Soil biological nitrogen fixation is closely associated with soil ammonium nitrogen content in a mowing semiarid natural grassland

Soil biological nitrogen fixation is closely associated with soil ammonium nitrogen content in a mowing semiarid natural grassland

Soil biological nitrogen fixation (BNF) plays a significant role in N input in terrestrial ecosystems, and can be largely altered by management. In semi-arid region of Northern China, natural grasslands rely on soil BNF to maintain nitrogen input under long-mowing, but the effects of mowing on BNF r...

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Veröffentlicht in:Applied soil ecology : a section of Agriculture, ecosystems & environment ecosystems & environment, 2024-11, Vol.203, p.105690, Article 105690
Hauptverfasser: Liu, Jiaojiao, Liu, Jiayue, Wang, Shuwen, Fu, Qiang, Baoyin, Taogetao, Bao, Zhihua, Li, Frank Yonghong
Format: Artikel
Sprache:eng
Schlagworte:
ammonium nitrogen
China
DNA
genes
nifH gene abundance
nitrogen
nitrogen fixation
Nitrogen fixation activity per nifH gene
regression analysis
semiarid zones
soil
soil ecology
Soil nitrogen conditions
Soil nitrogen fixation
steppes
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Zusammenfassung:Soil biological nitrogen fixation (BNF) plays a significant role in N input in terrestrial ecosystems, and can be largely altered by management. In semi-arid region of Northern China, natural grasslands rely on soil BNF to maintain nitrogen input under long-mowing, but the effects of mowing on BNF remain unclear. Here we assessed the soil BNF rate and the nifH gene abundance in soil (0–10 cm) of the grasslands subject to long-term (19 years) annual mowing (MO) versus no mowing (NM) in a semiarid natural steppe grassland. Our results indicated that mowing significantly increased the BNF rate (P 
ISSN:0929-1393
DOI:10.1016/j.apsoil.2024.105690