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| Registros recuperados: 58 | |
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| Haase, Thorsten; Schüler, Christian; Böhm, Herwart; Krause, Tanja; Loges, Ralf; Taube, Friedhelm; Heß, Jürgen. |
| Voraussetzungen für einen erfolgreichen Anbau von Verarbeitungskartoffeln sind außer einem hohen Ertrag vor allem die von der Kartoffel verarbeitenden Industrie geforderten produktspezifischen Qualitäten für Pommes frites und Chips. Für die Verarbeitung zu Pommes frites muss z.B. ein hoher Anteil großfallender Knollen realisiert werden oder bei Chipskartoffeln bestehen strenge Vorgaben für die Gehalte an reduzierenden Zuckern. Um hohe Zuckergehalte zu vermeiden, erfolgt die Kartoffellagerung bei 8°C, was erhöhte Ansprüche an die Lagerfähigkeit bedeutet. In dem gemeinsam von der Universität Kassel (FG Ökologischer Land- und Pflanzenbau, Projektleitung), der FAL (Institut für ökologischen Landbau), der Universität Kiel (Institut für Pflanzenbau und... |
| Tipo: Report |
Palavras-chave: Root crops. |
| Ano: 2005 |
URL: http://orgprints.org/13028/1/13028%2D03OE003%2Duni%2Dkassel%2Dhaase%2D2005%2Dverarbeitungskartoffeln.pdf |
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| Loges, Ralf; Taube, Friedhelm. |
| Knowledge about the amount of fixed nitrogen of different legume crops is very important for calculation of farm N balances. According to literature the choice of determination method may have an impact on the estimated amount of N fixed by a legume sward. The aim of the study was to compare the three most important field methods for determination of nitrogen fixation under different sward management systems. In the present study the natural 15N abundance method gave lower fixation rates than the two alternative methods (total-N-difference method and 15N enrichment technique). The determination of N fixation based only on N in harvestable plant material underestimated the amount of fixed N on average by 70 kg × ha-1 compared to techniques including also... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover Specific methods Cereals; Pulses and oilseeds. |
| Ano: 2002 |
URL: http://orgprints.org/2151/1/loges%2D2002%2Dmethod%2Dn%2Dfixation%2Dlegumes.pdf |
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| Krause, Tanja; Böhm, Herwart; Loges, Ralf; Taube, Friedhelm; Haase, Norbert U.. |
| The most organic produced potatoes are used for direct marketing or home requirements. But due to the growing demand for “Convenience-products” like potato crisps and chips the production of processing potatoes offers farmers an alternative. In contrast to conventional agriculture the nutrient supply in organic potato production must be secured by preceding crops or organic fertilization. Clover grass as preceding crop is common in praxis. But as the case may be how the clover grass is utilized (mulching, cut mowing) a different nitrogen fixation and mineralization is possible. In a period of two years (2003/2004) the effect of different clover grass management systems on yield, grading and quality of processing potatoes was under examination on the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Root crops. |
| Ano: 2005 |
URL: http://orgprints.org/3607/1/3607.pdf |
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| Loges, Ralf; Ingwersen, Kathrin; Taube, Friedhelm. |
| Die N2-Fixierungsleistung von Leguminosenbeständen ist eine wichtige Kenngröße in der Betriebs-N-Bilanz bzw. der Fruchtfolgeplanung landwirtschaftlicher Betriebe. Aus der Literatur ist bekannt, dass die gewählte Messmethode große Bedeutung für die Höhe der ermittelten N2-Fixierungsleistung von Leguminosen besitzt. Vor diesem Hintergrund wurden 3 alternative Feldmethoden zur Bestimmung der N2-Fixierung vergleichend geprüft. Als Versuchsbestände dienten Futterleguminosenbestände, die sich in den Faktoren Leguminosenart (Rotklee, Weißklee, Luzerne), Saatmischungsverhältnis (Leguminosenreinsaat, Gemenge mit Dt. Weidelgras) sowie Nutzungsart (Schnitt, Brache) unterschieden. Die N2-Fixierungsleistungen dieser Bestände wurden parallel mit Differenzmethode,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover Specific methods Cereals; Pulses and oilseeds. |
| Ano: 2001 |
URL: http://orgprints.org/2147/1/loges%2D2001%2Dmethode%2Dstickstoff%2Dfixierung%2Dleguminose.pdf |
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| Loges, Ralf. |
| Zusammenfassung: In einem Feldversuch im Rahmen des Sonderforschungsbereiches 192 wurde in den Jahren 1994 und 1995 der Einfluß der Faktoren Klee/Gras-Saatmischungsverhältnis (Prüfglieder: 100% Rotklee, 67 % Rotklee + 33 % Gras, 33 % Rotklee + 67 % Gras, 100% Gras), Begleitgrasart (Prüfglieder: Deutsches Weidelgras, Welsches Weidelgras) und Bestandstyp (Prüfglieder: 1-jähriger Futterbau, 2-jähriger Futterbau, 1-jährige Gründüngung) auf die Parameter Ertrag, Futterqualität, N2-Fixierungsleistung sowie Menge und Zusammensetzung der Ernterückstände untersucht. Durchgeführt wurden die Untersuchungen an jeweils im August der Jahre 1993 und 1994 durch Blanksaat etablierten Klee/Gras-Beständen. Nach dem Umbruch der Klee/Gras-Bestände im Herbst 1995 wurden im... |
| Tipo: Thesis |
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds. |
| Ano: 1998 |
URL: http://orgprints.org/2174/1/loges%2D1998%2Drotklee%2Dgras%2Dqualitaet%2Dertrag%2Dn2%2Ddiss.pdf |
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| Loges, Ralf; Kaske, A.; Taube, F.. |
| Fixed nitrogen accumulated by legumes is the main nitrogen source for organic farming systems. Knowledge about the amount of fixed nitrogen, its pathways into forage yield, crop residues, soil-N and yield formation of the following crop is needed for designing crop rotations. Two field experiments were conducted in Northern Germany with differently managed (cut, mulched) legumes (red clover, alfalfa, white clover) in pure stands and various mixtures with two companion grasses (Lolium multiflorum, Lolium perenne) have been grown to determine N2-fixation, residue nitrogen and N-uptake of subsequent crops. Cropped grass/legume reached higher N2-fixation than mulched. While green manure grass/legume left up to 280 kg ha-1 of N in mulch, stubble and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover Crop combinations and interactions Cereals; Pulses and oilseeds. |
| Ano: 1999 |
URL: http://orgprints.org/2153/1/loges_1999.pdf |
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| Loges, Ralf; Kelm, Michael; Taube, Friedhelm. |
| Previous studies based on either small-scale plot experiments or modelling approaches, indicate a lower risk of nitrate leaching and a higher energy efficiency in organic than in conventional farming systems. Because there is still a lack of data measured at the farm scale, which also take farm type and farming practices into account, a comparison between an N-intensive non-organic, two organic all-arable crop rotations and a typical rotation of a mixed organic farm was carried out over a three-year period at a highly productive site in Northern Germany. Comparing the all-arable crop rotations, the organic systems had 70% lower potential yields than the regional typical conventional crop rotation. In spite of 60% lower input of fossil energy an N-intensive... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/12256/1/Loges_12256_ed.doc |
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| Hamacher, Maike; Loges, Ralf; Taube, Friedhelm. |
| Legumes and herbs are able to contribute to productivity and biodiversity in forage production. Besides they are known for beneficial properties for nutritive value and animal health. In the present study the potential yield and forage quality of eight legumes, four herbs and perennial ryegrass were tested under growing conditions in northern Germany. Due to their ability to bind protein and affect ruminal fermentation in a favourable manner, concentration of condensed tannins (CT) and total phenols (TP) were measured. Regarding some forage quality parameters, herbs and alternative legumes were equal or even exceed standard species. In general, herbs were lower in dry matter yield and crude protein, but higher in energy content and TP. Highest TP were... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pasture and forage crops; Feeding and growth. |
| Ano: 2015 |
URL: http://orgprints.org/27259/1/27259_hamacher.pdf |
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| Loges, Ralf; Mauscherning, Inken; Taube, Friedhelm. |
| Under conditions with wet mild winters due to high nitrate leaching risk growing systems with high nitrogen (N) uptake efficiency in autumn are necessary, especially after pre crops with a high N release. In 2003 and 2004 a field trial was conducted in Northern Germany to investigate autumn N uptake and nitrate leaching in autumn sown winter wheat (Triticum aestivum L.) and winter oilseed rape (Brassica napus) grown intercropped with catch crops. Catch crops in pure stands were sown as control. In each system three catch crops common vetch (Vicia sativa), forage rape (Brassica napus) and oats (Avena sativa) were tested simultaneously. The experiment was run parallel after grass clover (high N status) and oats (low N status). N uptake, soil mineral nitrogen... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/12535/1/Loges_12535_ed.doc |
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| Biernat, Lars; Loges, Ralf; Taube, Friedhelm. |
| Approximately 13 % of the total greenhouse gas emissions in Germany are caused by agricultural practices. From an environmental and economic point of view, gaseous N losses as well as nitrate leaching to groundwater play, a significant role. The aim of the present study is to analyze abiotic environmental effects of organic and conventional all-arable farming at a highly productive site in Northern Germany. Two different organic crop rotations with 25% vs. 40% legumes and no application of external N-fertilizers were compared over a two-year period to a typical site specific conventional rotation at an average mineral fertilser input of 195 kg N ha-1 a-1. For gas flux measurement, the closed-chamber method was applied. Nitrate leaching was measured by... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2015 |
URL: http://orgprints.org/27206/1/27206_biernat.pdf |
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| Bachinger, Johann; Becherer, Uwe; Bee, Wilhelm; Belau, Till; Blum, Hanna; Blumschein, Anja; Brinkmann, Jan; Deerberg, Friedhelm; Dreyer, Wilfried; Euen, Sven; Frieben, Bettina; Fritzsche, Stephan; Fröba, Norbert; Früh, Barbara; Fuchs, Sarah; Fügner, Kerstin; Gaio, Christina; Gengenbach, Heinz; Gottwald, Frank; Hackeschmidt, Andreas; Hänsel, Martin; Häring, Anna Maria; Hartmann, Wilfried; Hauber, Melanie; Haugstätter, Martin; Hermle, Martin; Herrle, Jürgen; Heyne, Peter; Holle, Romana; Keppler, Christiane; Klages, Susanne; Klöble, Ulrike; Kloepfer, Florian; Kolbe, Hartmut; Kühne, Stefan; Lang, Gerhard; Lasner, Tobias; Leopold, Jochen; Link, Matthias; Loges, Ralf; March, Solveig; Möller, Kurt; Puffert, Markus; Rahmann, Gerold; Reiners, Eckhard; Reinhold, Christian; Retter, Stefan; Rudolf von Rohr, Ramona; Sanders, Jürn; Sauer, Norbert; Schmid, Otto; Schmidt, Elisabeth; Schumacher, Ulrich; Schwab, Bernhard; Simantke, Christel; Spengler Neff, Anet; Stein, Matthias; Stein-Bachinger, Karin; Matthias, Stolze; Urbatzka, Peer; Vogt-Kaute, Werner; Weber, Martin; Werner, Dirk; Wesselmann, Stefan; Williges, Ute; Winbeck, Manuela; Zankl, Anke. |
| Die Faustzahlen bieten einen kompakten Überblick über den Ökologischen Landbau. Ob pflanzliche oder tierische Erzeugung, Lagerung und Vermarktung, Betriebsfüh-rung oder Biodiversität – die Faustzahlen liefern auf fast alle Fragen der Praxis eine Antwort. Dieses Buch gewährt Einblick in die besonderen Bedingungen des Ökolandbaus, vor allem in seine Kosten- und Leistungsstrukturen, aber auch in seine Möglichkeiten mit Herausforderungen umzugehen, wie z. B. Nährstoffversorgung oder Unkrautdruck. Ob es um Überschlagsrechnungen oder Vorplanungen geht, dieses Nachschlage-werk schließt Lücken, wenn eigene Daten und Erfahrungen fehlen. Die Inhalte sind in Tabellen strukturiert, in Grafiken veranschaulicht und in kurzen Texten erläutert. Die „Faustzahlen für den... |
| Tipo: Book |
Palavras-chave: Farming Systems Animal husbandry Crop husbandry Processing; Packaging and transportation Values; Standards and certification Environmental aspects. |
| Ano: 2015 |
URL: http://orgprints.org/32003/1/Leseprobe%20Faustzahlen%20%C3%96kolandbau.pdf |
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| Krause, Tanja; Böhm, Herwart; Loges, Ralf; Haase, Norbert U.. |
| Die Erzeugung von Verarbeitungskartoffeln im ökologischen Landbau hat im Gegensatz zu Speisekartoffeln bisher noch eine geringe Bedeutung. Denn ein großer Anteil der ökologisch erzeugten Kartoffeln wird für die Direktvermarktung angebaut, nur rund die Hälfte gehen in den Großhandel oder Industrie. In den letzten Jahren wurden ca. 3.000 bis 5.000 t Kartoffeln zu Chips und vor allen Dingen zu Pommes frites verarbeitet, was einer Anbaufläche von max. 200 ha entspricht. Im Zuge der Ausweitung des ökologischen Landbaus und gleichzeitig steigender Nachfrage der Verbraucher nach Convenience-Produkten wie Chips und Pommes frites könnte die Erzeugung von Verarbeitungskartoffeln den Landwirten neue Einkommensquellen bieten. Wichtig ist dabei auch ein an die... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions; Root crops. |
| Ano: 2005 |
URL: http://orgprints.org/8713/1/Krause_Beitrag_Kartoffelbau_8_2005_end.pdf |
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| Dresow, Jana; Krause, Tanja; Haase, Norbert U.; Loges, Ralf; Heß, Jürgen; Böhm, Herwart. |
| The nitrogen supply plays an important role in achieving quality characteristics in organic potato farming. Different defoliation systems of ryegrass–clover may influence the amount of fixed nitrogen available to the tubers. In a field experiment, the effect of different defoliation systems (cutting, mulching and a combination of them) of the pre-crop ryegrass–clover on selected quality attributes of organically grown potatoes, destined for processing into French fries (cv. Agria) or crisps (cv. Marlen), were conducted in two consecutive years (2003 and 2004). Parameters studied included compounds related to the sensory properties of potato food (tuber dry matter, starch, reducing sugars) as well as nutritional quality (nitrogen,minerals). Selected... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions Processing; Packaging and transportation Crop health; Quality; Protection Root crops. |
| Ano: 2013 |
URL: http://orgprints.org/27887/1/10.1007_s11540-013-9239-8_print.pdf |
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| Biegemann, Thorsten; Loges, Ralf; Taube, Friedhelm. |
| An increased demand for renewable raw materials for food and energy production has led to an increased intensification of agricultural production in northern Europe. Grassland, as well as arable production, has been affected by this development. Extensive grassland swards are often renovated with the aim of improving herbage yield and quality. The renovation of grassland leads to a reduction of CO2-C-fixation rates and increased soil mineralization processes. As a result levels of carbon losses and nitrous oxide (N2O) emissions increased in the short-term [1, 2]. Few studies have been carried out on the development of soil carbon and nitrous oxide emissions in medium or long-term (>1 year). In order to identify carbon sequestration and N2O-emissions... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Air and water emissions. |
| Ano: 2013 |
URL: http://orgprints.org/21569/1/21569_Biegemann.pdf |
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| Biegemann, Thorsten; Loges, Ralf; Chen, Shimeng; Taube, Friedhelm. |
| Die Landwirtschaft trägt weltweit mehr als 50% zu den globalen N2O-Emissionen bei. Überwiegend entstehen diese durch Nitrifikation, Nitrifikation/Denitrifikation und Denitrifikation in gedüngten Böden. Die Verfügbarkeit von leicht mineralisierbarer organischer Substanz in Kombination mit einem hohen Boden-N-Angebot begünstigen vermutlich vor allem die heterotrophen Denitrifikanten, welche hypothetisch den größten Beitrag zu den N2O-Emissionen aus Böden leisten. Gewöhnlich führt die mechanische Bodenbearbeitung wie zum Beispiel der Grünlandumbruch zu einem gesteigerten Angebot an schnell mineralisierbaren Kohlenstofffraktionen und einer gesteigerten N-Mineralisation. Zur Einschätzung der N2O-Emissionen von einem ökologisch bewirtschafteten... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2011 |
URL: http://orgprints.org/17737/3/Biegemann_17737.pdf |
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| Neumann, Helge; Loges, Ralf; Taube, Friedhelm. |
| A comparative study on the abundance of breeding birds and wintering birds was carried out over the period 2005-2007 in conventionally and organically managed arable fields in Northern Germany. Birds were surveyed on 40 (breeding season) and 35 (non-breeding season) pairs of fields (conventional/organic), which were selected with regard to similar field sizes, comparable boundary structures (hedges, shrubs) and representative crop rotations. Averaged over three years of investigation, skylarks (Alauda arvensis) and, less distinct, pheasants (Phasianus colchicus) occurred more often on organic fields. In contrast, yellow wagtails (Motacilla flava) showed higher abundances on conventional fields in one year. The diversity of farmland bird species was not... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2008 |
URL: http://orgprints.org/12173/1/Neumann_12173_ed.doc |
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| Høgh-Jensen, Henning; Loges, Ralf; Jensen, Erik Steen; Jørgensen, Finn V.; Vinther, Finn P.. |
| Symbiotically fixed N2 (SNF) is an important input of nitrogen (N) in many cropping systems. In spite of this fact, the input of fixed N to a particular cropping system is usually not known, and an exact estimation of the amount of N2 fixed requires laborious measurements. Consequently, there is a demand for a simple and reliable tool to estimate N2 fixation in leguminous crops. A model is here proposed for quantification of SNF in leguminous crops in different arable systems. The model estimates SNF using dry matter yield as input and cropping system specific values for the parameters: N concentration in dry matter and the proportion of the N in the legume that is derived from the atmosphere. Further, the model includes fixed N not included in the... |
| Tipo: Journal paper |
Palavras-chave: Production systems. |
| Ano: 2003 |
URL: http://orgprints.org/316/1/Emperical_N2%2Dfixation_eng_v6.doc |
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| Bunne, Inga; Kluß, Christof; Loges, Ralf; Herrmann, Antje; Taube, Friedhelm. |
| Intensified agriculture is often associated with nitrous oxide (N2O) emissions and nitrate (NO3) leaching losses into groundwater due to high application rates of N-fertilizer, increasing maize cultivation and ploughing up permanent grassland. N2O is an important anthropogenic greenhouse gas and agriculture is one of the main polluters. NO3 leaching endangers groundwater quality. In a field experiment on the organically managed farm “Lindhof” in Northern Germany three different forage production systems (1. crop rotation, 2. continuous silage maize 3. permanent grassland) were established parallelly after a) ploughing up permanent grassland and b) longtime arable use. N2O emissions were measured weekly over the two-year experimental period. Soil water... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: "Organics" in general. |
| Ano: 2015 |
URL: http://orgprints.org/27208/1/27208_bunne.pdf |
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| Neumann, Helge; Loges, Ralf; Taube, Friedhelm. |
| A two-year comparative study on the abundance of breeding birds on conventional and organic arable fields was carried out in Northern Germany (federal state of Schleswig-Holstein). Birds were surveyed on 40 pairs of fields (conventional/organic), which were selected with regard to similar field sizes and comparable boundary struc-tures (hedges, shrubs). Averaged over two experimental years, skylarks (Alauda arvensis) as well as pheasants (Phasianus colchicus) occurred more often on organic fields, while yellow wagtails (Motacilla flava) reached higher abundances on conven-tional fields. Diversity of farmland birds was not affected by type of management. Concerning the regional threat of farmland bird species, organic farming might make a contribution to... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2007 |
URL: http://orgprints.org/9571/1/9571_Neumann_Vortrag.pdf |
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| Registros recuperados: 58 | |
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