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| Registros recuperados: 10 | |
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| Strøm, Turid; Hansen, Sissel; Govasmark, Espen. |
| For alle mineralene unntatt klor var det et høgere innhold i 2. slått enn i 1. slått. Flere av planteprøvene viste så lavt innhold av ett eller flere makromineral at det antagelig reduserte avlingsnivået. Ut fra mineralbehovet hos sau og storfe viste plante- og blodprøver at flere av besetningene hadde liten tilførsel av svovel, fosfor, selen og E-vitamin, mens tilførselen av magnesium, kobolt og kopper var tilfredsstillende. Videre bearbeidelse av innsamla datamateriell og utprøving av ulike selentilskudd til jord og planter vil danne grunnlaget for å trekke endelig konklusjoner i forskningsprogrammet, samt utarbeide praktiske råd om mineraltilførsel til planter og drøvtyggere i økologisk landbruk. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Dairy cattle; Sheep and goats; Feeding and growth. |
| Ano: 2003 |
URL: http://orgprints.org/6927/1/Mineral%2DSIP_til_Kvithamardagene__22.01.03_m_fig.doc |
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| Govasmark, Espen; Steen, Arvid; Bakken, Anne Kjersti; Strøm, Turid; Hansen, Sissel; Bernhoft, Aksel. |
| To evaluate the animal nutritional status of copper, molybdenum and cobalt on Norwegian organic farms, soil, herbage and animal blood samples were collected from 27 dairy and sheep farms and analysed for Cu, Mo and Co. The herbage median (10th-90th percentile) Cu, Mo, and Co concentrations (mg/kg DM) and the Cu:Mo ratio in the first cut were 5.3 (3.9-6.8), 1.5 (0.6-4.8), <0.05 (<0.05-0.08) and 3.8 (1.1-8.3) and in the second cut 7.0 (5.7-9.3), 3.3 (1.6-10.1), 0.06 (<0.05-0.15) and 2.0 (0.8-5.2), respectively. The results of mixed model analyses of herbage Cu and Mo indicated that soil pH, soil organic matter content, herbage botanical composition, yield and phenological stage of timothy at harvest mostly influenced the herbage micronutrient... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Farm nutrient management; Feeding and growth. |
| Ano: 2005 |
URL: http://orgprints.org/6921/1/CuMoCo_artikkel.pdf |
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| Govasmark, Espen; Steen, Arvid; Bakken, Anne Kjersti; Strøm, Turid; Hansen, Sissel. |
| To obtain a general picture of the herbage zinc, iron and manganese concentrations and their relation to dietary requirements of ruminants on organic farms, we analysed soil and herbage samples from four regions in Norway. The soil median Zn, Fe and Mn concentrations were 0.18, 13 and 0.84 mg/L, respectively. The herbage median (10th-90th percentile) Zn, Fe and Mn concentrations (mg/kg) in herbage in the first cut were 19 (14-34), 50 (36-88), 34 (22-86) and in the second cut 21 (16-37), 84 (52-171) and 66 (36-205), respectively. The results of mixed model analysis of herbage Zn, Fe and Mn indicate that soil pH, soil texture, soil mineral concentration and botanical composition are the most influencing factors. We conclude that Zn, Fe and Mn did not limit... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Farm nutrient management; Feeding and growth. |
| Ano: 2005 |
URL: http://orgprints.org/6110/1/ZnMnFe_artikkel.pdf |
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| Govasmark, Espen. |
| To obtain a general picture of the herbage zinc (Zn), iron (Fe), manganese (Mn), copper (Cu), molybdenum (Mo), cobalt (Co) and selenium (Se) concentrations on organic livestock farms, we analysed soil (2001) and herbage (2001 and 2002) samples from 28 farms from four regions in Norway. We analysed animal blood plasma Cu, B12 (Co), α- and γ-tocopherol (vitamin E) and whole blood Se to investigate if the farms feeding practice met the dietary need of Cu, Co, Se and vitamin E in animals. The first cut herbage median (10th-90th percentile) Zn, Fe, Mn, Cu, Mo, Co and Se concentrations were 19 (14-34), 50 (36-88), 34 (22-86), 5.3 (3.9-6.8), 1.5 (0.6-4.8), <0.05 (<0.05-0.08) and <0.01 (<0.01-0.03) mg kg-1 DM, respectively. The herbage trace... |
| Tipo: Thesis |
Palavras-chave: Crop health; Quality; Protection Nutrient turnover Pasture and forage crops Dairy cattle Farm nutrient management Sheep and goats Feeding and growth. |
| Ano: 2005 |
URL: http://orgprints.org/6923/1/PhD_thesis_Espen_Govasmark_2005_7.pdf |
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| Govasmark, Espen; Steen, Arvid; Strøm, Turid; Hansen, Sissel; Singh, Bal Ram; Bernhoft, Aksel. |
| Herbage selenium (Se) concentration is generally low in Norway. It is unknown, if feeding practises on Norwegian organic farms fulfil the dietary need of Se and vitamin E to sheep and dairy cattle. Therefore, we analysed Se in soil and herbage, and Se and vitamin E in animal blood in the indoor feeding season at 14 organic dairy and 14 organic sheep farms. The herbage Se concentration was low. Approximately 50 and 35 % of all samples in the first and second cut, respectively, had Se concentrations below the detection limit of 0.01 mg/kg dry matter (DM). The median (10th, 90th percentile) Se concentrations were <0.01 (<0.01, 0.03) and 0.02 (<0.01, 0.06) mg/kg DM in the first and second cuts, respectively. Whole blood Se concentrations were 0.10... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Sheep and goats; Feeding and growth. |
| Ano: 2005 |
URL: http://orgprints.org/6922/1/Se_og_vit_e_artikkel.pdf |
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| Hansen, Sissel; A. Bleken, Marina; Løes, Anne-Kristin; Govasmark, Espen; Falk Øgaard, Anne; Breland, Tor Arvid. |
| Diverse production on each farm, with livestock density well balanced with crop production, has been the traditional way to maintain the soil fertility in organic farming systems. However, there is a trend of specialisation into stockless arable or livestock farms. Stockless farming is challenged by depletion of soil mineral reserves and soil organic matter, risk of large nutrient losses after green manuring, and dependence on nutrient supply from external sources. In this paper, we focus on these challenges to sustained soil fertility. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Environmental aspects; "Organics" in general; Farm nutrient management. |
| Ano: 2007 |
URL: http://orgprints.org/11956/1/NJF_2007_Hansen_et._al._Sustainable_nutrient_supply_challenged.pdf |
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| Govasmark, Espen; Steen, Arvid; Bakken, Anne Kjersti; Strøm, Turid; Hansen, Sissel. |
| Det var generelt et høgere innhold av de enkelte mikromineralene i andre slått enn i første slått. Flere av planteprøvene viste så lavt innhold av sink at det kan redusere avlingsnivået. Mikromineralinnholdet i kløver var høyere enn i den samlede fraksjonen av gras, kløver og urter, slik at økt kløverinnhold i enga er viktig for å øke innholdet av mikromineraler i fôret Ut fra mineralbehovet hos sau- og storfe viste plante- og blodprøver at flere av besetningene hadde for liten tilførsel av selen og E-vitamin, mens tilførselen av kobolt og kopper stort sett var tilfredsstillende. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Nutrient turnover Dairy cattle Sheep and goats Feeding and growth. |
| Ano: 2005 |
URL: http://orgprints.org/6935/1/Espen_Govasmark_Plantem%C3%B8t_%C3%98stlandet_11_12_feb_2004.doc |
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| Novoa-Garrido, Margarita; Aanesen, Lise; Lind, Vibeke; Larsen, Hans J.S.; Govasmark, Espen; Steinshamn, Håvard. |
| In winter fed organic raised sheep inadequate plasma vitamin E levels is common and therefore supplementation is recommended. The objective of the present work was to test the supplementation of natural vitamin E and seaweed meal on the immune status of ewes and their offspring. Forty Norwegian White Sheep ewes were randomly allocated to three supplementation treatments: natural vitamin E, synthetic vitamin E, seaweed meal, and control. The feeding experiment lasted the entire indoor feeding period. Ewes and newborn lambs were vaccinated against different environmental microorganisms and pathogens. Different immunological parameters were measured. Supplementing the ewes with natural vitamin E had positive effect on immunity against Mycobacterium... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Sheep and goats; Health and welfare. |
| Ano: 2012 |
URL: http://orgprints.org/21668/1/Novoa-Garrido_et_al_2012_Immunology_sheep.pdf |
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| Adler, Steffen A.; Jensen, S.K.; Govasmark, Espen; Steinshamn, Håvard. |
| Bulk tank milk from 28 dairy farms was sampled every second month for 2 yr to assess the effects of grassland management, production system and season on milk fatty acid (FA) composition, concentrations of fat-soluble vitamins, Se, and milk sensory quality. Grassland management varied in terms of time since establishment. Short-term grassland management (SG) was defined as establishment or reseeding every fourth year or more often, and long-term grassland management (LG) was defined as less frequent establishment or reseeding. Fourteen organic (ORG) dairy farms with either short-term or long-term grassland management were paired with 14 conventional (CON) farms with respect to grassland management. Within ORG farms, SG farms differed from LG farms in... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle Pasture and forage crops Food security; Food quality and human health. |
| Ano: 2013 |
URL: http://orgprints.org/23130/1/Adler%20et%20al%202013%20Effects%20short-term%20long-term%20grassland%20management%20seasonal%20variation%20oganic%20conventional%20dairy%20farming%20composition%20bulk%20tank%20milk.pdf |
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| Registros recuperados: 10 | |
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