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@INPROCEEDINGS{RoblesAguilar:905063,
      author       = {Robles-Aguilar, A. A. and Grunert, O. and Meers, E. and
                      Jablonowski, N. D.},
      title        = {{E}ffect of recycled phosphorus and nitrogen blend
                      fertilizers on the growth of viola ( {V}iola cornuta {L}.)},
      journal      = {Acta horticulturae},
      number       = {1317},
      issn         = {0567-7572},
      address      = {The Hague},
      publisher    = {ISHS},
      reportid     = {FZJ-2022-00362},
      pages        = {223 - 230},
      year         = {2021},
      comment      = {PROCEEDINGS OF THE II International Symposium on Growing
                      Media, Soilless Cultivation, and Compost Utilization in
                      Horticulture},
      booktitle     = {PROCEEDINGS OF THE II International
                       Symposium on Growing Media, Soilless
                       Cultivation, and Compost Utilization in
                       Horticulture},
      abstract     = {Viola cornuta L. is an ornamental plant highly demanded in
                      horticulture. It is becoming more and more critical for
                      greenhouse growers to focus on sustainable production to
                      enhance plant quality, reducing negative environmental
                      impacts. Therefore, assessing the effect of recycled P and N
                      sources on the growth and quality of viola could become very
                      useful for producers and consumers. This experiment aimed to
                      determine the optimal fertiliser composition to grow viola
                      using recovered fertilizer products. The effect of applying
                      the recovered products as fertilizers on the growth of viola
                      was analyzed in a greenhouse trial under controlled
                      conditions at the Institute of Bio- and Geosciences, IBG-2:
                      Plant Sciences, Forschungszentrum Jülich GmbH, Germany.
                      Well rooted viola plugs grew in a standard peat-based
                      growing medium with a well-known fertilizer composition used
                      by the growing media industry (PGMIX14-16-18). Using
                      recycled sources of P and N (struvite and potassium
                      struvite, ammonium sulfate and ammonium nitrate), 15
                      fertilizer combinations were prepared and tested. Two
                      controls were used: i) a substrate without fertilizer and
                      ii) a slow-release commercial fertilizer (Osmocote 15+9+11+2
                      MgO and trace elements). Triple-superphosphate (TSP) and
                      potassium sulfate (K2SO4) were used together with the
                      recycled nutrients to fulfil the major macronutrient
                      requirements of viola. Plants treated with blends containing
                      the recovered ammonium nitrate showed healthy growth and
                      optimal plant N concentrations. In contrast, combinations
                      using the recovered ammonium-sulfate resulted in an
                      unacceptable increase in electrical conductivity affecting
                      the germination and growth of the plants. The combination of
                      struvite recovered ammonium nitrate and recovered
                      potassium-sulfate has the best chemical composition with
                      non-significant differences in the biomass from the positive
                      controls. Our results indicate that fertilizer blends with
                      recovered fertilizer products (P as struvite and N as
                      ammonium-nitrate) can substitute the use of mineral
                      fertilizer blends to grow ornamental plant species as
                      viola.},
      month         = {Aug},
      date          = {2021-08-22},
      organization  = {Proc. II Int. Symp. on Growing Media,
                       Soilless Cultivation, and Compost
                       Utilization in Hort., Ghent (Belgium),
                       22 Aug 2021 - 27 Aug 2021},
      cin          = {IBG-2},
      ddc          = {640},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {2171 - Biological and environmental resources for
                      sustainable use (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2171},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.17660/ActaHortic.2021.1317.25},
      url          = {https://juser.fz-juelich.de/record/905063},
}