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Registros recuperados: 44
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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 reduzierter Produktionsintensität auf Futterqualität und ökologische Effekte Organic Eprints
Taube, Friedhelm; Wachendorf, M.; Loges, R..
Zusammenfassung: Aus aggregierter Sicht der pflanzenbaulichen Leistung wie des abiotischen Ressourcenschutzes ist festzuhalten: 1) der Futterbau auf den sandigen Standorten der Geest ist bei reduzierter N-Intensität durch geringe Grenzertragsverluste, aber hohe Reduktionen der Nitratauswaschungen geprägt; im Marktfruchtbau des östlichen Hügellandes herrschen inverse Beziehungen vor. 2) Ein Flächenbilanzsaldo von +20 bis +40 kg/ha/Jahr (plus "unvermeidbare gasförmige Verluste") ist als Grenzbereich der guten fachlichen Praxis auf den Futterbaubetrieben der Geest nur durch erhebliche Reduktionen der Bewirtschaftungsintensität zu erreichen. Auf den Marktfruchtbetrieben des östlichen Hügellandes besteht dagegen eine schwache Beziehung zwischen dem...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2001 URL: http://orgprints.org/2367/1/handbuch%2Dkein%2DDokument.pdf
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Auswirkungen von Schnitt-und Weidenutzung auf die Ertragsbildung und den Stickstoffgehalt verschiedener Futterleguminosen. Organic Eprints
Kleen, Jana; Gierus, Martin; Taube, Friedhelm.
The objective of this study was to compare the agronomic performance of different forage legume species submitted to different management systems, i.e. grazing, silage-cut and simulated grazing to find alternatives for white clover. The experiment was established in 2003 and 2004 as binary swards with perennial ryegrass (Lolium perenne L.) as the companion grass with three replicates in two different sites on the experimental station “Lindhof” of the University of Kiel. Legume species were arranged within each management system as completely randomised blocks. Results of agro-nomic performance of the first production years in 2004 and 2005 (DM-yield, botanical composition, N-yield, N-content) are presented for white clover swards (Trifolium repens L.), red...
Tipo: Conference paper, poster, etc. Palavras-chave: Pasture and forage crops Cereals; Pulses and oilseeds Beef cattle.
Ano: 2007 URL: http://orgprints.org/9573/1/9573_Kleen_Vortrag.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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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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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 der Grünlandnutzung auf die PPO-Aktivität in Rotklee Organic Eprints
Eickler, Birgit; Gierus, Martin; Taube, Friedhelm.
Several studies show that polyphenol oxidase (PPO) in red clover reduces proteolysis and increases nitrogen use efficiency of the ruminant, but not much is known about factors affecting PPO activity in red clover plants. PPO activity was analysed in red clover plants from legume-grass mixtures subjected to three different management systems. The cutting frequency (3 or 5 cuts) caused only minor differences in PPO activity, whereas a significant increase in PPO activity could be proved for the rota-tional grazing system (RG), compared to the simulated grazing system (SG, 5 cuts) with equal use frequency. Results indicate a metabolic adaptation of the red clover plants due to the grazing process itself, leading to a control factor which has to be considered...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Feeding and growth.
Ano: 2007 URL: http://orgprints.org/9597/1/9597_Eickler_Vortrag.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 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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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 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
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Ertrag, N-Fixierungsleistung sowie Ernterückstände verschiedener Rotklee- und Rotkleegrasbestände Organic Eprints
Loges, Ralf; Taube, Friedhelm; Kornher, Alois.
Die symbiontische Stickstofffixierung von Rotkleegras stellt in zahlreichen organisch wirtschaftenden Betrieben Norddeutschlands die wichtigste Stickstoffquelle dar. Ziel der vorgestellten Untersuchung ist die Prüfung in wie weit sich Ertrag, N2-Fixierung, Menge und Zusammensetzung der Ernterückstände sowie die N-Freisetzung nach dem Umbruch durch die pflanzenbaulichen Steuergrößen Klee/Gras-Ansaatmischung, Begleitgrasart sowie Nutzungsdauer und Nutzungsart (Schnitt/Grünbrache) beeinflussen lassen. Ältere bzw. schnittgenutzte Bestände, Bestände mit höheren Kleemengen in der Saatmischung bzw. Bestände mit Deutschem Weidelgras als Begleitgras wiesen höhere Kleeanteile auf als jüngere bzw. gemulchte Bestände sowie kleearme Saatmischungen bzw. solche mit...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover Pasture and forage crops Cereals; Pulses and oilseeds.
Ano: 1997 URL: http://orgprints.org/2155/1/loges%2D1997%2Dn%2Dfixierungsleistung%2Drotklee.pdf
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Ertrag und Futterqualität von Luzerne, Rotklee und Weißklee als Reinsaat sowie im Gemenge mit Deutschem Weidelgras Organic Eprints
Loges, Ralf; Wichmann, Stefan; Taube, Friedhelm.
Rotklee, Luzerne und Weißklee stellen vor allem im Gemenge mit Gräsern in zahlreichen ökologisch wirtschaftenden Betrieben die Basis der Winterfutterversorgung dar. Ertragsleistung und Futterqualität sind durch pflanzenbauliche Steuergrößen in weiten Bereichen beeinflussbar. Zu Vergleichen zwischen Rotklee, Luzerne und Weißklee hinsichtlich ihres Leistungspotentials liegen unter mitteleuropäischen Klimaverhältnissen nur wenige Untersuchungen vor. Im Rahmen eines dreijährigen Feldversuches der Einfluss der Faktoren Leguminosenart (Prüfglieder: Rotklee, Luzerne, Weißklee) und des Leguminosen/ Gras-Saatmischungsverhältnises (Prüfglieder: Leguminosenreinsaat, Leguminosen-Gras-Gemenge, Grasreinsaat) auf den TM-Ertrag, den Leguminosenanteil sowie die...
Tipo: Conference paper, poster, etc. Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2001 URL: http://orgprints.org/2148/1/loges%2D2001%2Dertrag%2Dqualitaet%2Dluzerne%2D%2D.pdf
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Ertrag und Futterqualität von Rotklee und Luzerne als Reinsaat sowie im Gemenge mit Gräsern Organic Eprints
Loges, Ralf; Taube, Friedhelm.
Rotklee bzw. Luzerne als Reinsaat bzw. im Gemenge mit Gräsern stellen in zahlreichen ökologisch wirtschaftenden Betrieben die Basis der Winterfutterversorgung dar. Wenige vergleichende Untersuchungen liegen zum Leistungspotential von Rotklee und Luzerne unter mitteleuropäischen Klimaverhältnissen vor. Vor diesem Hintergrund wurde im Rahmen eines Feldversuches der Einfluß der Faktoren Leguminosenart (Rotklee, Luzerne), Leguminosen/Gras-Saatmischungsverhältnis (Leguminosereinsaat, Grasreinsaat, leguminosereiche bzw. leguminosenarme Saatmischung) sowie Begleitgrasart (Dt. Weidelgras, W.Weidelgras) auf die Parameter Ertrag, Leguminosenanteil sowie die Futterqualitätsparameter RP-Gehalt, Nettoenergiekonzentration, ADF-, und ADL-Gehalt untersucht. Im Mittel...
Tipo: Conference paper, poster, etc. Palavras-chave: Pasture and forage crops Cereals; Pulses and oilseeds.
Ano: 1999 URL: http://orgprints.org/2154/1/loges%2D1999%2Dfutterqualitaet%2Drotklee%2Dluzerne%2Dgras.pdf
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Genotypbedingte Veränderungen der Proteinqualität bei der Gärfutterbereitung von Rotklee Organic Eprints
Krawutschke, Manuel; Weiher, Nina; Gierus, Martin; Thaysen, Johannes; Taube, Friedhelm.
Ensilage of red clover results in lower concentrations of non-protein nitrogen compared to other forage legumes. It is assumed that the polyphenol oxidase (PPO) activity in red clover is related to this effect. Therefore, a laboratory ensiling trial was carried out to quantify the changes in crude protein (CP) fractions during the ensiling process using the Cornell Net Carbohydrate and Protein System. At four cutting dates, fresh, wilted and ensiled herbage of three red clover genotypes and white clover grown in two systems (with and without mechanical stress) was sampled. The specific PPO activity was measured photometrically in fresh leaves of the plants. Concentrations of fraction A increased from 130-197 g/kg CP to 372-544 g/kg CP during the...
Tipo: Conference paper, poster, etc. Palavras-chave: Pasture and forage crops.
Ano: 2011 URL: http://orgprints.org/17345/3/Krawutschke_17345.pdf
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Growing systems for quality baking wheat: the effects of catch crops on yield and nitrate leaching Organic Eprints
Mauscherning, Inken; Loges, Ralf; Pedersen, Lene; Taube, Friedhelm.
In maritime climates the production of winter wheat often leads to high nitrate leaching losses. In this study mixtures of winter wheat and catch crops were analyzed as alternative growing system to avoid high leaching losses. In a field experiment pure winter wheat grown as control showed highest N-losses. Leaching losses of 140 kg N ha-1 after the pre-crop grass-clover and of 50 kg N ha-1 after oats as pre-crop were measured. Compared to this, growing winter wheat in mixture with forage rape or oats reduced nitrate leaching by 50 %. Common vetch as mixture partner to winter wheat had a lower potential to reduce leaching losses. Comparable results were obtained growing the catch crops alone followed by spring wheat. Due to the competition for growth...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions; Air and water emissions.
Ano: 2006 URL: http://orgprints.org/7577/1/Mauscherning.doc
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Klimagasemission im Futterbau: Vergleich von leguminosenbasierten und intensiv stickstoffgedüngten Grünlandbeständen Organic Eprints
Schmeer, Maria; Dittert, Klaus; Loges, Ralf; Taube, Friedhelm.
Aim of the presented study was the comparison of the specific emissions of CO2 equivalents of a legume based and a mineral N fertilised grassland considering the N2O emissions caused by N fertilisation and soil compaction. The field trial was set up on the experimental station “Hohenschulen” in northern Germany with the factors soil compaction, N fertilisation and experimental year. The N2O emissions were affected by an interaction of soil compaction and N fertilisation, especially under moist spring conditions. The specific CO2-equivalent emission per unit energy yield was 67 % higher for the mineral N-fertilised grassland compared to the legume based grassland.
Tipo: Conference paper, poster, etc. Palavras-chave: Air and water emissions.
Ano: 2011 URL: http://orgprints.org/17590/3/Loges_17590.pdf
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