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| Registros recuperados: 683 | |
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| Dalgaard, Tommy; Halberg, Niels; Fenger, Jes. |
| Formålet med rapporten er at beskrive og anvende en metode til at vurdere ændringen i landbrugets forbrug af fossil energi og emission af drivhusgasser ved omlægning til 100% økologisk jordbrug i Danmark. Situationen for dansk landbrug i 1996 er sammenlignet med tre scenarier for 100% omlægning: A) Fuld selvforsyning med foder (0% import). Herved begrænses den mulige svineproduktion. B) 15% import af foder til drøvtyggere og 25% import til enmavede dyr (15-25% import). Også her begrænses svineproduktionen, men dog mindre en i scenario A. C) Fastholdelse af den samme animalske produktion som i 1996 (ubegrænset foderimport). |
| Tipo: Report |
Palavras-chave: Air and water emissions. |
| Ano: 2000 |
URL: http://orgprints.org/3031/1/Rap_05.pdf |
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| Cormack, Dr William F.. |
| This is the final report of Defra project OF0182. The attached main report starts with a more detailed Executive Summary, from which most of this text is extracted. One of the possible benefits from organic farming is a reduced, or more efficient, use of energy in agriculture. The main objective and deliverable of study OF0182 was to develop a model of energy inputs in organic farming systems. To illustrate the potential of the model, it was used to contrast organic with similar conventional systems and to highlight important differences. This was presented as a detailed written report (49 pages) to MAFF and is summarised in this document. The report and model were delivered to MAFF in March 2000. A previous study, completed by Phil Metcalfe of ADAS in... |
| Tipo: Report |
Palavras-chave: Environmental aspects; Farming Systems; Air and water emissions. |
| Ano: 2000 |
URL: http://orgprints.org/8169/1/OF0182_181_FRP.pdf |
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| Koller, Martin. |
| Erkenntnisse aus 6 Versuchen ❯ Winterfuttererbse hat sich als Gründüngungspfl anze am besten bewährt, weil damit späte Aussaaten möglich sind ❯ Im Durchschnitt wiesen die Erbsen 156 kg Stickstoff pro ha in der Grünmasse auf ❯ Ohne zusätzliche N-Düngung erzielte der Silomais einen Ertrag von durchschnittlich 177 dt TS/ha ❯ In Ackerbaufruchtfolgen passt die Erbsen-Gründüngung gut, wenn nach Getreide eine Unkrautkur durchgeführt werden soll ❯ In Gemüsebaufruchtfolgen passen die Erbsen nach Lagerkulturen und vor Folgekulturen, die Ende Mai gepflanzt oder gesät werden ❯ Saatzeitpunkt: Anfangs Oktober (Überwinterung im 2-4 Blattstadium), Saaten bis in den Dezember möglich (Keimung Februar/März) ❯ Einarbeitung: Flaches Pflügen oder Scheibenegge... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm economics; Soil tillage; Air and water emissions. |
| Ano: 2011 |
URL: http://orgprints.org/18865/1/koller-2011-poster-schlatthof-fr.pdf |
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| Die Stickstoffverluste aus der schweizerischen Landwirtschaft sind trotz der abnehmenden Tendenz in den letzten Jahren noch immer zu hoch. Die mengenmässig bedeutsamsten Verluste sind Ammoniakemissionen und Nitratauswaschung. Handlungsbedarf besteht insbesondere bei den Ammoniakverlusten, die weniger stark abgenommen haben als die Nitratauswaschung. Zur Verringerung der Ammoniakverluste beim Hofdüngereinsatz müssen die Emissionen quantifiziert, die Einflussfaktoren mit ihren Wechselwirkungen identifiziert und Reduktionsmassnahmen abgeleitet und bewertet werden. Im Bereich des Feldbaus besteht Handlungsbedarf in der Abklärung des Einflusses von Bodenbearbeitung, Stickstoffdüngung und Anbausystemen (IP, BIO) und ihrer Wechselwirkungen auf die... |
| Tipo: Project description |
Palavras-chave: Nutrient turnover; Air and water emissions. |
| Ano: 2024 |
URL: http://orgprints.org/5095/1/Richner%2D2005%2DHofduengerwirtschaft.pdf |
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| Woolf, Dominic. |
| The term 'biochar' refers to black carbon formed by the pyrolysis of biomass i.e. by heating biomass in an oxygen-free or low oxygen environment such that it does not (or only partially) combusts. Traditional charcoal is one example of biochar produced from wood. The term 'biochar' is much broader than this however, encompassing black carbon produced from any biomass feedstock. The use of biochar as a soil additive has been proposed as a means to simultaneously mitigate anthropogenic climate change whilst improving agricultural soil fertility. This paper provides a review of what is known about both of these claims and also about the wider environmental implications of the adoption of this process. The intention of this review is not... |
| Tipo: Report |
Palavras-chave: Nutrient turnover; Soil quality; Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/13268/1/Biochar_as_a_soil_amendment_%2D_a_review.pdf |
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| Schäfer, Winfried. |
| Assessment results of renewable energy supply in agriculture and forestry are often questionable because 1. the methodology does not describe the nature dependent conditions of agricultural production, 2. there is no standard system boundary, 3. thermodynamic laws are violated and/or ignored, 4. direct and embodied energy is mixed, 5. the mainstream life cycle analysis (LCA) takes downstream and upstream inputs arbitrarily into consideration, depending on the research objectives and the research-funding agency. Thus, the calculation results neglect a wide range of specific energy input figures of upstream and downstream factors outside farm level resulting in non-comparable figures. The EROI describes the ratio between energy output and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Air and water emissions. |
| Ano: 2016 |
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| Hansen, Sissel; Rivedal, Synnøve; Øpstad, Samson; Heggset, Sverre; Deelstra, Johannes; Dörsch, Peter. |
| We studied greenhouse gas (GHG) emissions (CH4 and N2O), agronomic performance and soil conditions in a grassland on an inverted peat soil that was earlier cultivated and tile-drained, and compared it with grassland on conventionally tile-drained peat. A neighbouring undrained peat was used as a reference for GHG emissions. Preliminary results (2-year field data) revealed reduced GHG emissions from the inverted peat relative to the tile-drained peat, mainly caused by lower CH4 emissions. Our data suggest that peat inversion can improve the agronomic feasibility of forage production in cool-moist areas with abundant organic soils, and can offer a way of agronomic adaptation to a climate with increased precipitation. At the same time it may reduce the GHG... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Air and water emissions; Irrigation and drainage. |
| Ano: 2016 |
URL: http://orgprints.org/31203/1/Hansen%20et%20al%202016%20GHG%20emissions_agronomic%20feasibility_%20inverted%20peat%20soil.%20%20EGF%204-8%20Sept.%20Trondheim%2C%20Abstract.pdf |
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| Hospers-Brands, A.J.T.M.; Anema, D.; Bus, M.C.. |
| 2013 was the second year of the "PlantyOrganic" system development in practice. The six-year rotation is laid out and measurements took place at soil and crop. With the exception of the potatoes in 2013 all crops had the pre-crop as foreseen in the design. The fertilizers used were completely produced in the own system, as foreseen in the system design. The amounts of nitrogen applied were about 45 % higher than in the design. Soil nitrogen is measured and used as input in the nitrogen model NDICEA. There was a sufficient match between measured and calculated level of soil mineral nitrogen. The crops performed well, with a high yield in carrots and oats, and a disappointing yield in wheat. In wheat nitrogen was limiting for the yield, we do not yet have a... |
| Tipo: Report |
Palavras-chave: Nutrient turnover; Air and water emissions; Farm nutrient management. |
| Ano: 2014 |
URL: http://orgprints.org/26064/1/2892.pdf |
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| Niggli, Urs; Fleissbach, A.; Hepperly, P.; Scialabba, N.. |
| Může zemědělství s nízkými emisemi skleníkových plynů(Green House Gases – GHG) vůbec fungovat? A je vlastně žádoucí? Při hledání odpovědí na tyto dvě základní, avšak nesmírně relevantní otázky, předložená studie prověřuje současné zemědělské postupy, které dává do souvislostí s vědeckými databázemi dlouhodobých polních pokusů a používá je jako případové studie zemědělství s nízkými emisemi skleníkových plynů. Navíc se za-bývá změnami potřebnými k tomu, aby se zemědělské systémy s nízkými emisemi GHG staly realitou. Dále objasňuje adaptační kapacitu agroekologických zemědělských systémů a využívá přitom případové studie o ekologickém zemědělství z odborné literatury. Emise způsobené zemědělstvím představují ročně 10–12 % veškerých emisí GHG, tedy 5,1 až... |
| Tipo: Book |
Palavras-chave: Air and water emissions. |
| Ano: 2011 |
URL: http://orgprints.org/20478/1/web_klima.pdf |
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| Niggli, U.; Fließbach, A.; Hepperly, P.; Scialabba, N.. |
| Is low greenhouse gas emission (GHG) agriculture possible? Is it, in fact, desirable? In seeking answers to these two basic but extremely relevant questions, this study examines current farming practices, and incorporates scientific databases from longterm field experiments as case studies for low GHG agriculture. Further, the study examines the changes that will be needed for low greenhouse gas agriculture systems to become a reality. It also elucidates the adaptive capacity of agro-ecological farming system approaches, using organic system case studies from the scientific literature. Each year, agriculture emits 10 to 12 percent of the total estimated GHG emissions, some 5.1 to 6.1 Gt CO2 equivalents per year. Smith, et al. (2007) and Bellarby, et al.... |
| Tipo: Book |
Palavras-chave: Environmental aspects; Air and water emissions. |
| Ano: 2009 |
URL: http://orgprints.org/15690/1/niggli-etal-2009-lowgreenhouse.pdf |
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| Chirinda, N.; Carter, M.S; Albert, K.R.; Ambus, P.; Olesen, J.E.; Porter, J.R.; Petersen, S.O.. |
| Conventional cropping systems rely on targeted short-term fertility management, whereas organic systems depend, in part, on long-term increase in soil fertility as determined by crop rotation and management. Such differences influence soil nitrogen (N) cycling and availability through the year. The main objective of this study was to compare nitrous oxide (N2O) emissions from soil under winter wheat (Triticum aestivum L.) within three organic and one conventional cropping system that differed in type of fertilizer, presence of catch crops and proportion of N2-fixing crops. The study was replicated in two identical long-term crop rotation experiments on sandy loam soils under different climatic conditions in Denmark (Flakkebjerg–eastern Denmark and... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems; Air and water emissions; Environmental aspects. |
| Ano: 2010 |
URL: http://orgprints.org/18510/1/chirinda_et_al_2010_%28N2O%29.pdf |
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| Christensen, B.T.; Rasmussen, J.; Eriksen, J.; Hansen, E.M.. |
| The inclusion of leys in arable cropping is generally found to improve soil fertility. The effect of leys depends on their botanical composition and management, but the significance of individual management factors remains confounded in most studies. We quantified the effects of one- to six-year-old pure grass leys on soil C (0-20 cm) and yields of three subsequent test crops of spring barley (Hordeum vulgare) under-sown with Italian ryegrass (Lolium perenne). Each ley was a mixture of four grass species (Lolium perenne, Festuca pratensis, Phleum pratense, Poa pratensis), exposed to three to four cuts annually. Only mineral fertilizers were applied (225 kg N ha-1 yr-1). The yield of barley was tested at six rates of N fertilizer (0 to 150 kg N ha-1). The... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Air and water emissions. |
| Ano: 2009 |
URL: http://orgprints.org/16289/1/16289.pdf |
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| Hörtenhuber, Stefan; Zollitsch, Werner. |
| The aim of this study was to analyse the potential greenhouse gas emissions (GHGE) of locally and regionally produced, alternative protein‐rich feedstuffs (APRFs) which can be utilised in dairy cattle feeding as compared to extracted soybean meal (SBME) in a complete life‐cycle chain for Austria. In addition to GHGE from soil (N2O), from the production of mineral fertilizers and pesticides, industrial processes (oil milling, distillery, and drying plant) and use of fuels, the effects of land use change (LUC) were included in the calculation of GHGE. Currently, SBME, which is mainly imported from South‐America, is the most important protein feedstuff for livestock in Austria, but recently it was started to replace it by APRFs in diets for dairy cows for... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle; Feeding and growth; Air and water emissions. |
| Ano: 2010 |
URL: http://orgprints.org/17994/1/hoertenhuber-zollitsch-2010-ifsa.pdf |
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| Chatskikh, D.; Olesen, J.E.; Berntsen, J.; Regina, K.; Yamulki, S.. |
| Nitrous oxide (N2O) is a potent greenhouse gas with a high contribution from agricultural soils and emissions that depend on soil type, climate, crops and management practices. The N2O emissions therefore need to be included as an integral part of environmental assessment of agricultural production systems. A dynamical algorithm for N2O production and emission from agricultural soils was developed and included in the FASSET whole-farm model. The model simulated carbon and nitrogen (N) turnover on a daily basis. Both nitrification and denitrification was included in the model as sources for N2O production, and the N2O emissions were simulated to depend on soil microbial and physical conditions. The model was tested on experimental data of N2O emissions from... |
| Tipo: Journal paper |
Palavras-chave: Pasture and forage crops; Air and water emissions. |
| Ano: 2005 |
URL: http://orgprints.org/1808/2/1808.pdf |
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| In many intensively cultivated areas, surface and ground waters suffer from eutrophication and deterioration of the water quality: To improve the environmental protection actions of agriculture, EU countries have adopted common legislation, such as Nitrate Directive and the Water Framework Directive, which set limits to the use of manure and aim at good ecological state of waters by 2015, respectively. Moreover, different voluntary measures and environmental schemes are being supported financially by EU and national goverments to reduce agricultural nutrient loading and eutrophication, for instance by optimizing phosphorus (P) and nitrogen (N) fertilization, controlling erosion and promoting the establishment of buffer zones and wetlands. Yet, good... |
| Tipo: Proceedings |
Palavras-chave: Air and water emissions. |
| Ano: 2010 |
URL: http://orgprints.org/17182/1/novel.pdf |
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| Registros recuperados: 683 | |
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