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Title: Biochar application as a tool to decrease soil nitrogen losses (NH3 volatilization, N2O emissions, and N leaching) from croplands: Options and mitigation strength in a global perspective

Abstract

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, N2O 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 N2O 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 NH3more » 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.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1];  [1];  [3];  [4];  [1]
  1. Institute of Soil Science, Chinese Academy of Sciences
  2. Chinese Academy of Sciences
  3. University of Copenhagen
  4. BATTELLE (PACIFIC NW LAB)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1530835
Report Number(s):
PNNL-SA-127766
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Global Change Biology
Additional Journal Information:
Journal Volume: 25; Journal Issue: 6
Country of Publication:
United States
Language:
English
Subject:
biochar, soil amendment, nitrogen cycle, climate change mitigation, crop production, N2O emissions

Citation Formats

Liu, Qi, Liu, Benjuan, Zhang, Yanhui, Hu, Tianlong, Lin, Zhibin, Liu, Gang, Wang, Xiaojie, Ma, Jing, Wang, Hui, Jin, Haiyang, Ambus, Per L., Amonette, James E., and Xie, Zubin. Biochar application as a tool to decrease soil nitrogen losses (NH3 volatilization, N2O emissions, and N leaching) from croplands: Options and mitigation strength in a global perspective. United States: N. p., 2019. Web. doi:10.1111/gcb.14613.
Liu, Qi, Liu, Benjuan, Zhang, Yanhui, Hu, Tianlong, Lin, Zhibin, Liu, Gang, Wang, Xiaojie, Ma, Jing, Wang, Hui, Jin, Haiyang, Ambus, Per L., Amonette, James E., & Xie, Zubin. Biochar application as a tool to decrease soil nitrogen losses (NH3 volatilization, N2O emissions, and N leaching) from croplands: Options and mitigation strength in a global perspective. United States. doi:10.1111/gcb.14613.
Liu, Qi, Liu, Benjuan, Zhang, Yanhui, Hu, Tianlong, Lin, Zhibin, Liu, Gang, Wang, Xiaojie, Ma, Jing, Wang, Hui, Jin, Haiyang, Ambus, Per L., Amonette, James E., and Xie, Zubin. Mon . "Biochar application as a tool to decrease soil nitrogen losses (NH3 volatilization, N2O emissions, and N leaching) from croplands: Options and mitigation strength in a global perspective". United States. doi:10.1111/gcb.14613.
@article{osti_1530835,
title = {Biochar application as a tool to decrease soil nitrogen losses (NH3 volatilization, N2O emissions, and N leaching) from croplands: Options and mitigation strength in a global perspective},
author = {Liu, Qi and Liu, Benjuan and Zhang, Yanhui and Hu, Tianlong and Lin, Zhibin and Liu, Gang and Wang, Xiaojie and Ma, Jing and Wang, Hui and Jin, Haiyang and Ambus, Per L. and Amonette, James E. and Xie, Zubin},
abstractNote = {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, N2O 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 N2O 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.},
doi = {10.1111/gcb.14613},
journal = {Global Change Biology},
number = 6,
volume = 25,
place = {United States},
year = {2019},
month = {6}
}

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