北京师范大学学报（自然科学版）2016，Vol.52Issue(1)：32-38,7.DOI:10.16360/j.cnki.jbnuns.2016.01.009
内蒙古克氏针茅草地主要植物叶片功能性状对氮素添加的响应
Leaf functional trait response to nitrogen addition of abundant species in an Inner Mongolia Stipa steppe
摘要
Abstract
Increasing nitrogen deposition imposes dramatic effect on plant functional traits,and changes the structure of plant community.To investigate how species nitrogen utility strategy shifts across nitrogen gradient,we conducted analyses of functional traits of 5 abundant species from Inner Mongolia grassland in a six-year nitrogen addition experiment.Increasing nitrogen addition led to increased individual plant height,leaf area,specific leaf area,leaf nitrogen and phosphorus contents,but decreased leaf dry matter content,probably to improve competition for light resources.These results suggest that increased nitrogen addition led the plant investment strategy to change from low to quick return of nutrients and dry mass.Biomass of grassland community,and of Stipakrylovii,Carexkorshinskyi and Agropyroncristatum,showed no corerelation with nitrogen addition, but biomass of Artemisia frigida and Potentilla acaulis significantly decreased upon nitrogen addition.These results suggest that increasing nitrogen deposition had important effect on plant functional traits,and changed the structure of plant community.This study gives a better insight to understand plant response to nitrogen deposition and mechanism of community succession.关键词
氮素添加/草地植物/生物量/功能性状Key words
nitrogen addition/grassland plants/biomass/functional traits分类
农业科技引用本文复制引用
王萌,徐冰,张大勇,朱璧如..内蒙古克氏针茅草地主要植物叶片功能性状对氮素添加的响应[J].北京师范大学学报（自然科学版）,2016,52(1):32-38,7.基金项目
国家重点基础研究发展计划(973计划)基金资助项目(2007CB106802) （973计划）
