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@PHDTHESIS{Dombinov:888885,
      author       = {Dombinov, Vitalij},
      title        = {{F}rom {L}ab to {F}ield - {I}nvestigations of {P}hosphorus
                      {A}vailability from {S}ugarcane {B}agasse {A}sh to
                      {S}oybeans},
      school       = {Rheinische friedrich-Wilhelms-Universität Bonn},
      type         = {Dissertation},
      reportid     = {FZJ-2020-05290},
      pages        = {110},
      year         = {2020},
      note         = {The research was conducted in the framework of the project
                      ASHES and funded by the German Federal Ministry of Education
                      and Research (BMBF, grand number 031A288).; Dissertation,
                      Rheinische friedrich-Wilhelms-Universität Bonn, 2020},
      abstract     = {Every year the Brazilian sugarcane industry generates up to
                      10 million tons (dry matter) of ash from the combustion of
                      sugarcane bagasse, which is a fibrous plant material that
                      remains after sugarcane juice extraction. Bagasse ash is
                      alkaline and contains minerals, including phosphorus (P) and
                      potassium (K). Bagasse ash as a P-fertilizer has been poorly
                      investigated. The experiments conducted and presented in
                      this dissertation were aimed at investigating the
                      fertilization effects of bagasse and bagasse-based ashes
                      following a “From Lab to Field” approach. Soybean
                      (Glycine max) was chosen as a model plant because of its
                      suitability for greenhouse and field experiments, relevance
                      for the Brazilian economy and use as rotation crop after
                      sugarcane harvest. The aims of the present study were i) to
                      investigate the efficiency of bagasse ash as a fertilizer
                      for soybeans, ii) to identify factors integral to its
                      fertilization success, and iii) to analyse the potential of
                      bagasse ash as an additive to conventional and organic
                      fertilizers under field conditions. In greenhouse pot
                      experiments on nutrient-poor substrate, soybeans fertilized
                      with bagasseashes accumulated significantly less dry matter
                      and took up less P and K than from triplesuperphosphate
                      (TSP) and potassium sulphate. The fertilization effects of
                      bagasse ashes were driven by the availability of P, a result
                      supported by solubility analyses in various extraction
                      solutions. The application of large dosages of ash produced
                      comparable amounts of biomass as TSP-fertilized plants, but
                      the uptake of P remained significantly lower than that from
                      TSP. This is potentially related to suboptimal
                      concentrations and ratios of minerals supplied by large
                      dosages of ash. Co-combustion of bagasse with chicken
                      manure, which is poor in Fe and Al but rich in alkali and
                      alkaline earth metals, altered the physical and chemical
                      composition of the ashes and their thermochemical products.
                      The resulting increase in availability of P to soybeans
                      appears to be due to the formation of Ca-alkali phosphates,
                      as determined by X-ray diffraction analyses. Under
                      greenhouse conditions in Oxisol soil, the P-fertilization
                      effects of bagasse-based ash and its thermochemical products
                      on soybean remained significantly lower than from TSP. This
                      was probably due tofewer soluble P-forms in ash as compared
                      to TSP, an increase in pH and suboptimal nutrient ratios and
                      nutrient concentrations; all of which affected the ability
                      of this fertilizer to meet the P demand for soybeans. Under
                      field conditions (Goiânia, Brazil), co-fertilization of
                      soybeans with bagasse ash and TSP $(70\%$ of P from bagasse
                      ash) allowed a reduction in the P2O5 consumption from TSP by
                      more than $50\%$ and increased the grain yield by $11\%.$
                      TSP-free fertilization of soybeans with 80 kg P2O5 in form
                      of bagasse ash and cattle manure compost $(50\%$ of P from
                      bagasse ash) increased the grain yield by $13\%.$ Both
                      increases are in comparison to control fertilization using
                      TSP alone. Overall, fertilization effects of bagasse and
                      bagasse-based ashes cannot compete with TSP. However, using
                      bagasse ash as an additive to conventional and organic
                      fertilizer has the potential to reduce the consumption of
                      rock-P based fertilizer for soybeans in the field.},
      cin          = {IBG-2},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {582 - Plant Science (POF3-582)},
      pid          = {G:(DE-HGF)POF3-582},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/888885},
}