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Registros recuperados: 27
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A framework for a European network for a systematic environmental impact assessment of genetically modified organisms (GMO) Organic Eprints
Graef, Frieder; Römbke, Jörg; Binimelis, Rosa; Myhr, Anne Ingeborg; Hilbeck, Angelika; Breckling, Boder; Dalgaard, Tommy; Stachow, Ulrich; Catacora-Vargas, Georgina; Bohn, Thomas; Quist, David; Darvas, Béla; Dudel, Gert; Oehen, Bernadette; Meyer, Hartmut; Henle, Klaus; Wynne, Brian; Metzger, Marc J.; Knäbe, Silvio; Settele, Josef; Székács, András; Wurbs, Angelika; Bernard, Jeannette; Murphy-Bokern, Donal; Buiatti, Marcello; Giovannetti, Manuela; Debeljak, Marko; Andersen, Erling; Paetz, Andreas; Dzeroski, Saso; Tappeser, Beatrix; van Gestel, Cornelis A.M.; Wosniok, Werner; Séralini, Gilles-Eric; Aslaksen, Iulie; Pesch, Roland; Maly, Stanislav; Werner, Armin.
The assessment of the impacts of growing genetically modified (GM) crops remains a major political and scientific challenge in Europe. Concerns have been raised by the evidence of adverse and unexpected environmental effects and differing opinions on the outcomes of environmental risk assessments (ERA). The current regulatory system is hampered by insufficiently developed methods for GM crop safety testing and introduction studies. Improvement to the regulatory system needs to address the lack of well designed GM crop monitoring frameworks, professional and financial conflicts of interest within the ERA research and testing community, weaknesses in consideration of stakeholder interests and specific regional conditions, and the lack of comprehensive...
Tipo: Journal paper Palavras-chave: Biodiversity and ecosystem services.
Ano: 2012 URL: http://orgprints.org/23020/1/Graef-etal-2012-BioRisk-Vol7-p73-97.pdf
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Biogas in organic agriculture - effects on productivity, energy self-sufficiency and greenhouse gas emissions Organic Eprints
Pugesgaard, Siri; Olesen, Jørgen E.; Dalgaard, Tommy; Jørgensen, Uffe.
Reduction in the dependency on fossil fuels has been identified as one of the important areas for development of organic farming in Denmark (ICROFS, 2008). The increased public awareness on the need for actions against global warming has brought Green House Gas (GHG) emissions and the use of fossil fuels into focus in the agricultural organisations in general as well as in the organic agricultural organisations. Several scenarios for biogas production in organic agriculture could be imagined. The implementation of biogas production on organic farms and the effect of this implementation depend on the existing farming system, how the implementation is done and how this changes the farming system. Therefore the aim of this paper is to focus specifically...
Tipo: Journal paper Palavras-chave: Air and water emissions; Biodiversity and ecosystem services; Landscape and recreation; Farm nutrient management.
Ano: 2013 URL: http://orgprints.org/18940/16/18940.pdf
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Biomass energy in organic farming - the potential role of short rotattion coppice Organic Eprints
Jørgensen, Uffe; Dalgaard, Tommy; Kristensen, Erik Steen.
One of the aims of organic farming is to “reduce the use of non-renewable resources (e.g. fossil fuels) to a minimum”. So far, however, only very little progress has been made to introduce renewable energy in organic farming. This paper presents energy balances of Danish organic farming compared with energy balances of conventional farming. In general, the conversion to organic farming leads to a lower energy use (approximately 10% per unit of product). But the production of energy in organic farming is very low compared with the extensive utilisation of straw from conventional farming in Denmark (energy content of straw used for energy production was equivalent to 18% of total energy input in Danish agriculture in 1996). Biomass is a key energy carrier...
Tipo: Journal paper Palavras-chave: Recycling; Balancing and resource management.
Ano: 2005 URL: http://orgprints.org/3959/1/3959_Biomass.pdf
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Buffers for biomass production in temperate European agriculture: A review and synthesis on function, ecosystem services and implementation Organic Eprints
Christen, Ben; Dalgaard, Tommy.
In addition to their potential for biomass production, buffer strips on agricultural land have been shown to protect surface water quality by reducing erosion and nutrient leaching, and can play a key role in nature and flood protection, and the design of bioenergy landscapes resilient to climate changes, and the environmental pressures from intensive agriculture. Use of conservation buffers by farmers outside of designated schemes is very limited to date, but the increasing demand for bioenergy and the combination of agricultural production with nature protection calls for a much wider implementation. This paper reviews the knowledge on buffer functioning, socioeconomics and practical farming aspects. It describes how a defined three-zone buffer design,...
Tipo: Journal paper Palavras-chave: Biodiversity and ecosystem services; Landscape and recreation; Farm nutrient management.
Ano: 2013 URL: http://orgprints.org/18937/4/18937.pdf
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Concepts for a multi-criteria sustainability assessment of a new more biobased economy in rural production landscapes Organic Eprints
Dalgaard, Tommy; Jørgensen, Uffe; Kristensen, I.T.; Gylling, M.; Dejgaard, J.; Dubgaard, Alex; Kjeldsen, Chris; Hermansen, J.E.; Turner, K.G.; Christen, Ben; Andersen, P.S..
This study presents a new approach to model the biophysical potentials for increased biomass harvest in Denmark, and a multi-criteria sustainability assessment of the socio-economic and environmental effects of different scenarios for such increased production and new biobased economy in rural landscapes. Thereby the results serve as input to the ongoing productivism – post-productivism debate related to rural spaces in Europe. Empirical results from a case study of large scale conversion to biorefenery technologies, aiming to increase the total Danish harvest of biomass by 10 million tonnes via the conversion to new types of crop production and land management, is used as an example, and will be related to the common conceptual model presented by the...
Tipo: Conference paper, poster, etc. Palavras-chave: Farm economics; Technology assessment; Social aspects; Farm nutrient management; Regulation.
Ano: 2012 URL: http://orgprints.org/21222/4/21222.pdf
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Developments in greenhouse gas emissions and net energy use in Danish agriculture - How to achieve substantial CO2 reductions? Organic Eprints
Dalgaard, Tommy; Olesen, Jørgen E.; Petersen, B.M.; Petersen, Søren O.; Jørgensen, Uffe; Kristensen, Troels; Hutchings, Nicholas J.; Gyldenkerne, Steen; Hermansen, J.E..
Greenhouse gas (GHG) emissions from agriculture are a significant contributor to total Danish emissions. Consequently, much effort is currently given to the exploration of potential strategies to reduce agricultural emissions. This paper presents results from a study estimating agricultural GHG emissions in the form of methane, nitrous oxide and carbon dioxide (including carbon sources and sinks, and the impact of energy consumption/bioenergy production) from Danish agriculture in the years 1990-2010. An analysis of possible measures to reduce the GHG emissions indicated that a 50-70% reduction of agricultural emissions by 2050 relative to 1990 is achievable, including mitigation measures in relation to the handling of manure and fertilisers,...
Tipo: Journal paper Palavras-chave: Nutrient turnover; Air and water emissions; Buildings and machinery; Landscape and recreation; Farm nutrient management.
Ano: 2011 URL: http://orgprints.org/19044/4/19044.pdf
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Does organic farming enhance biodiversity? Complex issues and modelling approaches Organic Eprints
Andersen, Liselotte Wesley; Marchi, Chiara; Topping, C.J.; Strandberg, Beate; Bruus Pedersen, Marianne; Damgaard, Christian; Jensen, Thomas Secher; Olsen, Kent; Dalgaard, Tommy.
Changes in agriculture might drive changes in biodiversity and are expected to have just as serious an effect as climate change. These changes are results of complex changes in land-use as well as land management, intensification of management and structural developments in agriculture. In this review we present results of a recent research project (ICROFS 2013) focusing on organic farming and biodiversity in Denmark and relate the results to international studies that focus on drivers of biodiversity in the agricultural landscape. The project was organized under five major themes, forming the main sections of the present review paper: Impact on i) plant biodiversity ii) insect and food-webs in cereal fields, iii) small mammals, iv) natural genetic...
Tipo: Journal paper Palavras-chave: "Organics" in general.
Ano: 2013 URL: http://orgprints.org/23312/13/23312.pdf
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Effects of farm heterogeneity and methods for upscaling on modelled nitrogen losses in agricultural landscapes Organic Eprints
Dalgaard, Tommy; Hutchings, Nicholas J.; Dragosits, U.; Olesen, J.E.; Kjeldsen, Chris; Drouet, J.L.; Cellier, P..
The aim of this study is to illustrate the importance of farm scale heterogeneity on nitrogen (N) losses in agricultural landscapes. Results are exemplified with a chain of N models calculating farm-N balances and distributing the N-surplus to N-losses (volatilisation, denitrification, leaching) and soil-N accumulation/release in a Danish landscape. Possible non-linearities in upscaling are assessed by comparing average model results based on (i) individual farm level calculations and (ii) averaged inputs at landscape level. Effects of the non-linearities that appear when scaling up from farm to landscape are demonstrated. Especially in relation to ammonia losses the non-linearity between livestock density and N-loss is significant (p > 0.999), with...
Tipo: Journal paper Palavras-chave: Air and water emissions; Landscape and recreation; Farm nutrient management.
Ano: 2011 URL: http://orgprints.org/19043/4/19043.pdf
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Energiforbrug i forskellige dyrkningssystemer Organic Eprints
Halberg, Niels; Refsgaard, Karen; Dalgaard, Tommy.
Energiforbruget i jordbrugsproduktionen er interessant både fra et ressource synspunkt og fordi udledningen af CO2 fra forbrænding af fossil energi bidrager til drivhuseffekten. Både i målsætningerne for den danske Landsforening for økologisk jordbrug (LØJ) og i landboorganisationernes oplæg til Godt landmandsskab år 2000 indgår desuden mål om at reducere forbruget af fossil energi og få den bedst mulige energiudnyttelse. Ved en kombination af studier i økologiske og konventionelle kvægbrug og brug af standardværdier for dieselforbrug til de enkelte markoperationer er der opstillet modeller for energiforbruget i mark og stald. I energiregnskaberne indgår både det direkte (diesel + el) og det indirekte energiforbrug (f.eks. energi medgået til produktion af...
Tipo: Conference paper, poster, etc. Palavras-chave: Production systems Recycling; Balancing and resource management.
Ano: 1999 URL: http://orgprints.org/6554/1/6554.pdf
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Hvordan beskytter økologisk jordbrug biodiversiteten? Organic Eprints
Dalgaard, Tommy.
Økologisk jordbrug beskytter naturen med sin pesticidfri dyrkning og mindre brug af gødning, men en række andre faktorer er lige så vigtige for beskyttelsen af agerlandets biodiversitet, viser ny forskning. Det gælder fx beskyttelsen af småbiotoper, den tidsmæssige kontinuitet af økologisk drevne arealer, og udviklingen af nye driftsformer og produktionslandskaber, der i særlig grad tager hensyn til naturen.
Tipo: Newspaper or magazine article Palavras-chave: Air and water emissions; Biodiversity and ecosystem services; Landscape and recreation.
Ano: 2011 URL: http://orgprints.org/19050/4/19050.pdf
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Kan økologisk jordbrug være med til at løse verdens klimaproblemer? Organic Eprints
Olesen, Jørgen E.; Dalgaard, Tommy.
En fremtidig energiproduktion i økologisk jordbrug bør tænkes ind i en større sammenhæng, både på bedriften og i landskabet, så der også kan opnås andre miljø, naturmæssige og økonomiske fordele. Sker dette kan økologisk jordbrug blive selvforsynende med energi og bidrage afgørende til bæredygtigheden i samfundet.
Tipo: Newspaper or magazine article Palavras-chave: Air and water emissions.
Ano: 2006 URL: http://orgprints.org/11309/1/klima_jeo.doc
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Landscape Agroecology: managing interactions between agriculture, nature and socio-economy Organic Eprints
Dalgaard, Tommy.
State of the art GIS and database technologies for landscape scale analysis and the modelling of land use and environmental impacts are presented. These methods have been developed at University of Aarhus in multidisciplinary collaboration with other research institutions throughout Europe; for example during the EU research projects www.mea-scope.org and www.sensor-ip.eu. In the years to come, these landscape scale research methods are further developed and integrated with similar frameworks in other EU countries, and used for scenario studies (see for example the landscape components of http://www.nitroeurope.eu/, http://www.darcof.dk/research/darcofiii/refugia.html or http://www.darcof.dk/research/darcofiii/bioconcens.html). Scenario studies,...
Tipo: Book chapter Palavras-chave: Landscape and recreation; Biodiversity and ecosystem services; Air and water emissions.
Ano: 2009 URL: http://orgprints.org/19313/1/19313a.pdf
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Mapping leaf nitrogen and leaf area index in European landscapes using high spatial resolution satellite data and the REGularized canopy reFLECtance (REGFLEC) model Organic Eprints
Boegh, E.; Houborg, R.; Bienkowski, J.; Dalgaard, Tommy; Dragisits, U.; Magliulo, E..
Leaf biochemistry and biophysical parameters are important for simulating soil‐vegetation‐atmosphere exchanges of energy, water, CO2 and ammonia. The accumulation of leaf nitrogen (N) in vegetation canopies is a major component of the ecosystem N balance, and leaf N concentration and leaf area index (LAI) are important determinants of the maximum CO2 uptake by plants and trees. In NEU, high spatial resolution remote sensing data from the SPOT satellite were acquired to prepare maps of leaf N and LAI for 5 European landscapes. Mapping was conducted using the REGFLEC model which is an automatic and image‐based methodology developed for regional chlorophyll (Cab) and LAI estimation (ie. Houborg and Andersen, JARS 3, 2009). REGFLEC combines models for...
Tipo: Conference paper, poster, etc. Palavras-chave: Air and water emissions; Biodiversity and ecosystem services; Landscape and recreation.
Ano: 2011 URL: http://orgprints.org/19047/4/19047.pdf
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Materials and Methods REFUGIA project working paper Organic Eprints
Dalgaard, Tommy.
The organic farming structure has been analysed for all farms in Denmark 2005-2010. In 2005, the average farm size for organic farms was 50 ha, compared to 40 ha for conventional farms. For organic farms the largest average farm size in on sandy soils and for cattle farms, whereas the for conventional farms, the largest farms are on loamy soils, and cash crop, and pig farms. The farms has been classified into farm types accoring to the EUROSTAT methods. Hobby farms are defined with a number of standard working hours under 1871 timer/år (typically under 10-25 ha). These farms normally are not included in national statistics, but are important to include in the REFUGIA studies, because these farms are important for biodiversity and have a relatively higher...
Tipo: Working paper Palavras-chave: Farm economics; Air and water emissions; Biodiversity and ecosystem services; Landscape and recreation; Denmark; Farm nutrient management.
Ano: 2011 URL: http://orgprints.org/18941/1/18941.pdf
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Økologisk jordbrug beskytter biodiversiteten Organic Eprints
Dalgaard, Tommy.
Økologisk jordbrug beskytter naturen med sin pesticidfri dyrkning og mindre brug af gødning, men en række andre faktorer er lige så vigtige.
Tipo: Newspaper or magazine article Palavras-chave: Air and water emissions; Biodiversity and ecosystem services; Landscape and recreation.
Ano: 2010 URL: http://orgprints.org/19049/4/19049.pdf
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Økologisk jordbrug som refugier for biodiversitet (Refugia) Organic Eprints
Andersen, Liselotte Wesley; Marchi, Chiara; Strandberg, Beate; Bruus Pedersen, Marianne; Damgaard, Christian; Jensen, Thomas Secher; Olsen, Kent; Dalgaard, Tommy; Topping, C.J..
• Økologiske marker har mere ukrudtsbiomasse end konventionelle. • Der er flere blomstrende arter i økologiske hegn end konventionelle forudsat, at der er kontinuitet i den økologiske drift. • Der er flere små pattedyr i små økologiske biotoper end konventionelle. • Fjernmålinger fra fly eller satellit, kaldet remote sensing, kan skelne hvilken afgrødetype der dyrkes, samt forekomsten af småbiotoper. • Uanset driftformen er det vigtigt at inddrage naturhensyn i driften, dvs., at der findes ekstensivt drevne arealer (græsmarker, overdrev, enge) til natur og direkte afsatte arealer til natur.
Tipo: Other Palavras-chave: "Organics" in general; Biodiversity and ecosystem services.
Ano: 2010 URL: http://orgprints.org/23299/7/23299.pdf
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Omlægning til økologisk jordbrug i et lokalområde Scenarier for natur, miljø og produktion Organic Eprints
Langer, Vibeke; Dalgaard, Tommy; Mogensen, Lisbeth; Heidmann, Tove; Elmegaard, Niels; Odderskær, Peter; Hasler, Berit.
I det seneste tiår har økologisk landbrug fået en stærkt øget udbredelse. Hvor der i begyndelsen af 1990'erne kun var få tusinde ha, som blev drevet økologisk, er der i 2001 over 170.000 ha, svarende til ca. 6,5 procent af det samlede danske landbrugsareal. Den samfundsmæssige interesse i økologisk landbrug er i høj grad drevet af de positive virkninger på natur og miljø, som det økologiske landbrug formodes at have. Samtidig har de samfundsøkonomiske effekter ved en øget udbredelse af økologisk landbrug været diskuteret. Bl.a. på denne baggrund blev der i regi af Forskningscenter for Økologisk Jordbrug iværksat et forskningsprojekt om Samfunds- og miljømæssige konsekvenser af forskellige strategier for udvikling og udbredelse af økologiske...
Tipo: Report Palavras-chave: "Organics" in general.
Ano: 2002 URL: http://orgprints.org/3038/1/rap_12.pdf
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Omlægning til økologisk jordbrug i et lokalområde. Scenarier for natur miljø og produktion Organic Eprints
Langer, Vibeke; Dalgaard, Tommy; Heidmann, Tove; Elmegaard, Niels; Mogensen, Lisbeth; Odderskær, Peter; Hasler, Berit.
Delprojektet om Natur- og miljøscenarier formulerede 4 måder at omlægge 25% af et konkret værkstedsområde til økologisk jordbrug. I scenariet ”Mælk” var det fortrinsvis kvægbrug, der blev omlagt. Scenariet ”1997” var også domineret af mælkeproducenter, men med et tillæg af planteavlsbedrifter. Scenariet ”Planter/svin” omfattede udelukkende svine- og planteavlsbrug, og scenariet ”Selvforsyning” omfattede bedrifter i et udpeget SFL-område, som ikke måtte supplere produktionen med indkøbt foder. Resultaterne pegede på en tendens til fald i kvælstofudvaskningen i hele området i tre scenarier, mens der var uklarhed m.h.t. det fjerde - ”Planter/svin”- scenariet. Belastningen med pesticider blev reduceret. I scenarierne ”Mælk” og ”1997”var reduktionen mindre end...
Tipo: Report Palavras-chave: Nutrient turnover; Production systems; Production systems; Biodiversity and ecosystem services; Farming Systems.
Ano: 2002 URL: http://orgprints.org/1574/1/rap_12.pdf
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Organic farming and biodiversity - the impact of organic farming on nature Organic Eprints
Andersen, Liselotte Wesley; Marchi, Chiara; Strandberg, Beate; Topping, C.J.; Jensen, Thomas Secher; Olsen, Kent; Bruus Pedersen, Marianne; Damgaard, Christian; Dalgaard, Tommy.
Organic farming is generally acknowledged for its positive effects on biodiversity and other landscape services. However, the intensity of farming has changed significantly through the last decade as ranks of traditional holistic organic farmers have been joined by much more economically-driven new organic farmers. At the same time there have also been steady improvements in farming methodology and crop types resulting in efficiency in organic farming which can often rival its conventional counterparts. Therefore, large variations occur between organic farms.
Tipo: Other Palavras-chave: "Organics" in general.
Ano: 2008 URL: http://orgprints.org/23298/7/23298.pdf
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Potentialet for omlægning til økologisk jordbrug i Danmark Organic Eprints
Dalgaard, Tommy; Kjeldsen, Chris; Kristensen, Inge T.; Kristensen, Ib Sillebak.
Potentialet for omlægning til økologisk jordbrug i Danmark.
Tipo: Report chapter Palavras-chave: History of organics; Landscape and recreation; Biodiversity and ecosystem services; Farm economics; Air and water emissions.
Ano: 2008 URL: http://orgprints.org/16263/1/16263.pdf
Registros recuperados: 27
Primeira ... 12 ... Última
 

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