Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2010
Sammendrag
AR18×18 is an area frame survey of land resources in Norway, methodologically linked to the Lucas survey carried out by Eurostat (Eurostat 2003). The purpose of the survey is to establish an unbiased and accurate land cover and land use statistic providing a description of the state of land resources in Norway. The survey will also provide a baseline for future reports regarding changes in land resources – a national land resource accounting system. AR18×18 is based on Lucas (Land use/cover agricultural survey), a European area frame survey carried out in the EU countries by Eurostat. The sampling units of Lucas are points located on the intersections of an 18 × 18 kilometer grid mesh throughout Europe. Each of these points is the centre of a Primary Statistical Unit (PSU) of 1500 × 600 meters. The Lucas survey is carried out on ten sample points scattered within each PSU. The Norwegian modification of Lucas is to add a land cover survey of the whole PSU following the Norwegian system for vegetation and land cover mapping at intermediate scale (1: 20,000). [...]
Sammendrag
Organic fields are often assumed to have fewer pests and more beneficials than conventionally managed fields. We monitored 12 Norwegian strawberry fields, 6 organic and 6 conventional fields, by sampling leaves twice a year in 2002 and 2003. Young folded leaflets were visually inspected for eggs and adult females of strawberry mite (Phytonemus pallidus fragariae), and mature leaves were used for extraction of mobile stages of two-spotted spider mite (Tetranychus urticae). The spider mites were examined for infection of the mite-pathogenic fungus Neozygites floridana. Predatory mites (Phytoseiidae) were recorded on both leaf types, and the females mounted and identified. We also sampled leaves from selected plants in the boundary vegetation of most fields to look for sources of T. urticae, phytoseiids and N. floridana. Soil was sampled from each field, to study the natural occurrence of entomopathogenic nematodes. All samples were taken 0-13 metres from the border vegetation. Both pest mites tended to be more abundant in conventional than in organic fields, while the number of phytoseiid mites was very low in both growing systems. Nevertheless, three phytoseiid species were recorded for the first time in Norway: Amblyseius rademacheri Dosse, Neoseiulus kodryensis (Kolodochka) and Neoseiulus reductus (Wainstein). N. floridana infection found in T. urticae females varied from 0-19%, and was higher in 2002 than in 2003. The fungus was recorded at least once in all 12 fields, and there was no consistent difference between the two growing systems. In 2002 there was a significant negative correlation between % T. urticae with N. floridana hyphal bodies found in the first sampling and the number of T. urticae present in the second sampling about 4 weeks later. Beneficial nematodes (mostly Steinernema) tended to occur in more of the organic than of the conventional soil samples. To sum up, both pests (T. urticae and P. pallidus) and one of the beneficial groups (entomopathogenic nematodes) seemed to conform to the expected difference between organic and conventional fields. There are many possible mechanisms related to the differences in pesticide and fertilization regimes that could lead to such a pattern. For the two remaining beneficials (N. floridana and Phytoseiidae) we could not find a consistent correlation between abundance and growing system.
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
It is well known that farming practices, soil type, topography and climatological conditions are important factors in nutrient loss generation from agricultural dominated catchment. Also catchment scale might play an important role in nutrient loss processes. Artificial drainage of agricultural land can lead to an increase in nutrient loss, however, its magnitude is very much influenced by the soil type and drainage system. An analysis has been carried out on measured runoff in catchment of varying size in Latvia, Estonia and Norway, the results of which were presented at the NHC
Sammendrag
It is well known that farming practices, soil type, topography and climatological conditions are important factors in nutrient loss generation from agricultural dominated catchment. Catchments having a large contribution of groundwater runoff in the total runoff, in general had lower nitrogen losses. Other studies have shown that longer residence times in the Baltic catchments partly could explain the lower nitrogen loss compared to Norwegian catchments. Also catchment scale might play an important role in nutrient loss processes. Artificial drainage of agricultural land can lead to an increase in nitrate-nitrogen runoff.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
B Grizzetti A Lo Porto L.J Barkved K.J Joy S Paranjape Johannes Deelstra F Bouraoui S ManasiSammendrag
Det er ikke registrert sammendrag
Forfattere
S Manasi K.J Joy S Paranjape Nagothu Udaya Sekhar D Campbell N Latha M.M Portela A.B de Almeida M Machado K Raju Begueria PortuguesSammendrag
Det er ikke registrert sammendrag
Forfattere
Rebekka ØvstegårdSammendrag
Dengue is the most rapidly spreading mosquito-borne viral disease in the world, with an estimated 50 million infections occurring annually. Dengue infections are a significant cause of morbidity and mortality and lead to adverse social and economic impacts in many developing tropical countries. Dengue is a matter of much concern in India, where dengue is now re-emerging as one of the most important public health problems. Currently no vaccine has been licensed. The PlantVaccine project aims to develop a plant based vaccine candidate for dengue fever. This report reviews the status of and need for a dengue vaccine, easy accessibility and affordability, and overall social and economic implications of such a vaccine development in India.
Forfattere
Rebekka ØvstegårdSammendrag
Dengue is the most rapidly spreading mosquito-borne viral disease in the world, with an estimated 50 million infections occurring annually. Dengue infections are a significant cause of morbidity and mortality and lead to adverse social and economic impacts in many developing tropical countries. Dengue is a matter of much concern in India, where dengue is now re-emerging as one of the mostimportant public health problems. Currently no vaccine has been licensed. The PlantVaccine project aims to develop a plant based vaccine candidate for dengue fever. This report reviews the status of and need for a dengue vaccine, easy accessibility and affordability, and overall social and economic implications of such a vaccine development in India.