Vital roles of soil microbes in driving terrestrial nitrogen immobilization

Vital roles of soil microbes in driving terrestrial nitrogen immobilization

© 2021 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 27(2021), 9 vom: 03. Mai, Seite 1848-1858
1. Verfasser: Li, Zhaolei (VerfasserIn)
Weitere Verfasser: Zeng, Zhaoqi, Song, Zhaopeng, Wang, Fuqiang, Tian, Dashuan, Mi, Wenhai, Huang, Xin, Wang, Jinsong, Song, Lei, Yang, Zhongkang, Wang, Jun, Feng, Haojie, Jiang, Lifen, Chen, Ye, Luo, Yiqi, Niu, Shuli
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article croplands global change microbial biomass nitrogen immobilization soil nitrogen retention Soil Carbon 7440-44-0 Nitrogen N762921K75
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520 |a Nitrogen immobilization usually leads to nitrogen retention in soil and, thus, influences soil nitrogen supply for plant growth. Understanding soil nitrogen immobilization is important for predicting soil nitrogen cycling under anthropogenic activities and climate changes. However, the global patterns and drivers of soil nitrogen immobilization remain unclear. We synthesized 1350 observations of gross soil nitrogen immobilization rate (NIR) from 97 articles to identify patterns and drivers of NIR. The global mean NIR was 8.77 ± 1.01 mg N kg-1  soil day-1 . It was 5.55 ± 0.41 mg N kg-1  soil day-1 in croplands, 15.74 ± 3.02 mg N kg-1  soil day-1 in wetlands, and 15.26 ± 2.98 mg N kg-1  soil day-1 in forests. The NIR increased with mean annual temperature, precipitation, soil moisture, soil organic carbon, total nitrogen, dissolved organic nitrogen, ammonium, nitrate, phosphorus, and microbial biomass carbon. But it decreased with soil pH. The results of structural equation models showed that soil microbial biomass carbon was a pivotal driver of NIR, because temperature, total soil nitrogen, and soil pH mostly indirectly influenced NIR via changing soil microbial biomass. Moreover, microbial biomass carbon accounted for most of the variations in NIR among all direct relationships. Furthermore, the efficiency of transforming the immobilized nitrogen to microbial biomass nitrogen was lower in croplands than in natural ecosystems (i.e., forests, grasslands, and wetlands). These findings suggested that soil nitrogen retention may decrease under the land use change from forests or wetlands to croplands, but NIR was expected to increase due to increased microbial biomass under global warming. The identified patterns and drivers of soil nitrogen immobilization in this study are crucial to project the changes in soil nitrogen retention 
650 4 |a Journal Article 
650 4 |a croplands 
650 4 |a global change 
650 4 |a microbial biomass 
650 4 |a nitrogen immobilization 
650 4 |a soil nitrogen retention 
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700 1 |a Zeng, Zhaoqi  |e verfasserin  |4 aut 
700 1 |a Song, Zhaopeng  |e verfasserin  |4 aut 
700 1 |a Wang, Fuqiang  |e verfasserin  |4 aut 
700 1 |a Tian, Dashuan  |e verfasserin  |4 aut 
700 1 |a Mi, Wenhai  |e verfasserin  |4 aut 
700 1 |a Huang, Xin  |e verfasserin  |4 aut 
700 1 |a Wang, Jinsong  |e verfasserin  |4 aut 
700 1 |a Song, Lei  |e verfasserin  |4 aut 
700 1 |a Yang, Zhongkang  |e verfasserin  |4 aut 
700 1 |a Wang, Jun  |e verfasserin  |4 aut 
700 1 |a Feng, Haojie  |e verfasserin  |4 aut 
700 1 |a Jiang, Lifen  |e verfasserin  |4 aut 
700 1 |a Chen, Ye  |e verfasserin  |4 aut 
700 1 |a Luo, Yiqi  |e verfasserin  |4 aut 
700 1 |a Niu, Shuli  |e verfasserin  |4 aut 
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773 1 8 |g volume:27  |g year:2021  |g number:9  |g day:03  |g month:05  |g pages:1848-1858 
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