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| Frøseth, Randi Berland; Bakken, Anne Kjersti; Bleken, Marina Azzaroli; Riley, Hugh; Pommeresche, Reidun; Thorup-Kristensen, Kristian; Hansen, Sissel. |
| In repeatedly mown and mulched green manure leys, the mulched herbage contains substantial amounts of nitrogen (N), which may only slightly contribute to the following crops’ nutrient demand. The objective of the present work was to evaluate the effect of alternative strategies for green manure management on the yield and N recovery of a subsequent spring barley crop, and their short term effects on soil structure and earthworm populations. A field trial was run from 2008 to 2011 at four sites with contrasting soils under cold climate conditions. We compared several options for on-site herbage management and the application of anaerobically digested green manure herbage. Depending on the site, removal of green manure herbage reduced the barley grain yield... |
| Tipo: Journal paper |
Palavras-chave: Farm nutrient management. |
| Ano: 2014 |
URL: http://orgprints.org/26212/2/Fr%C3%B8seth%20et%20al%202014%20Effects%20of%20green%20manure%20herbage%20management.pdf |
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| Frøseth, Randi Berland; Bakken, Anne Kjersti; Bleken, Marina Azzaroli; Riley, Hugh; Thorup-Kristensen, Kristian; Hansen, Sissel. |
| In cereal production on stockless organic farms, green manure (GM) is commonly used to improve soil fertility. The clover-grass swards are mown frequently and the herbage is commonly mulched. The purpose of this study was to increase knowledge of the N-dynamics in such rotations, in order to suggest methods for improving N efficiency and thus organic cereal yields. The hypothesis was that spring application of biogas residue from anaerobic digestion of GM herbage increases the N uptake and yield of a subsequent barley crop, compared with repeatedly in situ mulching of the same GM herbage in the preceding season. The effect of various GM treatments on spring barley yields and nitrogen dynamics was investigated, at four sites differing in soil and climatic... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Farm nutrient management. |
| Ano: 2012 |
URL: http://orgprints.org/21128/1/Froseth_et_al_2012_Improving_N_efficiency_in_barley_through_green_manure_management_and_biogas_slurry.pdf |
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| Frøseth, Randi Berland; Hansen, Sissel; Thorup-Kristensen, Kristian; Bleken, Marina Azzaroli. |
| We evaluated the effects of various strategies for green manure management, including biogas production and using the herbage-based digestate as fertilizer, on the yield and N recovery of a subsequent spring barley crop. Of the various green manure herbage measures tested, the digestate strategy was be the most promising option with regard to reduced risk of N losses and improved N recovery by a subsequent spring barley crop. Removal of the herbage reduces the risk of N losses from the crop rotation, since such losses are highly dependent upon the N input and weather conditions. This study suggests that fundamental model changes are needed for simulating the effects of low temperatures on N mineralization from fresh plant material. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Crop husbandry. |
| Ano: 2016 |
URL: http://orgprints.org/31210/1/Fr%C3%B8seth%20et%20al.%202016.%20IMPROVING%20NITROGEN%20RECOVERY%20FROM%20GREEN%20MANURE%20ON%20CONTRASTING%20SOIL%20TYPES%20UNDER%20COLD%20CLIMATE%20CONDITIONS.%2019th%20N-Workshop.27%20-29%20June%2C%20Skara%20Sweden.%20poster.pdf |
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| Steinshamn, Håvard; Thuen, Erling; Bleken, Marina Azzaroli; Brenøe, Ulrik Tutein; Ekerholt, Georg; Yri, Cecilie. |
| Inputs of N and P, flows through the soil–plant–animal pathway and removals by products were recorded for 3 years at the organically managed prototype dairy farm ‘Frydenhaug’ in Norway to assess the transfer efficiencies of N and P within and at the farm level. Nutrient balances and efficiency (N or P in products divided by N or P in inputs) were compared to data from other studies of dairy farm systems in Europe. Plant production on the farm covered nearly all the needs by the herd. However, about 10% of the plant production was sold as cash crop and about the same amount was bought as feed. At the farm level, ‘Frydenhaug’ realized annually and on average lower surpluses and higher N or P efficiencies than found in most studies concerned. On average, N... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Pasture and forage crops; Dairy cattle; Farming Systems. |
| Ano: 2004 |
URL: http://orgprints.org/2680/1/2680.pdf |
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