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| Registros recuperados: 43 | |
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| Knudsen, Marie Trydeman; Dorca-preda, Teodora; Djomo, Sylvestre Njakou; Kristensen, Troels; Ambye-Jensen, Morten; Møller, Henrik B.; Dupont, Y.L.; Cong, W-F; Eriksen, Jørgen. |
| Including grass leys in organic arable rotations has potentially several benefits such as suppression of certain weeds, increased biodiversity (i.e. pollinators), increased soil carbon sequestration and productivity among others. The biomass from the grass mixtures can be refined into protein feed concentrate for monogastrics that can partly replace imported soybean, while the fibre fraction can be used as ruminant feed or for biogas. The grass mixtures can also be used directly for biogas. Increasing diversity of the mixtures will potentially also increase the yield stability and the benefits for biodiversity (pollinators), while the number of cuts per year will also have an effect. Thus, the use of multispecies mixtures in organic arable rotation for... |
| Tipo: Journal paper |
Palavras-chave: Air and water emissions; Biodiversity and ecosystem services. |
| Ano: 2020 |
URL: http://orgprints.org/35188/1/Knudsen%20et%20al.%20%28manuscript%29%20Environmental%20LCA%20of%20organic%20grass%20protein.doc |
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| Munk, Arne; Vestergaard, Mogens; Kristensen, Troels. |
| Sammenfattende viser resultaterne, at LIM x DH tyre kan opdrættes i et græsbaseret produktionssystem med et forholdsvis fornuftigt restbeløb. Med økologitillæg og forventet slagtepræmie i perioden 2015-2020, kan der opnås et restbeløb til dækning af stald, arbejde og risiko på cirka 1.800 kr. per dyr (ca. 3,50 kr. per dag), selv om der gives et tillæg på 800 kr. per spædkalv i forhold til prisen på en renracet DH-tyr. For LIM x DH kvier kan der opnås et restbeløb på cirka 1.400 kr. per dyr (2,70 kr. per dag). Hvis krydsningstyrene og kvierne ses under et, kan der således opnås et restbeløb på cirka 1.600 kr. per krydsningsdyr (godt 3 kr. per dag) i gennemsnit under de nævnte forudsætninger. Med et restbeløb på 390 kr. per dyr er der ikke økonomi i at... |
| Tipo: Report |
Palavras-chave: Farm economics; Farming Systems; Beef cattle. |
| Ano: 2014 |
URL: http://orgprints.org/27960/7/27960.pdf |
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| Fretté, Xavier C.; Kristensen, Troels; Eriksen, Jørgen; Søegaard, Karen; Sørensen, John; Nielsen, Jacob H.. |
| A grazing study was performed in 2006 over three two-week periods in May, June and August at the organic research station Rugballegaard, Denmark, where a herd of 48 Holstein dairy cows was split into four groups of 12 cows. Each group grazed one of four swards: 1) lucerne, 2) red clover, 3) white clover and 4) white clover with chicory, all four in mixture with perennial ryegrass. Milk and grass samples were analyzed to study the effect of each sward type on milk composition as well as seasonal variations. |
| Tipo: Working paper |
Palavras-chave: Denmark. |
| Ano: 2008 |
URL: http://orgprints.org/14796/1/Artikel_milk%2Dgrass%2Dcomposition%2D2008%2D09%2D23.doc |
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| Andersen, Charlotte; Nielsen, Tina Skau; Purup, Stig; Kristensen, Troels; Eriksen, Jørgen; Søegaard, Karen; Sørensen, John; Fretté, Xavier C. |
| A grazing experiment was carried out to study the concentration of phyto-oestrogens in herbage for cattle and in milk during two periods (May and June). Forty-eight Danish Holstein cows were divided into four groups with four treatment diets; white clover, red clover, lucerne and chicory-rich pastures. Each experimental period lasted 15 days. Herbage samples from the first day and individual milk samples from the last day of the experimental period were analysed for phyto-oestrogens using LC-MS technique. The total concentration of phyto-oestrogens was 21 399 mg/kg DM for red clover and 238-466 mg/kg DM for the other three herbages mainly due to a much higher concentration of biochanin A, formononetin and glycitein in red clover. In the milk, the total... |
| Tipo: Journal paper |
Palavras-chave: Health and welfare. |
| Ano: 2009 |
URL: http://orgprints.org/16072/1/16072.pdf |
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| Vestergaard, Jannie S.; Kristensen, Troels; Søegaard, Karen; Bredie, Wender L.P.. |
| In recent years, the Danish milk market has shown an increase in the consumption of organic milk as well as a growing variety of milk with specific features including farm milk. The production of milk from a single farm and pasture-based (PB) feeding regimes is of special interest as it implies a “sense of place” or terroir. The PB feeding regimes vary with season and might also vary on a day-to-day basis. It is therefore important to understand the impact of the feed on the sensory properties of the milk [1]. This study aims at demonstrating how analytical sensory analysis can provide important information about the influence of breed, season and variation in farm management from PB feeding regimes on the sensory properties of organic farm milk. The... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health. |
| Ano: 2009 |
URL: http://orgprints.org/16354/2/16354a.pdf |
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| Oudshoorn, Frank; Kristensen, Troels; Nadimi, Esmaeil. |
| The objective of this paper was to investigate the effect of limited grazing time on urination and defecation frequency, spatial distribution of excrement in the paddock, and the resulting nitrogen balance at animal and field level. During a 6-week period in early summer, 60 Holstein Frisian dairy cows (31.0±5.4 kg ECM) were randomly allocated to three different treatments, with grazing at clover-grass pasture during daytime for 4, 6.5 or 9 h daily. Indoor feeding, with a mixture of roughage and concentrates (13% crude protein), was restricted for treatment 4 and 6.5 h to the amount the 9-h treatment could eat. Cows allowed grazing at pasture for 4 h moved more rapidly during pasture, moved longer distance per active hour and used a higher proportion of... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Air and water emissions. |
| Ano: 2008 |
URL: http://orgprints.org/13856/1/13856.pdf |
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| Fretté, C.; Kristensen, Troels; Eriksen, J.; Søegaard, Karen; Sørensen, John; Wiking, L.; Nielsen, J.H.. |
| Because of its high saturated fatty acid (FA) content milk fat is considered hypercholesterolemic. Intake of unsaturated FA (UFA) reduces the plasma cholesterol concentrations. Especially conjugated linoleic acids (CLA) have shown positive effects on cardiovascular diseases, prevention of cancer and obesity. The aim of our project is to investigate how grazing can enhance the content of these beneficiary FA in milk. For bith types of cow races we observed no direct effect of increased grazing in the diet on the short chain FA (SCFA) content in milk, implying that the de novo synthesis of these FA remained unaffected. Regarding the content of CLA c9,t11 there was a strong positive effect on Holstein milk (R2 = 0,88), but almost none on Jersey milk when the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Feeding and growth. |
| Ano: 2009 |
URL: http://orgprints.org/16366/1/16366.pdf |
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| Lehmann, Jesper Overgård; Mogensen, Lisbeth; Kristensen, Troels. |
| The concept of extended lactation is supposed to improve cow health and productivity and at the same time reduce greenhouse emission from high-yielding organic dairy cows in a product perspective. This effect is achieved through fewer calvings per year and hence a production of fewer replacement heifers, which then reduces the annual herd requirement for feed. We believe that the average milk yield per feeding day – days lactating plus days dry – per cow will be unchanged. However, this requires that the average cow will have to produce milk for a longer timeframe, and thus they will become older before being culled. We believe this will be a derived effect of the improved cow health as the majority of disease incidences occur around the time of calving.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems; Dairy cattle; Air and water emissions. |
| Ano: 2014 |
URL: http://orgprints.org/23572/1/23572_MM.pdf |
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| Sehested, Jakob; Kristensen, Troels. |
| På den økologiske forsøgsstation Rugballegaard blev der i 1996 etableret tre produktionssystemer omfattende husdyr og sædskifte. Formålet var at belyse de overordnede bedriftsmæssige konsekvenser af økologiske produktionssystemer med kombinationer af kvæg og svin i forhold til specialiseret produktion af kvæg henholdsvis svin. Dette indlæg omhandler resulter vedrørende køerne og mælkeproduktionen. Formålet med forsøgene med malkekvægbesætningen var at undersøge malkekøernes produktion, reproduktion, sundhed og foderudnyttelse samt mælkens kvalitet, når køerne blev fodret på et reduceret niveau med grovfoder alene (primært frisk og/eller konserveret kløvergræs) eller suppleret med små mængder tilskudsfoder først i laktationen. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Dairy cattle. |
| Ano: 2001 |
URL: http://orgprints.org/111/1/Microsoft_Word_%2D_Okotema_2001.pdf |
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| Mogensen, Lisbeth; Kristensen, Troels. |
| Ved ad libitum foder med en stor andel kløvergræsensilage af god kvalitet gav en ration med byg som tilskudsfoder den samme ydelse som en ration med rapskage og byg . Ved en mindre gunstig grovfodersituation var der en stor effekt af en A-blanding som tilskudsfoder i stedet for byg. Selv ved en stor andel ad libitum foder af god kvalitet kunne grønpiller af standard kvalitet erstatte byg på tørstofbasis uden at EKM-ydelsen faldt signifikant. Ved samme areal til rådighed pr. ko, resulterer dyrkning af raps, byg og hvede og efterfølgende fodring med valsede rapsfrø og byg/hvede i en ændret sammensætning af mælken, men samme eller højere EKM-ydelse sammenlignet med dyrkning af og fodring med byg. |
| Tipo: Report chapter |
Palavras-chave: Dairy cattle. |
| Ano: 2001 |
URL: http://orgprints.org/1654/1/Maelkeprod.doc |
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| Mogensen, Lisbeth; Kristensen, Troels. |
| An experiment was carried out to investigate the effects of barley or rape seed cake as supplement to silage given ad libitum on milk production and health of dairy cows. A total of 103 cows were divided into two groups on two farms. Before the experiment, the cows had an average milk yield of 26.9 kg ECM and they were in milk for an average of 99 days. Their average parity was 2.3 and their weight 596 kg. The cows in each group received either solely barley or an isoenergetic mixture of rape cake seed and barley as supplement. The supplement feed was fed frequently by automatic feeding. A mixture of clover grass silage and whole crop silage was fed ad libitum. The daily milk yields were not significantly different in the barley and rape seed cake... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle. |
| Ano: 2002 |
URL: http://orgprints.org/1342/1/Acta_LIM_2002_52.pdf |
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| Mogensen, Lisbeth; Kristensen, Troels; Sehested, Jakob. |
| Kapitlet omhandler tilskudsfoder til en vintergrundration, som primært består af kløvergræsensilage. Resultaterne er baseret på en række forsøg på Studielandbrug og Den Økologiske Forsøgsstation Rugballegård. Korn indgår i alle delforsøgene som den ene behandling i sammenligning med tilskudsfodermidler, som bidrager med en større mængde protein, fedtsyrer eller cellevægge. I nogle forsøg er tilskudsfodermidlerne substitueret på grundlag af fylde, og i andre på grundlag af udbyttet på et givet areal. Proteinrige tilskudsfodermidler gav ved en grundration med højt stivelsesindhold og lav proteinværdi samme eller højere energikorrigerede mælkeydelse end byg. Ved kvotebegrænsning var mælkeindtægten stort set uafhængig af, hvilket tilskudsfoder der blev... |
| Tipo: Report chapter |
Palavras-chave: Production systems. |
| Ano: 2002 |
URL: http://orgprints.org/200/1/Microsoft_Word_%2D_nr_17_kap_3.pdf |
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| Kristensen, Troels; Søegaard, Karen. |
| Andelen af hvidkløver i afgræsningsmarker bestemt ved visuel vurdering overvurderer indholdet af hvidkløver i forhold til botanisk bestemmelse baseret på planteprøver som håndsorteres. Forskellen er størst i foråret ved lille afgræsningshøjde. Ved bedømmelser af hvidkløverandelen ved 20 til 50 stikprøver fordelt tilfældigt på større arealer kan den visuelt bestemte kløverandel omregnes til botanisk bestemt indhold ved de udledte ligninger, med en sikkerhed på 2-3%-enheder. |
| Tipo: Working paper |
Palavras-chave: Pasture and forage crops. |
| Ano: 2010 |
URL: http://orgprints.org/18058/1/18058.pdf |
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| Vaarst, Mette; Weisbjerg, Martin Riis; Kristensen, Troels; Thamsborg, Stig Milan; White, Andrew; Roderick, Stephen; Lockeretz, Willie. |
| Animals are important in organic farming systems, both as a part of the concept and in practice, where there is great weight on forming an integrated system with harmony between the land, the animals and the people, involving local recirculation of feed and manure. Good animal health and welfare is an important goal for organic husbandry. In contrast to crops, animals are not just parts of the farming system, they are also sentient creatures and as such they deserve special moral consideration. They are individuals that need to be cared for, they can suffer, and they can interact with each other and with the humans and environment around them. Animal management is, therefore, very different from crop management. Humans have a moral obligation to treat... |
| Tipo: Book chapter |
Palavras-chave: Health and welfare. |
| Ano: 2006 |
URL: http://orgprints.org/13735/1/13735.pdf |
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| Registros recuperados: 43 | |
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