TY  - JOUR
AU  - Cao, Xinyue
AU  - Reichel, Rüdiger
AU  - Wissel, Holger
AU  - Brüggemann, Nicolas
TI  - Improving nitrogen retention of cattle slurry with oxidized biochar: An incubation study with three different soils
JO  - Journal of environmental quality
VL  - 52
IS  - 1
SN  - 0047-2425
CY  - Hoboken, NJ
PB  - Wiley
M1  - FZJ-2023-00746
SP  - 1 - 12
PY  - 2023
AB  - The application of livestock slurry in soils can lead to nitrogen (N) losses through ammonia (NH3) emission or nitrate (NO3−) leaching. Oxidized biochar has great potential to mitigate N losses due to its strong adsorption capacity; however, the effects of oxidized biochar in different soils treated with slurry are currently unclear. Here, we investigated the effect of untreated and oxidized biochar (applied at a rate of 50 kg C m−3 slurry) on reducing N losses in a laboratory experiment with three different soils (loamy sand, sandy loam, loam) amended with cattle slurry at an application rate of 73 kg N ha−1. Oxidized biochar reduced NH3 emissions by 64–75% in all soils, whereas untreated biochar reduced NH3 emissions by 61% only in the loamy sand. Oxidized biochar significantly reduced the NO3− content in the soil solution of the loamy sand in the early phase of the incubation and led to a significantly higher NO3− concentration in the same soil compared with the slurry-only treatment at the end of the experiment, indicating a significant increase in NO3− retention in this organic C–poor soil. We conclude that oxidized biochar can reduce N losses, both in the form of NH3 emission and NO3− leaching, from cattle slurry applied to soil, particularly in soil with soil organic carbon content <1% and pH <5 (i.e., oxidized biochar can serve as a means for improving the quality of marginal and acidic soils).
LB  - PUB:(DE-HGF)16
C6  - 36327389
UR  - <Go to ISI:>//WOS:000881855100001
DO  - DOI:10.1002/jeq2.20424
UR  - https://juser.fz-juelich.de/record/917543
ER  -