durations of a typical steppe on the Loess Plateau.We conducted field surveys and laboratory analyses to disclose the dynamic variation of aboveground vegetation during the natural restoration process.The results showed that both the biomass and thickness of litter increased,the to-tal community increased initially and then gradually decreased,and the community density decreased with in-creasing fencing years.The total aboveground biomass and grass biomass both increased initially and then grad-ually decreased,and were the highest in grasslands with 32 years grazing exclusion.Species richness increased first and then decreased after the grasslands were fenced.There was no significant effect of fencing year on the Simpson diversity and Pielou evenness indices (P>0.05).The natural restoration under fencing management followed a general pattern,in which 1)forbs dominated in the early succession stage,2)Stipa bungeana grad-ually became dominant,and 3)the development of S.bungeana stabilized.关键词
封育年限/典型草原/群落结构/物种多样性/群落演替/地上生物量/地上植被Key words
enclosure duration/typical steppe/community structure/species diversity/community succession/aboveground biomass/aboveground vegetation分类
农业科技引用本文复制引用
赵凌平,白欣,谭世图,樊文娜,王占彬,王清义..不同年限封育对黄土高原典型草原地上植被的影响[J].草业科学,2018,35(1):27-35,9.基金项目
国家自然科学青年基金项目(31302013) （31302013）
河南省教育厅科学技术研究重点项目(13A2302812013) （13A2302812013）
河南科技大学博士启动基金项目(09001634) （09001634）
