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
Dissolved organic nitrogen (DON) plays an important ecological role in forest ecosystems, and its concentration is related to that of dissolved organic carbon (DOC). We investigated DON concentrations and ratios of DOC to DON in throughfall and soil waters in 16 Norway spruce and two Scots pine forest stands sampled at weekly intervals between 1996 and 2006. The stands are all included in the ICP Forests Level II monitoring program and are located throughout Norway. DON concentrations were significantly and positively related to DOC concentrations in throughfall (r (2) = 0.72, p < 0.0001) and soil water at 5, 15, and 40 cm (r (2) = 0.86, 0.32, and 0.84 and p < 0.0001, 0.04, and < 0.0001, respectively). At most sites, the annual median DOC/DON ratio in throughfall ranged from 20.3 to 55.5, which is lower than values in soil water, which ranged from 24.5 to 81.3, gradually decreasing with soil depth. DON concentrations varied seasonally in throughfall at many plots and in soil water at 5-cm depth at one plot only, with higher values in the growing season, but there was no noticeable seasonality at greater depth. The ratios of DOC/DON in soil water were significantly positively related to the C/N ratio in soil at the same depth. Above-ground litter input was the main factor having a significant, negative relationship to DOC/DON in soil water at all depths studied. This might reflect the effect of site conditions on both DOC/DON ratios and litter quantity.
Forfattere
Andreas C. Drichoutis Rudolfo M. Jr. Nayga Panagiotis LazaridisSammendrag
Det er ikke registrert sammendrag
Sammendrag
Bioforsk -Jord og Miljø og UMB (IPM ) har samarbeide med Warsaw University of LIfe Sciences, Deparment of Water engineering gjennom prosjektet :" Prediction and the reduction of diffuse pollution , solid emission and extreme flows from rural areas". Financed with grants from the EEA Financial Mechanism and the Norwegian Financial Mechanism and Resource for Science. This monograpy is a Polish version of results and recommendations from the project. The Norwegian contribution in this chapter summaraize Norwegian experiences with measures to reduce diffuse pollution from agrocultural areas. English title: Best management practice to keep good water quality of surface waters in rural areas in Norway.
Sammendrag
During the first few weeks of life, chicks of the capercaillie (Tetra urogallus) and black grouse (T. tetrix) subsist mainly on insects, of which lepidopteran and hymenopteran larvae are the main components. We studied the breeding phenology of these two species and examined how the timing of breeding was related to the temporal distribution of their larval food source. During a five-year survey, capercaillie mated and hatched consistently four to six days before black grouse. Depending on the vegetation type, the number of larvae (>= 2 mm in length) increased between five and ten times within 10 days, and hatching coincided roughly with the peaks in larval numbers. Due to body growth, however, larval abundance in terms of volume was reached later and occurred 8-9 and 13-14 days after the mean hatching dates in the two species, respectively. Slightly later development of Hymenoptera as compared with that of Lepidoptera contributed in extending the period of high larval abundances for more than one week. The timing of breeding of the two species appears, therefore, to match the temporal distribution of insect food for the fast-growing chicks as they hatch several days before the peak in larval volumes. In one year, when mating was advanced, presumably due to exceptionally warm weather before mating (yet the temporal abundance of larvae was unchanged), breeding success was higher than in years when mating occurred later.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Tor Erik Brandrud Harald Bratli Anne Sverdrup-ThygesonSammendrag
Det er ikke registrert sammendrag
Forfattere
Agnar KvalbeinSammendrag
Det er ikke nødvendig å forstå fysikk for å lage gode grøfter, men litt kunnskap kan spare oss for noen kroner. Vi bør slutte å snakke om dreneringsgrus. Grus kan fjerne overflatevann, men den drenerer ikke vann ut av jorda! Les denne artikkelen og sjekk om du har forstått hvordan lukkede grøfter virker.
Forfattere
Liv Jorunn HindSammendrag
Denne rapporten gir en vurdering av erfaringer og holdninger til driftsomstilling som et tiltak i spesielt utsatte rovviltområder. Vi har tatt utgangspunkt i en skriftlig spørreundersøkelse av informanter som jobber eller har jobbet innen sauenæringa i Lierne kommune i Nord-Trøndelag.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Agnar KvalbeinSammendrag
Fysiske lover i jorden. Spesielt om greener og greenområder Overflatedrenering Sandcaping Vakumdrenering Fairwydrenering