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@ARTICLE{RoblesAguilar:905294,
      author       = {Robles-Aguilar, Ana A. and Grunert, Oliver and Meers, Erik
                      and Jablonowski, Nicolai D.},
      title        = {{E}valuating the {F}ertilising {P}otential of {B}lended
                      {R}ecovered {N}utrients in {H}orticultural {G}rowing
                      {M}edium on {V}iola x wittrockiana {L}.},
      journal      = {Agronomy},
      volume       = {12},
      number       = {1},
      issn         = {2073-4395},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2022-00565},
      pages        = {182 -},
      year         = {2022},
      abstract     = {Viola x wittrockiana L. is an ornamental plant in high
                      demand in horticulture. It is becoming more critical for
                      greenhouse growers to focus on sustainable production to
                      enhance plant quality while reducing negative environmental
                      impacts. Therefore, assessing the effect of recycled
                      phosphorous (P) and nitrogen (N) sources on the growth of
                      viola could become very useful for producers in terms of
                      sustainability. This experiment analysed the optimal
                      fertiliser composition to grow viola using recovered
                      fertilisers in a greenhouse trial under controlled
                      conditions. Well-rooted viola plugs were grown in a standard
                      peat-based growing medium. Using recycled sources of P and N
                      as struvite and potassium struvite, ammonium sulphate, and
                      ammonium nitrate, 14 fertiliser blends were prepared,
                      tested, and compared with the slow-release commercial
                      fertiliser Osmocote. Plants treated with ammonium nitrate
                      showed healthy growth and optimal plant N concentrations. In
                      contrast, most blends using the recovered ammonium sulphate
                      resulted in an unacceptable increase of ammonium
                      concentrations in the growing medium. The combination of
                      ammonium sulphate and potassium sulphate caused an increase
                      in the electrical conductivity in the growing medium,
                      negatively affecting plant growth. However, blend 13
                      containing struvite, ammonium sulphate and potassium
                      struvite expressed the best chemical composition with
                      non-significant differences in the biomass from the positive
                      controls, as it reduced the amount of potassium sulphate
                      needed. Our results indicate that fertiliser blends
                      containing P as struvite, N as ammonium nitrate or reduced
                      amount of ammonium sulphate, and K as potassium struvite can
                      substitute the use of mineral fertiliser blends to grow
                      ornamental plant species as viola.},
      cin          = {IBG-2},
      ddc          = {640},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {2172 - Utilization of renewable carbon and energy sources
                      and engineering of ecosystem functions (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2172},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000747626600001},
      doi          = {10.3390/agronomy12010182},
      url          = {https://juser.fz-juelich.de/record/905294},
}