Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2006
Abstract
White clover (WC, Trifolium repens L.) or red clover (RC, Trifolium pratense L.) was grown in mixture with grasses. Samples of the mixtures and pure clovers were taken during three cuts, and the fatty acids (FA) compositions were determined. The clover species had no significant effect on the individual FA contents of the leys (g kg-1 dry matter (DM)), nor on the total FA content. Pure clovers had lower content of all individual FA (8.2 vs. 12.4 g kg-1 DM) than mixtures; the contents of all FA decreased with increasing percentage of clover in the mixture, but the decrease was weaker for C18:3n-3 than for the other FA. Although pure WC and RC had similar FA contents, the relative proportions (percentage of total FA content) of C16:0 and C18:3n-3 differed; RC had a higher proportion of C18:3n-3 and a lower proportion of C16:0. These results are partly in contradiction with previously reported.
Abstract
No abstract has been registered
Authors
Jihong Liu Clarke Sonja Klemsdal Erling Fløistad Sissel Haugslien Anne Kathrine Hvoslef-Eide Roar Moe dag-ragnar blystadAbstract
No abstract has been registered
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Bruce Talbot Kjell SuadicaniAbstract
No abstract has been registered
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Toril Drabløs EldhusetAbstract
No abstract has been registered
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Toril Drabløs EldhusetAbstract
No abstract has been registered
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Toril Drabløs EldhusetAbstract
No abstract has been registered
Authors
Helge Lundekvam Lillian Øygarden Trond Børresen Arnold Arnoldussen John Boardman Jean PoesenAbstract
Soil erosion in Norway Abstract Soil erosion in Norway mainly occurs in autumn and winter period. High soil losses may occur by heavy snowmelt and/or rainfall in combination with frozen and not covered soil. Dominating erosion processes are sheet and rill erosion, deeper rilling caused by concentrated surface runoff, gullying and erosion in connection with tile drains. Research on tillage systems have been ongoing since the mid- seventies and the systems have been ranked according to their relative erosion risk. Soil losses are documented both in plot, field and at catchment scale and also in the National Agricultural Environmental Monitoring Programme (JOVA). The data have been used for the development of the Norwegian erosion risk model ERONOR and in several governmental actions involving subsidies and new regulations based on soil erosion risk maps using an USLE ?equation adapted to Norwegian conditions. Subsidies are given for tillage practice with low erosion risk, catch crops, grass covered waterways, buffer zones and sedimentation ponds. Soil losses (annual mean values) have been 0.1- 4.36 t ha-1 in plot studies, 0.028 ? 5.2 t ha-1 in field scale studies and 0.1- 3.5 t ha-1 in catchment studies. Soil losses by extreme gullying have exceeded 100 t ha-1.
Authors
Jørgen Aleksander Mølmann Olavi Junttila Øystein Johnsen Jorunn Elisabeth OlsenAbstract
No abstract has been registered
Abstract
Three multiparous cannulated dairy cows were used to test the effect of including 0, 23 % and 46 % red clover (RC) on dry matter (DM) basis in timothy (T) silage on nitrogen (N) intake, utilization and excretion. The cows were offered a fixed ration; 13 kg silage and 7 kg concentrate DM. The N intake and urine N excretion increased with increasing silage clover proportion. Milk yield was higher in the clover containing silages than in the pure grass silage, probably due to higher organic matter digestibility in RC containing silages. The efficiency in converting feed N into milk N, however, was higher in cows fed the timothy silage than in cows offered grass/clover silages. The efficiency in microbial protein synthesis in the rumen and the proportion of microbial N of the total N flow to duodenum was higher on the T diet than on the RC containing diets. However, the clover diets gave a slightly higher proportion of bypass N originating from the feed. So, the total flow of N to duodenum was the same for all three diets. In conclusion, increased proportion of RC in T silage did not improve the N utilization.