TY - JOUR
T1 - Sugarcane bagasse ash as fertilizer for soybeans
T2 - effects of added residues on ash composition, mineralogy, phosphorus extractability and plant availability
AU - Dombinov, Vitalij
AU - Herzel, Hannes
AU - Meiller, Martin
AU - Müller, Felix
AU - Willbold, Sabine
AU - Zang, Joachim W.
AU - da Fonseca-Zang, Warde A.
AU - Adam, Christian
AU - Klose, Holger
AU - Poorter, Hendrik
AU - Jablonowski, Nicolai D.
AU - Schrey, Silvia D.
N1 - Copyright the Author(s) 2022. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.
PY - 2022/12/8
Y1 - 2022/12/8
N2 - Sugarcane bagasse is commonly combusted to generate energy. Unfortunately, recycling strategies rarely consider the resulting ash as a potential fertilizer. To evaluate this recycling strategy for a sustainable circular economy, we characterized bagasse ash as a fertilizer and measured the effects of co-gasification and co-combustion of bagasse with either chicken manure or sewage sludge: on the phosphorus (P) mass fraction, P-extractability, and mineral P phases. Furthermore, we investigated the ashes as fertilizer for soybeans under greenhouse conditions. All methods in combination are reliable indicators helping to assess and predict P availability from ashes to soybeans. The fertilizer efficiency of pure bagasse ash increased with the ash amount supplied to the substrate. Nevertheless, it was not as effective as fertilization with triple-superphosphate and K2SO4, which we attributed to lower P availability. Co-gasification and co-combustion increased the P mass fraction in all bagasse-based ashes, but its extractability and availability to soybeans increased only when co-processed with chicken manure, because it enabled the formation of readily available Ca-alkali phosphates. Therefore, we recommend co-combusting biomass with alkali-rich residues to increase the availability of P from the ash to plants.
AB - Sugarcane bagasse is commonly combusted to generate energy. Unfortunately, recycling strategies rarely consider the resulting ash as a potential fertilizer. To evaluate this recycling strategy for a sustainable circular economy, we characterized bagasse ash as a fertilizer and measured the effects of co-gasification and co-combustion of bagasse with either chicken manure or sewage sludge: on the phosphorus (P) mass fraction, P-extractability, and mineral P phases. Furthermore, we investigated the ashes as fertilizer for soybeans under greenhouse conditions. All methods in combination are reliable indicators helping to assess and predict P availability from ashes to soybeans. The fertilizer efficiency of pure bagasse ash increased with the ash amount supplied to the substrate. Nevertheless, it was not as effective as fertilization with triple-superphosphate and K2SO4, which we attributed to lower P availability. Co-gasification and co-combustion increased the P mass fraction in all bagasse-based ashes, but its extractability and availability to soybeans increased only when co-processed with chicken manure, because it enabled the formation of readily available Ca-alkali phosphates. Therefore, we recommend co-combusting biomass with alkali-rich residues to increase the availability of P from the ash to plants.
KW - P-NMR spectroscopy
KW - combustion and gasification
KW - greenhouse experiments
KW - phosphate extractability and availability
KW - X-ray diffraction (XRD)
UR - http://www.scopus.com/inward/record.url?scp=85144924452&partnerID=8YFLogxK
U2 - 10.3389/fpls.2022.1041924
DO - 10.3389/fpls.2022.1041924
M3 - Article
C2 - 36570952
AN - SCOPUS:85144924452
SN - 1664-462X
VL - 13
SP - 1
EP - 13
JO - Frontiers in Plant Science
JF - Frontiers in Plant Science
M1 - 1041924
ER -