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| Registros recuperados: 68 | |
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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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| 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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| 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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| Hansen, Sissel; Bakke, Haavik, Torleiv; Bergslid, Ildri (Rose) Kristine; Elvatun, Helena; van Gool, Bart; Lunnan, Tor; Røthe, Gunnhild; Walland, Finn. |
| I denne rapporten presenterer vi seks gårder som viser at det er mulig å forene god økonomi med en miljømessig bærekraftig produksjon, men økonomien var best på de største gårdene. Felles for alle gårdene er næringsrik jord med god jordstruktur og god drenering, fokus på agronomi og godt husdyrstell. Dette resulterte i gode avlinger, god utnytting av tilførte næringsstoff, moderat bruk av energi og moderate utslipp av klimagasser. Fra observasjoner på disse gårdene og diskusjon på arbeidsseminar med gårdbrukerne, prosjektgruppe og inviterte gjester kan vi tipse om noen tiltak for miljøvennlig melkeproduksjon: god drenering, lite kjøring på våt jord, utføre jordarbeiding, gjødsling og høsting straks været og jorda er egnet, slepeslange med stripespreder i... |
| Tipo: Report |
Palavras-chave: Production systems; Dairy cattle; Farming Systems; Animal husbandry; Air and water emissions; Farm nutrient management. |
| Ano: 2018 |
URL: http://orgprints.org/33980/1/NIBIO_RAPPORT_2018_4_96.pdf |
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| Hansen, Sissel; Bakken, Anne Kjersti. |
| The content of sulphur (S) in grassland on 27 Norwegian organic farms with dairy or sheep production was investigated in 2001 and 2002. The forage content of S was below the norms (2 g S kg DM-1) for both plants and animals in a large proportion of the samples. The average S content in forage at dairy farms was 1.4 g S kg DM-1 and at sheep farms 1.5 g. Even on grasslands with low plant S content (<1 g S kg DM-1), S-fertilization did not increase yields and increased the plants’ S content only very slightly. No indications of S deficiency were observed on the dairy farms. For one sheep farm with a forage S content of 1.1 ± 0.1g S kg DM-1, brittle and short winter wool was reported. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Pasture and forage crops; Feeding and growth. |
| Ano: 2008 |
URL: http://orgprints.org/11946/1/11946.pdf |
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| Registros recuperados: 68 | |
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