Short-term effects of biochar on soil CO2 efflux in boreal Scots pine forests

• DOI: 10.1007/s13595-020-00960-2
• Publication Date: 2020-06-15T14:03:35Z
• Authors: Xudan Zhu; Tingting Zhu; Jukka Pumpanen; Marjo Palviainen; Xuan Zhou; Liisa Kulmala; Viktor J. Bruckman; Egle Köster; Kajar Köster; Heidi Aaltonen; Naoki Makita; Yixiang Wang; Frank Berninger
• Keywords: Scots pine; Soil carbon; Slash-and-char; Amendment

Abstract Key message During the first summer, wood biochar amendments increased soil temperature, pH, and CO 2 effluxes in a xeric boreal Scots pine forest. The increase of efflux could be largely explained by increases temperature. Higher application rates (1.0 vs 0.5 kg m −2 ) led to higher while pyrolysis temperature (500 or 650 °C) had no effect on efflux. Context Using as amendment has been proposed carbon sequestration soils. However, more rapid organic matter turnover after might reduce effectiveness applications for sequestration. By raising with lower contents labile carbohydrates can produced. Aims To better understand effects forest soil, we applied two spruce different temperatures °C at amounts 1.0 young southern Finland. Methods Soil , microbial biomass, physiochemical properties were measured track changes during summer. Results 14.3% treatments 4.6% . pH obviously treatments. Differences among disappear correcting moisture. Conclusion Biochar mainly short term. effluxes. may transient. More studies are needed get optimum amount