摘要
研究了退化多年生黑麦草与白三叶混播人工草地的地上生物量、密度、盖度及物种多样性变化规律 ,探讨了退化演替的物种替代机制及恢复演替模式。结果表明 ,物种多样性和均匀性随着退化演替而增大 ,生态优势度则减小 ;在演替过程中群落主要种的优势地位发生明显的替代变化 ,这与其相互之间对生存空间、养分的竞争及生态生物学特性和家畜的采食行为密切相关。
A mixed artificial grassland of perennial ryegrass and white clover in the degradation succession process was analyzed on the basis of aboveground biomass, density, coverage and species diversity. Mechanisms of species replacement and models of succession were also explored. The results showed: Species diversity and homogeneity increase as the degradation succession proceeds, and community dominance decreases. Throughout the succession process, changes in the dominant plant population were closely related to competition for space, nutrition, the eco biological characteristics of the competing plant, and the grazing behavior of domestic animals.
出处
《中国草地》
CSCD
2000年第2期8-14,共7页
Grassland of China
基金
农业部"九五"畜牧业重点科研计划专题研究项目!(专题编号 :95牧 - 0 2 - 0 7- 0 6 )
关键词
人工草地
退化
物种多样性
演替机制
混播草地
Artificial grassland
\ Degradation succession
\ Diversity of species
\ Succession mechanism
