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Effects of nitrogen addition on plant functional traits in freshwater wetland of Sanjiang Plain, Northeast China |
论文题目:
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Effects of nitrogen addition on plant functional traits in freshwater wetland of Sanjiang Plain, Northeast China
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英文论文题目:
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Effects of nitrogen addition on plant functional traits in freshwater wetland of Sanjiang Plain, Northeast China
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第一作者:
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毛瑢
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英文第一作者:
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Mao, R.
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联系作者:
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毛瑢
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英文联系作者:
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Mao, R.
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发表年度:
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2014
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卷:
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24
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期:
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6
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页码:
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674-681
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摘要:
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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/(m(2)center dot yr), 6 g N/(m(2)center dot yr), 12 g N/(m(2)center dot yr) and 24 g N/(m(2)center dot 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.
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英文摘要:
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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/(m(2)center dot yr), 6 g N/(m(2)center dot yr), 12 g N/(m(2)center dot yr) and 24 g N/(m(2)center dot 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.
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刊物名称:
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Chinese Geographical Science
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英文刊物名称:
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Chinese Geographical Science
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参与作者:
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张新厚,宋长春
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英文参与作者:
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Zhang, X. H., Song, C. C.
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