Carbon emissions and priming effects derived from crop residues and their responses to nitrogen inputs

Carbon emissions and priming effects derived from crop residues and their responses to nitrogen inputs

© 2024 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 30(2024), 1 vom: 04. Jan., Seite e17115
1. Verfasser: Qin, Jianjun (VerfasserIn)
Weitere Verfasser: Chen, Na, Scriber, Kevin E 2nd, Liu, Jinbo, Wang, Zhiqiang, Yang, Kangjie, Yang, Huiqiang, Liu, Fuhao, Ding, Yuanyuan, Latif, Junaid, Jia, Hanzhong
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Meta-Analysis Journal Article crop residue cropland net carbon balance nitrogen priming effect soil organic carbon Soil Carbon mehr... 7440-44-0 Nitrogen N762921K75
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520 |a Crop residue-derived carbon (C) emissions and priming effects (PE) in cropland soils can influence the global C cycle. However, their corresponding generality, driving factors, and responses to nitrogen (N) inputs are poorly understood. As a result, the total C emissions and net C balance also remain mysterious. To address the above knowledge gaps, a meta-analysis of 1123 observations, taken from 51 studies world-wide, has been completed. The results showed that within 360 days, emission ratios of crop residues C (ER) ranged from 0.22% to 61.80%, and crop residues generally induced positive PE (+71.76%). Comparatively, the contribution of crop residue-derived C emissions (52.82%) to total C emissions was generally higher than that of PE (12.08%), emphasizing the importance of reducing ER. The ER and PE differed among crop types, and both were low in the case of rice, which was attributed to its saturated water conditions. The ER and PE also varied with soil properties, as PE decreased with increasing C addition ratio in soils where soil organic carbon (SOC) was less than 10‰; in contrast, the opposite phenomenon was observed in soils with SOC exceeding 10‰. Moreover, N inputs increased ER and PE by 8.31% and 3.78%, respectively, which was predominantly attributed to (NH4 )2 SO4 . The increased PE was verified to be dominated by microbial stoichiometric decomposition. In summary, after incorporating crop residues, the total C emissions and relative net C balance in the cropland soils ranged from 0.03 to 23.47 mg C g-1 soil and 0.21 to 0.97 mg C g-1 residue-C g-1 soil, respectively, suggesting a significant impact on C cycle. These results clarify the value of incorporating crop residues into croplands to regulate global SOC dynamics and help to establish while managing site-specific crop return systems that facilitate C sequestration 
650 4 |a Meta-Analysis 
650 4 |a Journal Article 
650 4 |a crop residue 
650 4 |a cropland 
650 4 |a net carbon balance 
650 4 |a nitrogen 
650 4 |a priming effect 
650 4 |a soil organic carbon 
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650 7 |a Carbon  |2 NLM 
650 7 |a 7440-44-0  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
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700 1 |a Chen, Na  |e verfasserin  |4 aut 
700 1 |a Scriber, Kevin E  |c 2nd  |e verfasserin  |4 aut 
700 1 |a Liu, Jinbo  |e verfasserin  |4 aut 
700 1 |a Wang, Zhiqiang  |e verfasserin  |4 aut 
700 1 |a Yang, Kangjie  |e verfasserin  |4 aut 
700 1 |a Yang, Huiqiang  |e verfasserin  |4 aut 
700 1 |a Liu, Fuhao  |e verfasserin  |4 aut 
700 1 |a Ding, Yuanyuan  |e verfasserin  |4 aut 
700 1 |a Latif, Junaid  |e verfasserin  |4 aut 
700 1 |a Jia, Hanzhong  |e verfasserin  |4 aut 
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773 1 8 |g volume:30  |g year:2024  |g number:1  |g day:04  |g month:01  |g pages:e17115 
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