|
|
|
| Registros recuperados: 8.082 | |
|
| |
|
|
| Haas, Guido; Friedt, Wolfgang. |
| Zum Thema "Nährstoffeffizienz" liegt ein weites Spektrum wissenschaftlicher Untersuchungen der verschiedensten Fachgebiete vor. In diesem Beitrag wurden die vorhandenen Untersuchungsergebnisse anhand von zwei Formen der Charakterisierung nährstoffeffizienter Sorten strukturiert. Einerseits wird mit dem deskriptiven Ansatz eine Beurteilung der Ertragsleistungen einer Sorte in verschiedenen Nährstoff-Umwelten in den Vordergrund gestellt. Hieraus ist eine direkte Selektion unter Freilandbedingungen abzuleiten. Andererseits wurde eine analytische Charakterisierung formuliert, aus der eine indirekte Selektion von nährstoffeffizienten Eigenschaften als sekundäre Merkmale zu entwickeln ist. Die Vielzahl möglicher morphologischer, anatomischer und physiologischer... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems Breeding; Genetics and propagation. |
| Ano: 1990 |
URL: http://orgprints.org/13942/1/NeffZuchtGump90.pdf |
| |
|
|
| Znaor, Darko. |
| Due to the benefits of diversity, autonomous ecosystem management and careful farmers' stewardship, pest and disease control doesn't pose a profound problem in ecological agriculture practice. However, during the conversion period, and in ecological horticulture, particularly in fruit growing, this preventive control is often not sufficient enough, and additional control, mostly (curative) spraying is needed. This need for additional pest and disease control (spraying) in ecological horticulture, may be linked with our incomplete understanding of the role of those subsystems in the agro-ecosystem as a whole. Currently, organic standards normally do specify permitted (environmental friendly, mainly natural substances), prohibited (synthetic pesticides),... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems Vegetables Values; Standards and certification Fruit and berries Crop health; Quality; Protection Environmental aspects Regulation. |
| Ano: 1994 |
|
| |
|
| |
|
|
| Halberg, Niels; Kristensen, Erik Steen; Refsgaard, Karen. |
| The problems of balancing agricultural production methods against environmental concern cannot be solved by focusing on single activities of livestock farming and experimental knowledge alone because of interactions between herds and crops and between the production system and the manager. An alternative method based on studies in private farms is proposed to evaluate the effects of the production intensity on pollution and resource efficiency. Energy use and crop yield in gram and grass-clover crops registered on conventional and organic mixed dairy farms were analyzed in order to facilitate modelization of energy efficiency in different production systems on different danish soil types. The energy efficiency was higher in organic crops on all soil types... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects; Farming Systems; Crop husbandry. |
| Ano: 1994 |
URL: http://orgprints.org/13115/1/13115.pdf |
| |
|
| |
|
|
| Vartdal, Barbro; Løes, Anne-Kristin. |
| Conversion to organic agriculture as a process of social adaptation was qualitatively analysed by the sociologists Barbro Vartdal and Arild Blekesaune during 1990-92. Altogether, 33 farmers were analysed, giving the sociologists interviews, written diaries or reports as material. The farmers participated in the "30 farm-project", conducted by the Norwegian Centre for Ecological Agriculture. The sociologists described three categories of eco-farmers, according to whether the farmer was cosmopolitically or locally orientated: The antroposopher,the ecosopher and the reformist. Their motivations of farming, conversion and mastering strategies as well as social barriers for conversion were described. It is argued that conversion is a social process as well as a... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Social aspects. |
| Ano: 1994 |
URL: http://orgprints.org/19309/1/Vartdal_and_L%C3%B8es_Mikkeli_NJF_1994.pdf |
| |
|
|
| Schulz, D.G.; Köpke, U.. |
| Mit erheblichen finanziellen Mitteln fördert die Deutsche Forschungsgemeinschaft (DFG) zum ersten Mal eine Forschergruppe innerhalb der Landwirtschaftlichen Fakultät der Bonner Universität. Nach den Richtlinien der DFG ist eine Forschergruppe ein längerfristiger Zusammenschluss mehrerer, in der Regel an einem Ort wirkender Wissenschaftler zur Bearbeitung einer besonderen Forschungsaufgabe [...]. Trotz des bestehenden günstigen Images von Produkten des Organischen Landbaus muss davon ausgegangen werden, dass die Verbraucher verstärkt Fragen nach der Qualitätssicherung und deren Nachweis für diese Produkte stellen werden. Die Nachweise einer höheren Produktqualität von Erzeugnissen des Organischen Landbaus sind jedoch bislang in der Gesamtheit betrachtet... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Root crops. |
| Ano: 1995 |
URL: http://orgprints.org/2516/1/SCHULZ_KOEPKE_1995.pdf |
| |
|
| |
|
|
| Schulz, D. G.; Gmelin, C.; Mehrens, A.; Sabiwalsky, B.; Köpke, U.. |
| Die gesteigerte Düngung ergab an beiden Standorten bei den meisten Parametern die erwarteten Effekte. Eine Wirkung der biologisch-dynamischen Präparate, entweder getrennt in Kompost- und Spritzpräparate, oder kombiniert angewendet, konnte ebenfalls bei mehreren Parametern nachgewiesen werden. Allerdings ist nach wie vor nicht klar, unter welchen Umständen diese Präparate wirken und warum sie z.T. gegensinnige Effekte haben. In dem hier vorgestellten Projekt stehen zur Zeit aus den letzten beiden Versuchsjahren noch diverse Parameter, u.a. einige Inhaltsstoffe (z.B. Ascorbinsäure, Nitrat, Mineralstoffe) zur Analyse und Auswertung aus. Aus diesen Ergebnissen und denen der nächsten fünf Jahre erwarten wir in der Zusammenschau mit den Ergebnissen unserer... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Root crops. |
| Ano: 1995 |
URL: http://orgprints.org/2503/1/SCHULZ_GMELIN_MEHRENS_SABIWALSKY_KOEPKE_1995a.pdf |
| |
|
| |
|
| |
|
|
| Haas, Guido. |
| Die Beurteilung des Energieeinsatzes der Erzeugung von Lebensmitteln erfordert ein anderes Effizienzkriterium als die Erzeugung von Brennstoffen. Die Energieeffizienz (Wirkungsgrad) stellt die Relation bzw. den Quotient von Energiezufuhr (Input) zu der Zielgröße Ertrag (Output: Masse oder Energie) dar. Der Energieertrag selbst ist kein geeigneter Maßstab zur Parametrisierung der Energieeffizienz. Um unterschiedliche Ertragsleistungen (Masse oder Energie) bei der Effizienzbeurteilung zu berücksichtigen, sind ev. verschiedene Leistungsklassen zu bilden. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general; Air and water emissions. |
| Ano: 1996 |
URL: http://orgprints.org/13932/1/Brennwert_Lebensmittel96.pdf |
| |
|
|
| Znaor, Darko. |
| The urge for more sustainable agriculture is increasingly recognized by the various parts of society (producers, consumers, scientists, policy makers, etc.). But in order to realize sustainable agriculture in practice it is not sufficient to change only the on-farm agricultural practices. Present socio-economic and political paradigms also need a change so that these can be able to support implementation of sustainable agriculture. The concept of Demonstration Centres for Applied Agricultural Sustainability (DCAAS) offers an interesting concept and operative tool for changes not only at the farm level. Well designed and professionally organized DCAAS don't have a potential to demonstrate only "excellence" of sustainable agricultural production in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general Education; Extension and communication Knowledge management. |
| Ano: 1996 |
|
| |
|
| |
|
|
| Schulz, Dr. D.G.; Koch, K.; Kromer, Prof K.-H.; Köpke, Prof. U.. |
| Nutritional quality of food can be characterized by the content of beneficial and harmful substances. For today’s consumers the most important criteria for buying potatoes are taste, quality and shelf-life. Biodynamic preparations are used by about 20% of all organic farms in Germany. These preparations do not primarily serve to increase the yield but are said to support the production of high quality food, having balanced nutrient contents and improved shelf-life characteristics. Since 1993 investigations have been carried out to evaluate the effect of mineral fertilization and organic manuring at varied intensities, combined with application of biodynamic preparations, on some of these parameters. The potatoes of the variety ´Granola´ responded... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Root crops. |
| Ano: 1997 |
URL: http://orgprints.org/2512/1/SCHULZ_KOCH_KROMER_KOEPKE_1997a_e.pdf |
| |
|
|
| Schulz, D.G.; Köpke, U.. |
| Adequately assessing the quality of food grown with different cultivation methods is a constant problem. According to SCHUPHAN (1961), food quality consists of three main characteristics: grading, technological quality and nutritional quality. The latter involves the ratio between beneficial and harmful substances. Yet it is obvious that more than merely summing various substances is needed to assess the quality of food properly. This problem has been previously discussed by SCHORMÜLLER (1974) and KLETT (1968). A concept of quality that embraces the plant as a whole (and the internal equilibrium of the individual components) requires bringing together the results of multiple investigations in an integrated accounting that registers even slight... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Research methodology and philosophy. |
| Ano: 1997 |
URL: http://orgprints.org/2519/1/SCHULZ_KOEPKE_1997a_e.pdf |
| |
|
|
| Kristensen, E.S.; Halberg, N.. |
| The concept of sustainability is widely used in agriculture. There i, however, a large variability in the interpretation of the meaning of sustainability. The broad understanding in conjunction with the complexity of livestock farming calls for a systems approach. In this paper different interpretation of sustainable agriculture id described and discussed. It is concluded that sustainable agriculture has a major normative dimension and obviously has different meanings for different groups in society. Using sustainability in a system describing concept, one has to be very aware of the normative dimension. With a starting point in farm models previously described in this journal a model is introduced where the farm is shown in the centre and put into... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Animal husbandry. |
| Ano: 1997 |
URL: http://orgprints.org/15569/1/15569.pdf |
| |
|
|
| Raupp, Dr Joachim. |
| Based on investigations with samples of a fertilization trial started in 1980, some parameters of storage ability are evaluated. Microbial infestation of the product during incubation seems to be the most reliable parameter. But the circumstances of infestation are as unknown as the optimal test conditions. There is no reliable correlation between results of degradation tests, storage tests under optimal conditions and chemical contents of the product. The quality concept of product vitality (product-oriented), i.e. a product full of vigour, based on results of degradation tests is discussed. Ultimately, food quality standards are based on human priorities (human-oriented). Therefore, not only product characteristics, but also social, psychological,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Specific methods. |
| Ano: 1997 |
URL: http://orgprints.org/756/1/rawita42.pdf |
| |
|
|
| Neuhoff, Daniel; Schulz, Dirk Gerhard; Köpke, Ulrich. |
| Während für den Verbraucher organisch angebauter Kartoffeln der Geschmack, die Koch-eigenschaften und der Gesundheitswert maßgebliche Kaufkriterien darstellen, sind für den Anbauer das Ertragsniveau, die Ertragssicherheit und die Lagereignung wichtige Zielgrößen. Maßgebliche Einflußfaktoren auf diese Zielgrößen stellen die Sortenwahl und die Höhe der organischen Düngung dar. Im Rahmen eines von der Deutschen Forschungsgemeinschaft und der Eden-Stiftung finanzierten Projektes, an dem mehrere Institute der Universität Bonn beteiligt sind, werden an verschiedenen Standorten Feldversuche mit differenzierter Sortenwahl, Düngungshöhe und Düngungsart (mineralisch, organisch, biologisch-dynamisch) durchgeführt. Auf Grundlage der mit diesen Feldversuchen... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Root crops. |
| Ano: 1997 |
URL: http://orgprints.org/1288/1/1288%2Dneuhoff%2D1997%2Dsorte%2Drottemist.pdf |
| |
| Registros recuperados: 8.082 | |
|
|
|
