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| Registros recuperados: 13 | |
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| Johansen, A.; Hauggaard-Nielsen, H.; Ambus, P.; Dalgaard, T.; Jørgensen, U.; Nielsen, A.M.; Nielsen, L.H.; Olesen, J.E.; Roepstorff, A.; Skytte, K.; Smith, J.E.; Thomsen, A.B.; Carter, M.S.; Jensen, E.S.. |
| Production of bioenergy in organic agriculture may be implemented in the future to reduce the reliance on non-renewable fossil fuels and minimize greenhouse gas (GHG) emissions. Therefore it is important to assess the potential effect this may have on soil quality and biological parameters. This project aims at designing and evaluate a combined concept for biomass and bio-energy production in OA, while considering soil bio-geo-chemical cycling of plant nutrients and biodiversity of the soil microbiota. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services; Soil quality; Air and water emissions; Farm economics; Farm nutrient management; Quality and evaluation of inputs. |
| Ano: 2008 |
URL: http://orgprints.org/15157/1/15157.pdf |
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| Jensen, E.S.. |
| Analyser af fødevareproduktionens energiforbrug viser, at økologiske fødevarer pr. produceret kg kun har et marginalt lavere energiforbrug end konventionelle produkter. I lighed med samfundets øvrige sektorer er det økologiske jordbrug stærkt afhængig af fossil energi til produktion, forarbejdning og afsætning. Der synes at have hersket et modsætningsforhold mellem de grundlæggende principper for økologisk jordbrug (ØJ) og interessen for at producere bioenergi. Skal vi i ØJ forsøge at leve op til principperne om primært at basere produktionen på fornybare ressourcer og dermed sørge for, at økologisk jordbrug påny får førertrøjen på i udviklingen af fødevareproduktionen i en mere bæredygtig retning? |
| Tipo: Newspaper or magazine article |
Palavras-chave: "Organics" in general. |
| Ano: 2006 |
URL: http://orgprints.org/11442/1/11442.pdf |
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| Rasmussen, J.; Eriksen, J.; Jensen, E.S.; Høgh-Jensen, H.. |
| Grass-clover mixtures are essential in many low-N-input cropping systems, but the importance of various root fractions for the below-ground N dynamics are not well understood. This may be due to the difficulties of studying root longevity and turnover in situ in mixtures. The present field study, investigated (1) the development in root biomass over two growing seasons and (2) the turnover of dual N-15- and C-14-labelled ryegrass and white clover root material. Litter bags containing various dual-labelled plant materials were incubated in cylinders inserted in the topsoil of a young ryegrass-clover ley. Disappearance of C-14 and N-15 from the litter bag material were studied for 1 year following incubation. Four times during two growing seasons, roots were... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems; Biodiversity and ecosystem services. |
| Ano: 2010 |
URL: http://orgprints.org/17875/4/17875.pdf |
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| Berntsen, J.; Hauggaard-Nielsen, H.; Olesen, J.E.; Petersen, B.M.; Jensen, E.S.; Thomsen, A.. |
| The FASSET whole farm model was extended with a sub-model for competition between several plant species for light, water and nitrogen. The new model was tested on intercrops of pea (Pisum sativum L.) and spring barley (Hordeum vulgare L.). A three-year dataset on pea and barley sole crop growth was used for calibration. Two datasets that included detailed measurements of crop production, nitrogen uptake and leaf area indices from two sites were used for testing. An arable organic experiment from three sites including several treatments over four years was also used for testing. The model predicted the increase in resource utilisation of pea and barley and effects on pea symbiotic nitrogen fixation satisfactorily. The effects of pea interspecific... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions. |
| Ano: 2004 |
URL: http://orgprints.org/4052/1/4052.pdf |
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| Råberg, T.; Kreuger, E.; Björnsson, L.; Jensen, E.S.. |
| This project investigates strategic management of nitrogen by integrating crop residue management with biogas production. The approach offers potential for diversified farmer income, as food crops, feedstock for biogas and digestate for nutrient cycling are produced simultaneously. This type of diversification provides multifunctional solutions in organic farming, especially in production without access to animal manure. Biogas production from crop residues offers the possibility of reducing both emissions and leaching of nutrients to the surrounding ecosystems, as compared to the case where crop residue is incorporated into the soil for decomposition (Baggs et al. 2000; Velthof et al. 2002). This type of multifunctional cropping system provides solutions... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Recycling; Balancing and resource management Farm nutrient management. |
| Ano: 2013 |
URL: http://orgprints.org/24556/1/24556.pdf |
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| Rasmussen, J.; Gjettermann, B.; Eriksen, J.; Jensen, E.S.; Høgh-Jensen, H.. |
| The below ground C and N dynamics leading to organic and inorganic N leaching from perennial ryegrass-clover mixtures are not well understood. Based on the hypothesis that four different plant materials would degrade differently, a 16 months field experiment was conducted to determine (i) the source strength of labelled plant residues in dissolved inorganic N (DIN) and dissolved organic N (DON) in pore water from the plough layer, and (ii) the plant uptake of organically bound N. Litterbags containing 14C- and 15N-labelled ryegrass or clover roots or leaves were inserted into the sward of a ryegrass-clover mixture in early spring. The fate of the released 14C and 15N was monitored in harvested biomass, roots, soil, and pore water percolating from the... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Soil biology; Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/16290/1/16290.pdf |
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| Oleskowicz-Popiel, P; Ambus, P; Carter, M.S.; Dalgaard, T.; Hauggaard-Nielsen, H; Johansen, A; Jørgensen, U; Nielsen, A.M; Nielsen, H.B.; Nielsen, L.H; Olesen, J.E.; Roepstorff, A; Skytte, K; Schmidt, J.E.; Thomsen, A.B.; Thomsen, M.H.; Jensen, E.S.. |
| The research programme called “international research cooperation and organic integrity” was commenced for a period 2006-2010. It is coordinated by DARCOF (The Danish Research Centre for Organic Farming). The whole programme, with acronym DARCOF III, consists of 15 projects (http://www.darcof.dk/research/darcofiii/index.html). One of them is BIOCONCENS - Biomass and bioenergy production in organic farming – consequences for soil fertility, environment, spread of animal parasites and socio-economy (http://www.bioconcens.elr.dk/uk/). The production of bioenergy in organic agriculture (OA) can reduce its dependency of fossil fuels and decrease green house gasses emission; consequently it will increase sustainability of organic farms. Biorefinery concept based... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services Recycling; Balancing and resource management Technology assessment. |
| Ano: 2008 |
URL: http://orgprints.org/14406/1/poster_Oleskowicz%2Dpopiel.pdf |
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| Pugesgaard, S.; Dalgaard, T.; Jørgensen, U.; Olesen, J.E.; Møller, H.; Jensen, E.S.. |
| Can biogas and bioethanol production make organic farming more sustainable? - Results from a model for the fossil energy balance, Nitrogen losses, and greenhouse gas emissions in a 1000 ha energy catchment with organic dairy farming and integrated biogas and bioethanol production. Dalgaard T1, Pugesgaard S1, Jørgensen U1, Olesen JE1, Møller HB1 and Jensen ES2 1) Dept. Agroecology and Environment. Faculty of Agricultural Sciences (DJF), University of Aarhus. DK-8830 Tjele. Denmark. Contact: tommy.dalgaard@agrsci.dk 2) Biosystems Department, Risø DTU, The National Laboratory for Sustainable Energy, The Technical University of Denmark DK-4000 Roskilde, Denmark The vision of organic farming systems, independent of fossil energy resources, with... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management; Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/14801/1/14801.pdf |
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| Hauggaard-Nielsen, H; Ambus, P; Dalgaard, T; Johansen, A; Jørgensen, U; Nielsen, A.M.; Nielsen, L.H.; Olesen, J.E.; Roepstorff, A; Skytte, K; Smith, J.E.; Thomsen, A.B.; Thomsen, M.H.; Jensen, E.S.. |
| Energy production and energy use in organic agriculture (OA) need to be addressed in order to reduce the reliance on non-renewable fossil fuels and minimize greenhouse gas (GHG) emissions. Thus, there is an obligation to find consensus between the apparent opposing aims of renewable (bio) energy production and soil fertility in OA. This project aims at designing and evaluate a combined concept for biomass and bio-energy production in OA, while considering soil fertility. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management; Biodiversity and ecosystem services; Social aspects; Technology assessment; Air and water emissions; Farm economics. |
| Ano: 2007 |
URL: http://orgprints.org/11312/1/NJF2007%2DBioConcens.pdf |
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| Registros recuperados: 13 | |
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