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- Title
Sawdust biochar application to rice paddy field: reduced nitrogen loss in floodwater accompanied with increased NH<sub>3</sub> volatilization.
- Authors
Feng, Yanfang; Sun, Haijun; Xue, Lihong; Wang, Yueman; Yang, Linzhang; Shi, Weiming; Xing, Baoshan
- Abstract
Sawdust biochar (SDB) was for the first time applied to rice paddy field to evaluate its effects on potential nitrogen (N) runoff and ammonia (NH3) volatilization losses in a soil column experimental system. Results showed that total N concentration of surface floodwater under SDB treatments was reduced by 7.29-35.16, 16.34-32.35, and 12.21-28.12% after three split N fertilizations, respectively. Particularly, NH4+-N was decreased by 11.84-27.08, 14.29-36.50, and 2.97-19.64%, respectively. However, SDB addition has no significant influence on NO3−-N concentration. Meanwhile, SDB application increased NH4+-N and total N content of top (0-15 cm) soil. Furthermore, these SDB-induced influences were more pronounced for 3 wt% SDB treatments. SDB treatments recorded 3.56-5.78 kg ha−1 higher NH3 volatilization than urea control treatment, which was attributed to the elevated pH values of floodwater and top soil induced by SDB. Fortunately, the yield-scale NH3 volatilization was not increased dramatically.
- Subjects
BIOCHAR; PADDY fields; NITROGEN in agriculture; AMMONIA; NONPOINT source pollution; FERTILIZERS
- Publication
Environmental Science & Pollution Research, 2018, Vol 25, Issue 9, p8388
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-017-1059-y