Effects of Nitrogen Addition on Plant Functional Traits in Freshwater Wetland of Sanjiang Plain,Northeast China

被引:0
|
作者
MAO Rong [1 ,2 ]
ZHANG Xinhou [1 ]
SONG Changchun [1 ]
机构
[1] Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences
[2] Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Ministry of Land and Resources of China
关键词
nitrogen addition; Deyeuxia angustifolia; Glyceria spiculosa; leaf chemical traits; leaf morphological traits; whole-plant traits; Sanjiang Plain;
D O I
暂无
中图分类号
Q948.8 [水生植物学];
学科分类号
摘要
To clarify the responses of plant functional traits to nitrogen(N) enrichment, we investigated the whole-plant traits(plant height and aboveground biomass), leaf morphological(specific leaf area(SLA) and leaf dry mass content(LDMC)) and chemical traits(leaf N concentration(LNC) and leaf phosphorus(P) concentration(LPC)) of Deyeuxia angustifolia and Glyceria spiculosa following seven consecutive years of N addition at four rates(0 g N/(m2·yr), 6 g N/(m2·yr), 12 g N/(m2·yr) and 24 g N/(m2·yr)) in a freshwater marsh in the Sanjiang Plain, Northeast China. The results showed that, for both D. angustifolia and G. spiculosa, N addition generally increased plant height, leaf, stem and total aboveground biomass, but did not cause changes in SLA and LDMC. Moreover, increased N availability caused an increase in LNC, and did not affect LPC. Thus, N addition decreased leaf C∶N ratio, but caused an increase in leaf N∶P ratio, and did not affect leaf C∶P ratio. Our results suggest that, in the mid-term, elevated N loading does not alter leaf morphological traits, but causes substantial changes in whole-plant traits and leaf chemical traits in temperate freshwater wetlands. These may help to better understand the effects of N enrichment on plant functional traits and thus ecosystem structure and functioning in freshwater wetlands.
引用
收藏
页码:674 / 681
页数:8
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