Biochar application as a tool to decrease soil nitrogen losses (NH3 volatilization, N2 O emissions, and N leaching) from croplands : Options and mitigation strength in a global perspective

© 2019 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 25(2019), 6 vom: 07. Juni, Seite 2077-2093
1. Verfasser: Liu, Qi (VerfasserIn)
Weitere Verfasser: Liu, Benjuan, Zhang, Yanhui, Hu, Tianlong, Lin, Zhibin, Liu, Gang, Wang, Xiaojie, Ma, Jing, Wang, Hui, Jin, Haiyang, Ambus, Per, Amonette, James E, Xie, Zubin
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't N leaching N2O NH3 biochar machine learning spatial variability Manure Soil mehr... Charcoal 16291-96-6 Ammonia 7664-41-7 Nitrous Oxide K50XQU1029 Nitrogen N762921K75
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520 |a Biochar application to croplands has been proposed as a potential strategy to decrease losses of soil-reactive nitrogen (N) to the air and water. However, the extent and spatial variability of biochar function at the global level are still unclear. Using Random Forest regression modelling of machine learning based on data compiled from the literature, we mapped the impacts of different biochar types (derived from wood, straw, or manure), and their interactions with biochar application rates, soil properties, and environmental factors, on soil N losses (NH3 volatilization, N2 O emissions, and N leaching) and crop productivity. The results show that a suitable distribution of biochar across global croplands (i.e., one application of <40 t ha-1 wood biochar for poorly buffered soils, such as those characterized by soil pH<5, organic carbon<1%, or clay>30%; and one application of <80 t ha-1 wood biochar, <40 t ha-1 straw biochar, or <10 t ha-1 manure biochar for other soils) could achieve an increase in global crop yields by 222-766 Tg yr-1 (4%-16% increase), a mitigation of cropland N2 O emissions by 0.19-0.88 Tg N yr-1 (6%-30% decrease), a decline of cropland N leaching by 3.9-9.2 Tg N yr-1 (12%-29% decrease), but also a fluctuation of cropland NH3 volatilization by -1.9-4.7 Tg N yr-1 (-12%-31% change). The decreased sum of the three major reactive N losses amount to 1.7-9.4 Tg N yr-1 , which corresponds to 3%-14% of the global cropland total N loss. Biochar generally has a larger potential for decreasing soil N losses but with less benefits to crop production in temperate regions than in tropical regions 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a N leaching 
650 4 |a N2O 
650 4 |a NH3 
650 4 |a biochar 
650 4 |a machine learning 
650 4 |a spatial variability 
650 7 |a Manure  |2 NLM 
650 7 |a Soil  |2 NLM 
650 7 |a biochar  |2 NLM 
650 7 |a Charcoal  |2 NLM 
650 7 |a 16291-96-6  |2 NLM 
650 7 |a Ammonia  |2 NLM 
650 7 |a 7664-41-7  |2 NLM 
650 7 |a Nitrous Oxide  |2 NLM 
650 7 |a K50XQU1029  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Liu, Benjuan  |e verfasserin  |4 aut 
700 1 |a Zhang, Yanhui  |e verfasserin  |4 aut 
700 1 |a Hu, Tianlong  |e verfasserin  |4 aut 
700 1 |a Lin, Zhibin  |e verfasserin  |4 aut 
700 1 |a Liu, Gang  |e verfasserin  |4 aut 
700 1 |a Wang, Xiaojie  |e verfasserin  |4 aut 
700 1 |a Ma, Jing  |e verfasserin  |4 aut 
700 1 |a Wang, Hui  |e verfasserin  |4 aut 
700 1 |a Jin, Haiyang  |e verfasserin  |4 aut 
700 1 |a Ambus, Per  |e verfasserin  |4 aut 
700 1 |a Amonette, James E  |e verfasserin  |4 aut 
700 1 |a Xie, Zubin  |e verfasserin  |4 aut 
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