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| Registros recuperados: 44 | |
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| 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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| 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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| Taube, Friedhelm; Pötsch, E.M.. |
| A survey is presented on the impact of different intensities of grassland management related to nutrient balances and their assessment. With special reference to data from Austria and Germany, it is postulated that on-farm nutrient balance assessment is a valuable tool for identifying deficits in efficiency of nutrient use in the soil-plant-animal system. Farm gate balances can be used as indicators for Codes of Good Agricultural Practice in Europe, if input/output parameters and calculations are standardised and if acceptable surpluses are regionally validated. |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Pasture and forage crops. |
| Ano: 2001 |
URL: http://orgprints.org/2362/1/handbuch%2Dkein%2DDokument.pdf |
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| Loges, Ralf; Thaysen, Johannes; Taube, Friedhelm. |
| Als Teil eines mehrjährigen Feldversuchs mit dem Ziel des Vergleiches unterschiedlicher Futterleguminosen/Grassaatmischungen in Bezug auf Ertrag, Futterqualität, N2-Fixierung sowie Vorfruchtwert wurden ausgewählte Aufwüchse im Silierversuch bezüglich Siliereignung sowie Silagequalität geprüft. Der Silierversuch umfasste die Faktoren Leguminosenart (Prüfglieder: a. Rotklee, b. Luzerne) Leguminosen/Gras-Siliermischungsverhältnis (Prüfglieder: a. 100%, b. 67%, c. 33%, d. 0% Leguminosenanteil) und Aufwuchs (Prüfglieder: a. 1. Aufwuchs (Gras: generativ, Leguminose nicht generativ) b. 3. Aufwuchs (Gras nicht generativ, Leguminose generativ)). Mischungen mit Luzerne zeigten sich als deutlich schlechter silierbar als vergleichbare Mischungen mit Rotklee und... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pasture and forage crops Feeding and growth Cereals; Pulses and oilseeds. |
| Ano: 2002 |
URL: http://orgprints.org/2150/1/loges%2D2002%2Dsilagequalitaet%2Drotklee%2Dluzerne%2Dgras.pdf |
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| 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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| 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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| 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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| 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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| Kelm, Michael; Loges, Ralf; Taube, Friedhelm. |
| Nitrogen (N) leaching, especially in the form of nitrate (NO3-), still represents a major environmental impact from agriculture. In order to estimate potential N leaching losses under conditions on commercial farms in Northern Germany, N leaching was analyzed by using ceramic suction cups on representative fields on eight organic and conventional farms. On dairy farms, permanent grassland and maize for silage were analyzed as the main fodder crops. On arable farms, one crop with a high risk and one with a low risk of N leaching losses were selected. On permanent grassland, N leaching was pronouncedly lower on organic farms. If grass/clover on organic farms was ploughed, high amounts of N were leached in the following winter, irrespective if grass/clover... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2007 |
URL: http://orgprints.org/11005/1/256_9765_Kelm_N%2DAuswaschung.pdf |
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| Loges, Ralf; Taube, Friedhelm. |
| Im Rahmen des interdisziplinären Forschungsprojektes Hof Ritzerau wurden zwei Fruchtfolgen mit unterschiedlichem Leguminosenanteil (40% bzw. 25%) über einen fünfjährigen Zeitraum (2004/05 – 2008/09)in Bezug auf Nitratauswaschung, Ertrag und N-Bilanz verglichen. Im Mittel der Sickerwasserperioden wurde ein deutlicher Einfluss der einzelnen Fruchtfolgeglieder auf das Ausmaß der Nitratauswaschung im folgenden Winter festgestellt. Nach Körnerleguminosen auf die intensive Bodenbearbeitung folgte bzw. nach Herbstumbruch von Kleegras wurden mit ca. 60 kg NO3-N/ha die höchsten Auswaschungen festgestellt, was bei einer Sickerwassermenge von ca. 313 mm eine deutliche Überschreitung der kritischen Nitratkonzentration von 50 mg je Liter Sickerwasser bedeutet.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/17758/3/Loges_17758.pdf |
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| 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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| 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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| 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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| 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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| 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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| 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; 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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| 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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| Registros recuperados: 44 | |
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