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Fortschrittsbericht zum Forschungsprojekt Peat-free substrates – Berichtszeitraum April 2025 bis September 2025
No full textMethodical investigations to determine the effects of an elemental sulfur application on pH and gaseous nitrogen emissions during composting of green waste
No full textZukunftsdiskurse und agrarische Praxis. Zur Relevanz der landwirtschaftlichen Identität in der Transformation
No full textIn seinem Beitrag »Zukunftsdiskurse und agrarische Praxis. Zur Relevanz
der landwirtschaftlichen Identität in der Transformation« geht Matthias Kussin
der Frage nach, warum agrarische Zukunftsdiskurse in der landwirtschaftlichen Praxis bislang nur begrenzt Resonanz finden. Ausgangspunkt ist die Beobachtung, dass die Idee des landwirtschaftlichen Hofes weiterhin eine
zentrale Rolle bei der Ausbildung von Zukunftserwartungen spielt. Auf Basis
empirischer Gruppendiskussionen und mit Rückgriff auf systemtheoretische
Konzepte zeigt der Beitrag, wie sich über eng geknüpfte Erwartungsstrukturen in Entscheidungen, Werten, Rollen und Personenzusammenhängen
eine spezifisch landwirtschaftliche Identität herausbildet, die mit den pluralisierten Vorstellungen sozial-ökologischer Transformation nur bedingt
kompatibel ist. Der Beitrag legt offen, wie das Ende des früheren Modernisierungsparadigmas als identitärer Verlust erfahren wird und macht deutlich, welche Rolle die Inrechnungstellung gegenwärtiger Praxis auf den Höfen für die Anschlussfähigkeit agrarischer Zukunftsentwürfe spielt
Vereinfachung der EU-Regeln für mehr Nachhaltigkeit – Auswirkungen auf die Bauwirtschaft
No full textEinfluss von Kreuzungsträchtigkeiten auf die darauffolgende Laktationsleistung bei Deutschen Holstein-Kühen
No full textRelationship-Oriented Sustainability Marketing : Concepts, Challenges, and Opportunities
No full textThis book explores sustainability marketing through the lens of stakeholder relationship-related concepts, with a particular focus on stakeholders within global value chains, relationships with the public, and those affiliated with governmental entities. Addressing a perceived gap in the current literature, the chapters delineate contemporary challenges and propose potential solutions for each stakeholder group, prioritizing the strategic and cross-instrumental dimensions. Offering a comprehensive examination of relationship-oriented sustainability marketing in the contemporary landscape, this work will acquaint researchers with the challenges related to stakeholder engagement in sustainability marketing and advance scholarship on effectively managing stakeholder relationships
Treatment of Wood Fibers to Counteract Nitrogen Immobilization and Improve Plant Growth in Peat-Reduced Growing Media
No full textWood fibers can contribute to replacing peat in growing media and thus help protect peatlands. As domestically sourced, renewable raw materials, they represent a sustainable alternative. To date, however, wood fibers are usually used as a peat substitute at up to 30% (v/v). One major reason for this limitation is the insufficient resistance of wood fibers to microbial decomposition, which promotes immobilization of mineral nitrogen (N) and can thereby impair plant N supply. An ongoing research project is investigating whether this problem can be mitigated by thermal and thermohydrolytic treatments. For this purpose, conifer wood fibers were either heated to 220 °C in reactors at 100 mbar pressure for 10 minutes or heated to 100 °C at atmospheric pressure with the addition of 0.2 mol L⁻¹ sulfuric acid for 60 minutes, followed by washing. The objective is to reduce the availability of easily decomposable cell wall polymers and to cross-link their degradation products with lignin. The effectiveness of these modifications was evaluated through laboratory and greenhouse experiments. In an incubation test under standardized conditions (25 °C, substrate moisture at 80% of the water-holding capacity), commercially available untreated wood fibers exhibited high nitrogen immobilization. This undesired N transformation was significantly reduced by thermal and thermohydrolytic treatments. The strongest effect was observed in the thermal treatment, where only 52 mg N (L substrate)⁻¹ was immobilized within 20 days. In a vegetation trial, the effect of wood fiber modifications on plant growth and nitrogen dynamics in the cultivation of petunias (Petunia x hybrida cv. 'Musica Rose') was investigated. In this experiment, thermally treated and untreated wood fibers were mixed with white peat, each comprising 30%, 50%, and 70% (v/v) of the total substrate. Pure white peat served as the control. The shoot fresh mass yield of petunias grown in a substrate containing untreated wood fibers was already significantly reduced by a fifth at a mixing ratio of 30% (v/v) compared to the peat control. In substrates with thermally treated wood fibers, similar growth reductions were only observed at mixing ratio of 50% (v/v) or higher. However, the differences in yield were not related to nitrogen immobilization in the substrate. The nitrogen shortfalls determined via a balance calculation deviated only slightly between the two wood fiber variants. Further investigations are needed to clarify the underlying mechanisms responsible for the positive effect of thermal wood fiber treatment on plant growth
Lichtmanagement in der Putenhaltung – Möglichkeiten und Grenzen digital gestützter Stallbeleuchtung
No full textIntegrating Education for Sustainable Development with Organic Box Scheme Deliveries : Perspectives of Early Childhood Care Facilities in a Multi-Stakeholder Co-Creation Process
No full textIn response to the global challenges of today, the United Nations Sustainable Development Goals (SDGs) highlight the need for education for sustainable development (ESD) (Goal 4) and the promotion of sustainable consumption and production (Goal 12). Aligning with these objectives, this research project explores business model innovation for organic box scheme providers, focusing on fruit and vegetable boxes while integrating early childhood ESD through collaborations with childcare facilities. In the presentation we will look at how to integrate the perspective of early childhood care facilities in a multi-stakeholder co-creation process to develop a collaborative service offering. Organic produce delivery via box schemes is a well-established business model in organic agriculture. Many providers already maintain relationships with childcare facilities, supplying food and occasionally offering educational activities. However, these initiatives are often ad hoc rather than integrated into a cohesive service offering. The overall research project seeks to develop an innovative marketing strategy and business model for organic box scheme services that aligns sustainable food consumption with early childhood education, hence creating economic and social value. In an explorative phase and as part of the multi-stakeholder process the research project applies a mixed-method approach to gain insights from relevant stakeholders – parents, box scheme providers and childcare facilities – on the proposed collaborative offering. The presentation shows preliminary findings from case studies and qualitative interviews with childcare facilities, exploring their experiences, attitudes, and expectations regarding the integration of organic box deliveries with ESD. Preliminary results reveal common and context-specific challenges, such as funding mechanisms, infrastructure gaps, and varying levels of staff engagement. These insights underscore the importance of localized yet scalable models. The study highlights the untapped potential of existing box scheme collaborations. Although many institutions already cooperate in either food provision or education, few integrate both in a structured way. This gap presents a significant opportunity for developing comprehensive, co-created solutions that promote sustainable habits early in life. Findings from the explorative phase, including that of the research with childcare facilities, will serve as the foundation for a subsequent co-creation phase that will later follow as a separate element of the overall research project. In a structured workshop key stakeholders – childcare facilities, organic box providers and parents – will collaboratively develop a viable business model using design thinking methodologies, leading to the creation of a prototype service that will undergo empirical evaluation for feasibility and effectiveness. As the study is of explorative character and still in process, findings are not intended to be representative. Instead, they offer depth and diversity by capturing perspectives from different institutional types and operational models. By focusing on real-world experiences and involving stakeholders in design processes, the research ensures that proposed service models are grounded in feasibility and shaped by those implementing them. The study also reinforces the role of early education environments in fostering lifelong sustainable behaviours and links education with tangible systems change in food delivery and consumption. Ultimately, this study offers valuable insights for policymakers, educators, and businesses seeking to align economic viability with sustainability and education goals