物候分化对天然草地群落生产力的影响  

Effects of phenophase differentiation on production of grassland community

作　　者：赵亮[1] 王芳[1] 杨志华 肖洪浪[1] 刘钟龄[3] 

机构地区：[1]中国科学院内陆河流域生态水文重点实验室,甘肃兰州730000 [2]锡林浩特气象局,内蒙古锡林浩特026000 [3]内蒙古大学生命科学学院,内蒙古呼和浩特010021

出　　处：《草业科学》2011年第6期1048-1051,共4页Pratacultural Science

基　　金：国家自然科学基金(40901019);国家科技支撑计划(2011BAC07B05);林业公益性行业科研专项(201004010-05)

摘　　要：物候期分化在草地群落中是普遍存在的,对草地群落多样性的维持具有重要作用,然而有关物候期分化对草地群落生产力影响的研究很少。对内蒙古天然草地群落为期两年的研究结果表明,在内蒙古天然草地群落不同恢复阶段均存在明显的物候期分化现象;随着恢复时间的延长,物候期分化程度的增加对天然草地群落初级生产力具有显著的促进作用,物候期分化程度与物种丰富度和物种均匀度呈显著正相关关系。Phenophase differentiation is common in grassland community and plays an important role in maintaining biodiversity.However,little attention was paid on the effects of phenophase differentiation on grassland production.The results from a 2-year experiment conducted in Inner Mongolia showed that there was an obvious phenophase differentiation in Inner Mongolia grassland community.As the restoration time extending,the degree of phenophase differentiation increased,and the primary production of natural grassland community was promoted;also,a positive significant correlation between phenophase differentiation degree and species richness and species evenness was observed.

关 键 词：退化恢复 物候期分化 生物多样性 初级生产力 

分 类 号：S812[农业科学—草业科学] Q948.15[农业科学—畜牧学]