摘要
以大泥炭藓和喙叶泥炭藓为材料,研究遮阴对其生长及植物相互作用的影响.结果表明:在单种群中,遮阴处理明显促进了大泥炭藓的高生长,但对喙叶泥炭藓的生长以及大泥炭藓生物量和分枝数未产生影响;在混合群中,喙叶泥炭藓抑制了大泥炭藓生物量和分枝数的增长,而大泥炭藓对喙叶泥炭藓的生长无影响.随遮阴胁迫的增加,邻体对喙叶泥炭藓竞争加剧,当胁迫进一步增强,邻体效应有转变为正相互作用的趋势,但邻体对大泥炭藓的效应始终为竞争,未随胁迫增加而变化.
Taking Sphagnum palustre and S.fallax as test materials,this paper studied their growth and interactions under shading.In monoculture,shading promoted the height growth of S.palustre markedly,but had no effect on the growth of S.fallax and the biomass and branching of S.palustre.In mixed culture,S.fallax suppressed the increase of biomass and branching of S.palustre,while S.palustre had no effects on S.fallax.With the increase of shading stress,the competition of neighbour on S.fallax intensified.When the stress increased further,neighbor effect on S.fallax tended to be positive.However,the effect of neighbour on S.palustre was always competitive and did not change with the increase of shading stress.
出处
《应用生态学报》
CAS
CSCD
北大核心
2012年第2期357-362,共6页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(40971036
30700055
40830535)
环保公益性行业科研专项资金项目(201109067)资助
关键词
泥炭藓
遮阴
光竞争
正相互作用
胁迫梯度假说
Sphagnum
shading
light competition
positive interaction
stress gradient hypothesis.
