草业学报Issue(8)：35-43,9.DOI:10.11686/cyxb2014369
青藏高原高寒草甸花期物候和群落结构对氮、磷、钾添加的短期响应
Short-term responses of flowering phenology and community structure to nitrogen, phosphorus and potassium in an alpine meadow on the Qinghai-Tibetan Plateau
摘要
Abstract
Fertilizers (N,P & K)were applied to a Kobresia humilis meadow at the Haibei Alpine Meadow E-cosystem Research Station to determine the effects of fertilizer on plant flowering phenology and community structure.Fertilizer application increased the effective accumulated soil temperature at 5 and 10 cm depth:ni-trogen>phosphorus>potassium>control treatment.The first floweing day and end flowering day was delayed in a number of plant species including Elymus nutans ,Agrostis hugoniana ,Poa crymophila ,Kobresia humi- <br> lis ,Carex atrofusca ,Scirpus distigmaticus and Saussurea superb (P <0.05),whereas in Potentilla anserine and Gentiana straminea flowering was advanced (P <0.05).Flowering duration in Gramineae was lower than in Cyperaceae and Forbs following fertilizer application.The application of nitrogen and phosphorus promoted the formation of a heterogeneous community.Heterogeneity,assessed using nonmetric multidimensional scal-ing,was lowest in control fertilizer treatments followed by potassium,phosphorus,and finally nitrogen appli-cation.It was concluded that E .nutans ,K .humilis ,G.straminea and S .superb were sensitive to the applica-tion of nitrogen and phosphorus in K .humilis meadow.关键词
施肥/始花期/终花期/非度量多维尺度分析/熵值法Key words
fertilization/first flowering day/end flowering day/nonmetric multidimensional scaling/entropy method引用本文复制引用
杨月娟,张灏,周华坤,叶鑫,姚步青,张春辉,马真,赵新全..青藏高原高寒草甸花期物候和群落结构对氮、磷、钾添加的短期响应[J].草业学报,2015,(8):35-43,9.基金项目
国家自然科学基金项目（31172247，31201836，31472135），青海省自然科学基金项目（2013-Z-916），国家科技支撑课题专题（2011BAC09B06-02，2012BAD13B01，2014BAC05B03），中科院战略性先导科技专项子课题（XDA05070202）和青海省重点实验室发展专项资金计划（2014-Z-Y01）资助。 （）
