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.
2007
Forfattere
Eva Skarbøvik Per Stålnacke Øyvind Kaste John Rune Selvik Stig Borgvang Torulv Tjomsland Tore Høgåsen Stein BeldringSammendrag
Rapporten presenterer resultatene av overvåkingsprogrammet "Elvetilførsler" eller RID, for 2006.
Sammendrag
Artikkelen viser resultater fra veksthusforsøk med ulike typer flytende gjødsel til simulerte krypkveingreener med USGA-profil. Det ble gjennomført to forsøk, ett i inngroingsfasen og ett med vedlikeholdsgjødsling av etablert green. Total nitrogentilførsel var den samme uavhengig av gjdseltype. Det nye flytende gjødselproduktet "Sea Power", basert på lakseprotein, viste lovende resultater, spesielt til green i inngroingsfasen, men må kombineres med annen gjødselkilde, for eksempel Superba" Gul, for å kompensere for et relativt høyt innhold av natrium og for å gi nok kalium og mikronæringsstoffer. Av de flytende gjødselproduktene som ble sammenlikna til etablert green, gav Plant Marvel best helhetsinntrykk og størst tilvekst. Innslaget av mose i "greenene" var mindre etter gjødsling med Arena® Crystal eller Plant Marvel enn ved gjødsling med Bio Golf eller Sea Power. CalciNit" + Superba" Gul og Flex" kom i en mellomstilling.
Forfattere
Bjørn Kløve Jens Kværner Gehør Seppo Ansala HannuSammendrag
Det er ikke registrert sammendrag
Sammendrag
Simple risk assessment tools for agricultural phosphorus (P) losses, like the P index, have been developed in the U.S.A. and in some European countries. Despite its popularity, there have been surprisingly few studies, which try to test the index close to the field scale. For Norway, the P index approach comprises the risk related to both the source of P (soil P status, amount of fertilizer and manure as well as method of application, plant P release by freezing and P balance) and the risk related to transport of P (erosion, flooding, surface runoff, contributing distance, modified connectivity, soil profile, subsurface drainage). In this paper, we have applied the Norwegian P index to farmer fields within a small agricultural catchment, the Skuterud catchment (450 ha), in southeastern Norway. The Norwegian P index was tested for two agricultural fields (0.3 to 0.4 ha) and nine subcatchments (6 to 65 ha). Total P concentrations in runoff from the eleven study areas were measured during the year from May 2001 to April 2002. Results from the testing showed that the Norwegian P index described 66% of the variation in measured relative total P concentration for fields and subcatchments included in this study. Additionally, the P index was able to detect fields and subcatchments with the highest measured P concentrations. Results also showed that the source factor contributed most to the variation between fields and hence were important for the identification of high-risk areas in Skuterud catchment. It was found that the soil P status described 66% of the variation in the source factor. Among the transport variables, it was found that both erosion risk and contributing distance had an important influence on the transport factor. Overall, the study illustrated the potential of the P index to detect areas with the highest risk of P loss.
Sammendrag
Rapporten inneholder teoretisk pensum, PDF kopier av forelesninger og feltoppgaver som gjennomgås i kurset Miljøprøvetaking som holdes i Ås 8. og 9. oktober 2007.
Sammendrag
The lecture presents Biofrosk turfgrass projects with focus on variety testing
Forfattere
Trygve S. AamlidSammendrag
Dette foredraget gir en oversikt over de viktigste resultater i forskinga på gras til grøntanelgg 2003-2007.
Sammendrag
NA
Forfattere
Barbro Ulèn Marianne Bechmann John Fölster Helen Jarvie Hubert TunneySammendrag
In the north-western European countries Norway, Sweden, United Kingdom (UK) and Ireland, variability in the forms, amounts and timing of phosphorus (P) loss from agricultural land is related to national differences in climate, soil, hydrological conditions and agricultural production. The dissolved form of P constitutes 9"93% of the total phosphorus (TP) in water, subsurface drainage can contribute 12"60% and surface erosion 40"88% of TP transfer. TP export in small agricultural streams is generally in the range 0.3"6 kg ha)1 year)1, with the highest losses in Norway and UK. All four countries are complying with the EU Water Framework Directive and developing a range of measures based on P source with transport controls over P losses. A decreasing trend in TP losses has been detected in agricultural streams following the introduction of measures to reduce erosion in Norway. Average P concentrations in Swedish streams have shown a reduction of nearly 2% per year since 1993 as a result of measures introduced in southern Sweden. However, in two large rivers in agricultural regions of Sweden, the concentrations of suspended solids (SS) and TP were shown to increase by 0.4% and 0.7% per year, respectively, over the period 1975"2004, possibly as a result of climate change. It is too early to detect trends in agricultural contributions to P in surface waters as a result of catchment-sensitive farming (CSF) in the UK and Ireland.
Forfattere
Ketil Haarstad Gro Hege LudvigsenSammendrag
Pesticides in Norwegian ground water have been monitored since 1995. Here we report data including 2004. The monitoring has focused on shallow groundwater near agricultural fields (4 locations), farm wells (22 locations) and on public water works (38 locations), 450 samples were analyzed for a total of 62 pesticide compounds and metabolites, and the result was 514 detections of single compounds. Altogether 27 pesticides and metabolites were detected; 2 insecticides, 9 fungicides and 16 herbicides. Herbicides were most frequently detected (in 79% of the samples), followed by fungicides (20%) and insecticides (1%). Pesticide concentration was generally low, although high concentrations also occurred, for example 33 "g/l of metribuzine in shallow ground water near agricultural fields, and 20 "g/l of bentazon in a farm well. Some water soluble pesticides occurred both frequently and with relatively high concentrations in shallow ground water near agricultural fields. The results show that local ground water near farms is vulnerable for contamination of pesticides and needs further monitoring. Efforts should be made to minimize contamination of wells in farming areas through education on pesticide use, monitoring and well positioning. Few pesticides were detected in ground water from water works and the concentrations were low. Monitoring of water works ended in 2002. The data show that there is a continuous need to monitor pesticides as well as selected metabolites in shallow ground water and wells near agricultural fields in Norway.