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| Koch, Robert; Emmel, M.; Lohr, D.; Frankenberg, Andrea; Degen, B.; Meinken, E.; Haas, HP.; Fischinger, Stephanie. |
| Matching nitrogen demand of plants and N release of organic fertilizers with respect to amount and timing is one key for successful cultivation of organic ornamentals. Thereby for plants with a low to moderate N demand growers can add the fertilizer as complete preplant application (CPA). For plants with a high N demand splitting fertilization in a reduced preplant application combined with an additional fertigation (RPA+F) is preferable. Aim of the current research was the investigation of N release of organic fertilizers in incubation experiments. Results of the incubation experiment were linked to a pot trial with pelargonium. Incubation experiments reveal that most fertilizers release about 40 to 50 % of total N and most nitrogen is released within... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Air and water emissions. |
| Ano: 2017 |
URL: http://orgprints.org/31877/1/Organische%20D%C3%BCnger%20in%20Topfkulturen%20auf%20dem%20Pr%C3%BCfstand%20-.pdf |
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| Leong, KI; Lohr, D.; von Tucher, Sabine; Meinken, E.. |
| P-recycling from biogas residue may play a future key role for sustainable P supply in organic farming. However, in particular transportation costs of residue need to be reduced e.g. by pretreatment. One approach is carbonization by pyrolysis or hydrothermal carbonization (HTC). In a pot trial with maize on a P-deficient, acidic sandy loam P uptake after application of two chars from pyrolysis (400 and 700 °C) and HTC (6 and 8 h dwell time) all made of the same residue was compared to P uptake after application of the raw residue and water soluble KH2PO4 respectively. P uptake was the same for KH2PO4, raw residue and both HTC treatments, but was significant lower in treatments with pyrolytic chars. Neither dwell time nor temperature had an effect.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover. |
| Ano: 2017 |
URL: http://orgprints.org/31557/1/Phosphord%C3%BCngewirkung%20karbonisierter%20Biogasg%C3%A4rreste.pdf |
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