摘要
以青藏高原东部高寒草甸群落为研究对象,分析不同施肥处理下,高寒草甸植物群落物种多样性与生产力的关系。结果表明,当空间和时间尺度发生变化时,多样性与生产力的关系会随之发生一定的变化。总体模式为,在未施肥和施肥30 g/m2的条件下,多样性与生产力之间呈对数线性递增,在高施肥梯度的条件下,群落结构发生重大改变,多样性与生产力之间呈对数线性递减。在施肥120 g/m2的条件下,则很难预测生物多样性与生产力之间的关系。
Relationships of species diversity and productivity under the fertilization levels in alpine meadow of the Qinghai-Tibetan Plateau were analyzing by taking alpine meadow community as example. The results indicated that the relationships between specie diversity and productivity changes with temporal and spatial scales changes. Specie diversity and productivity showed loglinear increase under unfertilizing and 30 g/me (NH4) 2HPO4 conditions;high fertilizing levels condition,community structure present a significant change,specie diversity and productivity showed significant loglinear decrease. But there was not clear tendency under 120 g/m^2 fertilizing condition.
出处
《草原与草坪》
CAS
2008年第4期34-38,共5页
Grassland and Turf
基金
国家自然科学重大研究计划西部专项项目(90202009)资助
关键词
施肥
高寒草甸
物种多样性
生产力
fertilization
alpine meadow
specie diversity
productivity