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Registros recuperados: 58
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Agronomic strategies for the organic cultivation of potatoes for processing into high quality French fries and potato chips Organic Eprints
Böhm, Herwart; Krause, Tanja; Haase, Thorsten; Haase, Norbert U.; Loges, Ralf; Heß, Jürgen.
In order to achieve the successful cultivation of potato raw material to be processed into French fries and crisps, the high quality standards set by the processing industry have to be fulfilled and high tuber yields attained. In a cooperative research project, different strategies for the cultivation of high quality potato raw material for processing were examined under the conditions of organic farming. The choice of variety was found to be the most important agronomic instrument for the organic farmer to secure high tuber yields and quality. Varieties Agria and Marena can be recommended as they gave high tuber yields of the required size grade and also high French fry quality both at harvest and after storage. With regard to processing into crisps,...
Tipo: Book chapter Palavras-chave: Food security; Food quality and human health Crop combinations and interactions Root crops.
Ano: 2006 URL: http://orgprints.org/16538/1/finalpaper_HBoehm.pdf
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Ausgewählte Parameter der Ökoeffizienz im ökologischen und konventionellen Marktfruchtbau Schleswig-Holsteins Organic Eprints
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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Auswirkungen der Beregnung von Kartoffeln in Abhängigkeit der Stallmistdüngung auf den Ertrag, die Qualität sowie die Verarbeitungseignung zu Pommes frites und Chips Organic Eprints
Krause, Tanja; Böhm, Herwart; Loges, Ralf; Taube, Friedrich; Haase, Norbert U..
Ökologisch erzeugte Kartoffeln, die zur Verarbeitung zu Pommes frites oder Chips genutzt werden sollen, müssen besondere Qualitätseigenschaften aufweisen. So wird beispielsweise ein mittlerer bis hoher Stärkegehalt bei gleichzeitig niedrigen Gehalten an reduzierenden Zuckern gefordert. Um den von der verarbeitenden Industrie geforderten Qualitätsansprüchen gerecht zu werden, ist neben einer ausgewogenen Düngung gerade auf leichten Böden auch eine ausreichende Wasserversorgung entscheidend, die oft nur über Beregnung sichergestellt werden kann. Unter den Fragestellungen, ob organischer Dünger (Stallmist) durch die Beregnung besser von den Verarbeitungskartoffeln ausgenutzt werden kann und inwiefern Ertragsstruktur und die Qualitätsparameter von...
Tipo: Conference paper, poster, etc. Palavras-chave: Root crops; Irrigation and drainage; Composting and manuring.
Ano: 2005 URL: http://orgprints.org/8709/1/PflaTag2005_Krause_Kartoffelberegnung.pdf
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Autumn sown catch crop understoreys as strategy to reduce nitrate leaching in winter cereals Organic Eprints
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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Bicropping im ökologischen Winterweizenanbau - eine Alternative zum Anbausystem der „Weiten Reihe“? Organic Eprints
Neumann, Helge; Loges, Ralf; Taube, F..
Das "Weite Reihe"-System gilt als ein Verfahren zur ökologischen Produktion von Qualitätsweizen. Auf dem Versuchsgut für Ökologischen Landbau und extensive Landnutzungssysteme der Universität Kiel wurden in den Erntejahren 1999-2002 verschiedene Feldversuche zur Optimierung des Weite Reihe-Anbaus von Winterweizen durchgeführt (Variation von Reihenabstand, Weizensortentyp, Aussaatstärke, mechanischer Pflegeintensität, Untersaat). Im Anbaujahr 2001/02 kamen zusätzlich verschiedene Bicropping-Verfahren zum Einsatz, bei denen auf den Einsatz des Pfluges verzichtet wurde und die Weizenansaat direkt in einen Weißkleebestand erfolgte (verschiedene Techniken). Die getesteten Weite Reihe-Systeme führten in allen vier Versuchsjahren zu Mindererträgen. Die weite...
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2003 URL: http://orgprints.org/1948/1/neumann%2D2003%2Dbicropping%2Dweizen%2Dweite%2Dreihe.pdf
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Brutvögel auf ökologisch und konventionell bewirtschafteten Äckern in Norddeutschland Organic Eprints
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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Comparative analysis of conventional and organic farming systems: Diversity and abundance of farmland birds Organic Eprints
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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Dinitrogen fixation and residue nitrogen of different managed legumes and nitrogen uptake of subsequent winter wheat [N2-Fixierung und residualer Stickstoff verschiedener Futterleguminosen sowie N-Aufnahme der Folgefrucht Winterweizen.] Organic Eprints
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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Effect of Different Defoliation Systems of Ryegrass–Clover on Yield and Selected Quality Parameters of Organic Potatoes (Solanum tuberosum L.) for Industrial Processing at Harvest and After Storage Organic Eprints
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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Effekte der Umstellung auf ökologischen Landbau auf die Segetalflora zweier Ackerbaubetriebe in Schleswig-Holstein Organic Eprints
Neumann, Helge; Geweke, Oliver; Mauscherning, Inken; Schütz, Wolfgang; Loges, Ralf; Roweck, Hartmut; Taube, Friedhelm.
On two farms in Northern Germany the number of weed species in arable fields was about twice as large three to five years after conversion to organic agriculture compared with the last year of conventional cropping. Results indicate positive effects of organic farming on the weed flora although rare species are still lacking to date.
Tipo: Conference paper, poster, etc. Palavras-chave: Biodiversity and ecosystem services.
Ano: 2005 URL: http://orgprints.org/3712/1/3712.pdf
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Einfluss der Begleitgrasart auf Ertrag und Qualität von Rot- bzw. Weißkleegras Organic Eprints
Loges, Ralf; Hamacher, Maike; Kluss, Cristof; Taube, Friedhelm.
Über die Steuergrößen Leguminosen- bzw. Begleitgrasart, Saatmischungsverhältnis, Etablierungsverfahren, Nutzungsart und -häufigkeit sowie Düngung lassen sich Ertrag, N2-Fixierungsleistung, Vorfruchtwert und Futterqualität von Kleegras in weiten Bereichen beeinflussen. Ziel der vorliegenden Studie war die Analyse des Einflusses der Begleitgrasart auf Ertrag und Qualität von binären Rot- bzw. Weißkleegrasgemengen unter Berücksichtigung des Reifetyps der jeweiligen Grasart (früh versus spät) unter norddeutschen Boden- und Klimaverhältnissen. Die Wahl der Begleitgrasart zeigte sich als wirksames Werkzeug in Bezug auf die Beeinflussbarkeit des Klee-Ertragsanteils und damit zentraler Futterqualitätseigenschaften von Kleegrasgemengen dar. Besteht die Gefahr zu...
Tipo: Conference paper, poster, etc. Palavras-chave: Pasture and forage crops; Feeding and growth; Crop husbandry.
Ano: 2015 URL: http://orgprints.org/27280/1/27280_loges.pdf
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Einfluss unterschiedlicher Kleegrasnutzungssysteme auf Ertrag, Sortierung und Qualität ökologisch erzeugter Verarbeitungskartoffeln Organic Eprints
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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Einfluss von Standort und Sorte auf Ertrag, Sortierung und Qualität von ökologisch erzeugten Kartoffeln für die Verarbeitung zu Pommes frites Organic Eprints
Krause, Tanja; Haase, Thorsten; Böhm, Herwart; Heß, Jürgen; Loges, Ralf; Haase, Norbert U..
Im Zuge der Ausweitung des ökologischen Landbaus müssen den ökologisch wirtschaftenden Betrieben neue Vermarktungswege geboten werden. Da die Nachfrage nach Convenience-Produkten stetig steigt, könnte die Erzeugung von Verarbeitungskartoffeln den Landwirten neue Einkommensquellen eröffnen. Sowohl das Sortenspektrum wie auch die Qualitätseigenschaften der Kartoffeln, die zur Weiterverarbeitung zu Pommes frites genutzt werden, unterscheiden sich erheblich von denen der Speisekartoffeln. Im Jahr 2003 wurden Sortenversuche an 3 Standorten mit unterschiedlicher Bodengüte (Wulksfelde, Lindhof, Frankenhausen)angelegt, die in 2004 fortgeführt werden, um eine fundierte Sortenbewertung in Abhängigkeit der Standorte hinsichtlich Ertrag und Qualitätsausprägung...
Tipo: Conference paper, poster, etc. Palavras-chave: Root crops.
Ano: 2004 URL: http://orgprints.org/4168/1/Krause%2DSortenversuch%2DPflTag2004.pdf
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Einfluss von Zwischenfrüchten auf Lachgasverluste und Nitratauswaschung im ökologischen Marktfruchtbau in Abhängigkeit von der Vorfrucht Organic Eprints
Böldt, M.; Loges, Ralf; Kluss, Cristof; Taube, Friedhelm.
All-arable organic farming systems, especially when they are working without organic fertilizer, are often in challenge with their nutrient management to fulfill the requirements of crops. In this context one of the main issues is to mitigate nutrient losses. Here the use of catch crops may one strategy to counteract against this. We hypothesized that under the climate conditions of north-west Germany winter hard catch crops are more suitable to reduce nitrogen (N) losses than catch crops killed by frost, here especially with cereals or legumes as previous crop. In a field experiment in 2015/16 we tested 3 different catch crops (grown in pure stand and in mixture with legumes) after peas and triticale for their nitrogen loss paths over the winter period....
Tipo: Conference paper, poster, etc. Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover; Air and water emissions.
Ano: 2017 URL: http://orgprints.org/31876/1/Einfluss%20von%20Zwischenfr%C3%BCchten%20auf%20Lachgasverluste%20und.pdf
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Empirical model for quantification of symbiotic nitrogen fixation in grass-clover mixtures Organic Eprints
Høgh-Jensen, Henning; Loges, Ralf; Jensen, Erik Steen; Jørgensen, Finn V.; Vinther, Finn P..
Symbiotically fixed nitrogen (N2) is an important input of nitrogen (N) source in many agricultural systems. In spite of this fact, the input of symbiotically fixed N to a particular cropping system is usually not known and exact measurements are costly and laborious. Consequently, there is a demand for an uncomplicated and reliable tool to estimate symbiotic N2 fixation (SNF) in leguminous crops. A simple emperical model is proposed for quantification of SNF in forage legumes under low external input conditions. The model estimates SNF using dry matter yield as input and parameters for (i)N concentration in dry matter and the (ii) 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: Pasture and forage crops.
Ano: 2004 URL: http://orgprints.org/3085/1/emperical_model.pdf
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Empirical model for quantification of symbiotic nitrogen fixation in leguminous crops Organic Eprints
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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Energieeffizienz der Fruchtfolgen viehloser Ökobetriebe und eines konventionellen Ackerbaubetriebs in Schleswig-Holstein Organic Eprints
Loges, Ralf; Biernat, Lars; Taube, Friedhelm.
Several studies have shown that changing from conventional to organic farming is an alternative to reduce negative impacts on the environment, for example nitrogen losses, reduced biodiversity and input of fossil energy per unit land and per unit product. In organic agriculture, as well, there is currently a trend towards specialized farming systems. To compensate for the lack of data on energy efficiency measured at farm scale, a comparison between three differently managed organic all-arable crop rotations and a typical rotation of typical regional N-intensive conventional farm was carried out over a two-year period at a highly productive site in northern Germany. Comparing the all-arable crop rotations, the organic systems had a 62 % lower output...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop husbandry; Biodiversity and ecosystem services.
Ano: 2013 URL: http://orgprints.org/21593/1/21593_Loges.pdf
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Entwicklung eines pfluglosen Getreideanbausystems für den ökologischen Landbau: „Bicropping“ von Winterweizen und Weißklee Organic Eprints
Neumann, Helge; Loges, Ralf; Taube, Friedhelm.
Direct drilling of winter wheat in living mulches of white clover resulted in dry matter yields and forage quality of whole crop silage similar to wheat sown after ploughing. Grain yields, however, were lower in the intercropping system than in the sole wheat system. As wheat/clover “bicropping” caused very high grain yields of succeeding crops (oats, rye), it was concluded that the system allows to grow both cash crop and green manure crop in the same year and, therefore, might be a profitable alternative to otherwise common green manures in organic crop rotations.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Soil tillage.
Ano: 2005 URL: http://orgprints.org/3752/1/3752.pdf
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Ertrag, Futterqualität, N2-Fixierungsleistung und Vorfruchtwert von Rotklee- und Rotkleegrasbeständen Organic Eprints
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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Ertrag, Futterqualität und N2-Fixierungsleistung von Rotklee und Rotklee/Gras Organic Eprints
Loges, Ralf; Kornher, Alois; Taube, Friedhelm.
Rotklee/Gras stellt in ökologisch wirtschaftenden Betrieben häufig gleichzeitig die Basis der Winterfutterversorgung sowie die wichtigste N-Quelle dar. Zur Beurteilung der Leistungsfähigkeit von kleebasierten Anbausystemen fehlt es allerdings an Studien, die diese anbauentscheidenden Parameter gleichzeitig betrachten und Beziehungen zwischen ihnen in Abhängigkeit von Bewirtschaftungsmaßnahmen aufzeigen. Vor diesem Hintergrund wurde im Rahmen eines zweijährigen Feldversuches der Einfluss der Faktoren Klee/Gras-Saatmischungsverhältnis, Begleitgrasart und Bestandsalter auf Ertrag, Futterqualität, N2-Fixierungsleistung sowie auf Menge und Zusammensetzung der Ernterückstände von Rotklee/Gras untersucht. Die Faktoren Saatmischungsverhältnis, Begleitgrasart und...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover Pasture and forage crops Feeding and growth Cereals; Pulses and oilseeds.
Ano: 1998 URL: http://orgprints.org/2173/1/2173%2Dloges%2Dr%2D1998%2Dleguminosen%2Dertrag%2Dn2.pdf
Registros recuperados: 58
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