|
|
|
|
| |
|
|
| Wollmann, Iris; Gauro, Ajay; Müller, Torsten; Möller, Kurt. |
| Six phosphorus (P) fertilizers recycled from sewage sludge [Struvite SSL, Struvite AirPrex,P-RoC, Mephrec, Pyrolysis coal and Ash (Mg-SSA)] were tested for their plant availability in potted soil of pH 7.2 under greenhouse conditions. The crop sequence simulated a rotation of red clover (Trifolium pratense L.), maize (Zea maize L.), and ryegrass (Lolium perenne L.). Other P fertilizer treatments included: Phosphate Rock (PR), Calcium dihydrogen phosphate [Ca(H2PO4)2], and an unfertilized control. Additionally, soil was regularly inoculated with two strains of plant growth-promoting rhizobacteria (PGPR; Pseudomonas sp. Proradix, and Bacillus amyloliquefaciens) to test their ability to increase P availability to plants. Sequential P fractionation was... |
| Tipo: Journal paper |
Palavras-chave: Composting and manuring; Nutrient turnover. |
| Ano: 2018 |
URL: http://orgprints.org/32921/1/Wollmann2017-Phosphorus%20bioavailability%20of%20sewage%20sludge-based%20recycled%20fertilizers.pdf |
| |
|
|
| Benke, Anna Pia; Rieps, Ann; Wollmann, Iris; Petrova, Ioana; Zikeli, Sabine; Möller, Kurt. |
| In temperate regions, legume-based green manures are a key element of organic rotations. However, specialized farms lack sufficient mobile organic fertilizers. To gain a better understanding of the N flows and the nitrogen (N) and phosphorus (P) fertilizer value of different clover-grass-based fertilizers (biogas digestate, compost, silage and fresh clover-grass obtained from clover grass ley biomass), we assessed their fertilizer value. Nitrogen and P offtake by the ryegrass was used to assess the shortterm effects. The data were completed using model calculations to assess the field-to-field N-transfer efficiencies and the overall N-transfer efficiencies. The greatest plant N offtake was achieved with digestates (64%) and the lowest from the compost... |
| Tipo: Journal paper |
Palavras-chave: Composting and manuring; Nutrient turnover. |
| Ano: 2017 |
URL: http://orgprints.org/32675/1/Benke2017-Fertilizer%20value%20and%20nitrogen%20transfer%20efficiencies%20with%20clover-grass%20ley%20biomass%20based%20fertilizers.pdf |
| |
|
|
| Möller, Kurt; Oberson, Astrid; Bünemann, Else K.; Cooper, Julia; Friedel, Jürgen K.; Glaesner, Nadia; Hörtenhuber, Stefan; Løes, Anne-Kristin; Mäder, Paul; Meyer, Gregor; Müller, Torsten; Symanczik, Sarah; Weissengruber, Lina; Wollmann, Iris; Magid, Jakob. |
| Phosphorus (P) is an essential element for all living organisms. At the current rate of extraction, global reserves of mineable deposits will be exhausted within the next few centuries. This publication aims to summarize the current knowledge on P recycling for organic farming. The evaluation of recycled P fertilizers (RPFs) includes (i) a chemical characterization, (ii) assessment of their plant P availability and added effects in the soil, (iii) life cycle assessments, (iv) a risk assessment of their long-term impacts on soil pollution, and (v) the compilation of other environmental impacts of different treatment approaches to produce RPFs. The highest nutrient recovery rates for P are achieved by rather simple process approaches of P recycling, while... |
| Tipo: Book chapter |
Palavras-chave: Composting and manuring; Nutrient turnover. |
| Ano: 2018 |
URL: http://orgprints.org/32661/1/Moeller-etal-2018-Advances_in_Agronomy-vol147-chapter4-p159-237-article-in-press.pdf |
| |
|
|
| Wollmann, Iris; Möller, Kurt. |
| Phosphorus is an essential, non-substitutable nutrient for all living organisms, and global resources are getting depleted. Cycling of nutrients is a main principle in organic farming, which can make P fertilizers recycled from sewage sludge a suitable alternative. Several Recycling P fertilizers from sewage sludge processing, combined with two different Bioeffector products, were investigated for their P availability in pot experiments with red clover and maize. No significant effects could be shown due to Bioeffector applications. Promising effects of Recycling P-fertilizers could be shown concerning dry matter and plant P-uptake for both maize and red clover. Treatments with struvite reached values comparable with the superphosphate control while sewage... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general; Nutrient turnover; Crop husbandry. |
| Ano: 2015 |
URL: http://orgprints.org/27194/1/27194_wollmann.pdf |
| |
|
|
|
