TY - JOUR
T1 - The potential value of biochar in the mitigation of gaseous emission of nitrogen
AU - Thangarajan, Ramya
AU - Bolan, Nanthi S.
AU - Kunhikrishnan, Anitha
AU - Wijesekara, Hasintha
AU - Xu, Yilu
AU - Tsang, Daniel C.W.
AU - Song, Hocheol
AU - Ok, Yong Sik
AU - Hou, Deyi
N1 - Funding Information:
This research was partly supported by Australian Research Council Discovery Projects ( DP140100323 ). Appendix A
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/1/15
Y1 - 2018/1/15
N2 - Nitrogen (N) losses through gaseous emission of ammonia (NH3) and nitrous oxide (N2O) can contribute to both economic loss and environmental degradation. This study examined the effect of biochar and a chemical nitrification inhibitor, dicyandiamide (DCD), on N transformation and N losses via gaseous emission of NH3 and N2O from agricultural soils treated with a range of organic and inorganic N sources. The addition of DCD reduced N2O emission from both organic and inorganic N sources treated soils by 75%, but increased ammonium (NH4+) concentration and subsequently induced high NH3 emission from the soils. In contrast, the addition of biochar reduced both N2O and NH3 emissions from organic and inorganic N sources treated soils by 23% and 43%, respectively. The effectiveness of biochar and DCD in reducing NH3 volatilization and N2O emission depends on the nature of the N sources and their initial mineral N concentration. The study demonstrated that biochar can be used to mitigate N losses resulting from NH3 volatilization and N2O emission.
AB - Nitrogen (N) losses through gaseous emission of ammonia (NH3) and nitrous oxide (N2O) can contribute to both economic loss and environmental degradation. This study examined the effect of biochar and a chemical nitrification inhibitor, dicyandiamide (DCD), on N transformation and N losses via gaseous emission of NH3 and N2O from agricultural soils treated with a range of organic and inorganic N sources. The addition of DCD reduced N2O emission from both organic and inorganic N sources treated soils by 75%, but increased ammonium (NH4+) concentration and subsequently induced high NH3 emission from the soils. In contrast, the addition of biochar reduced both N2O and NH3 emissions from organic and inorganic N sources treated soils by 23% and 43%, respectively. The effectiveness of biochar and DCD in reducing NH3 volatilization and N2O emission depends on the nature of the N sources and their initial mineral N concentration. The study demonstrated that biochar can be used to mitigate N losses resulting from NH3 volatilization and N2O emission.
KW - Biochar
KW - Gaseous emission
KW - Nitrification inhibitors
KW - Nitrogen transformations
KW - Soil organic amendments
UR - http://www.scopus.com/inward/record.url?scp=85028089826&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2017.08.242
DO - 10.1016/j.scitotenv.2017.08.242
M3 - Article
C2 - 28850845
AN - SCOPUS:85028089826
SN - 0048-9697
VL - 612
SP - 257
EP - 268
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -