Response of plant community structure and its stability to water and nitrogen addition in desert grassland

Desert grassland is predicted to be responsive to global climate change, such as increased atmospheric nitrogen deposition and precipitation. The structure, function and stability of plant community in desert grassland are often directly and indirectly affected by increased nitrogen deposition and p...

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Veröffentlicht in:Sheng tai xue bao 2021-01, Vol.41 (6), p.2359
Hauptverfasser: Du, Zhongyu, An, Hui, Wen, Zhilin, Wang, Bo, Zhang, Xinwen
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Sprache:chi
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Zusammenfassung:Desert grassland is predicted to be responsive to global climate change, such as increased atmospheric nitrogen deposition and precipitation. The structure, function and stability of plant community in desert grassland are often directly and indirectly affected by increased nitrogen deposition and precipitation. However, the response mechanism of plant community structure and stability in desert grassland to increase nitrogen deposition and precipitation are still not clear. We conducted the field experiments with water and nitrogen addition in desert grassland of Ningxia, China. We assessed the effects of increased atmospheric nitrogen deposition and precipitation on the plant community structure, species diversity and the plant community stability. The field experiment was conducted with four treatments, including control(CK), water addition(W), nitrogen addition(N), and water addition+nitrogen addition(W+N). We found that:(1) the plant community structure and aboveground biomass were effected significantly by water and nitrogen addition in desert grassland, but the plant community stability were not changed significantly(P>0.05). The plant aboveground biomass of Leguminosae and Gramineae were increased significantly by water addition(101.3% and 57.9%)(P
ISSN:1000-0933
DOI:10.5846/stxb202005251334