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.
2008
Forfattere
Rosario Mosello Tiziana Amoriello Sue Benham Nicholas Clarke John Derome Kirsti Derome Gerrit Genouw Nils Konig Arianna Orrù Gabriele Tartari Anne Thimonier Erwin Ulrich Antti-Jussi LindroosSammendrag
Det er ikke registrert sammendrag
Forfattere
Rosario Mosello Tiziana Amoriello Sue Benham Nicholas Clarke John Derome Kirsti Derome Gerrit Genouw Arianna Orrù Gabriele A. Tartari Anne Thimonier Erwin Ulrich Antti-Jussi Lindroos Nils KönigSammendrag
A Working Group on Quality Assurance/Quality Control of analyses in laboratories active in the chemical analysis of atmospheric deposition and soil water has been created within the framework of the Integrated Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (UN-ECE/ICP Forests) and the EU/Forest Focus Programme (Regulation 2152/2003). This paper is a follow up to an earlier paper dealing with the validation of chemical analyses, in which validation techniques (ion balance, comparison between measured and calculated conductivity, Na/Cl ratio and relationship between different forms of N) were tested on a set of real analysis data obtained from different laboratories. This paper focuses on the validation of chemical analysis of samples containing high dissolved organic carbon (DOC) concentrations ( 5 mg C L-1), where the ion balance criterion fails because of the presence of weak organic acids. About 6000 chemical analyses of bulk open field, throughfall and stemflow samples, which contained complete sets of all ion concentrations, conductivity and DOC, produced in 8 different laboratories, were used to calculate empirical relationships between DOC and the difference between the sum of cations and the sum of anions, with the aim to evaluate a formal charge per mg of organic C...
Forfattere
Trygve S. Aamlid Asbjørn NyholtSammendrag
Artikkelen diskuterer gressets fysilogiske reaksjoner på tørke og gir konkrete råd om vanning på golfgreener.
Sammendrag
Rapporten gir resultater fra overvåkingen av Vansjø og dens tilførselselver/-bekker i 2007. Sommeren dette året var spesielt nedbørrik, noe som har hatt betydning for forholdene i innsjøen. Rapporten gir også resultater fra undersøkelser av bunnsedimentene i sjøen, samt eksperimenter med næringsstoffbegrensning. Et nytt budsjett for næringsstoffer og sediment for nedbørfeltet er beregnet basert på data fra perioden 2005-2007.
Forfattere
Lars Tørres HavstadSammendrag
Innlegg på markdag
Forfattere
Trygve S. AamlidSammendrag
Denne artikkerlen gir først en oversikt over hvordan ulike grader av tørke virker inn på grasplantenes fotosyntese, skudd og rotvekst. Deretter diskuteres vannlagringseven i greener med ulik sammensetning av vekstmediet, og de tre vanningsstategiene "Tørkebasert vanning", "Metningsvatning" og "Underskuddsvanning" defineres. Til skutt gis konkrete råd for vanning på greener.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Arne Hermansen May Bente Brurberg Vinh Hong Le Abdelhameed Elameen Ragnhild Nærstad Björn Andersson Asko Hannukkala Ari Lehtinen Bent Nielsen Jens G. Hansen Jonathan YuenSammendrag
Variability of the Nordic Phytophthora infestans population
Forfattere
Arne HermansenSammendrag
Variability of the Nordic Phytophthora infestans populatio
Forfattere
Ingvild Wartiainen Torsten Eriksson Weiwen Zheng Ulla RasmussenSammendrag
Biological nitrogen fixation (BNF) is an important source of nitrogen input in many natural ecosystems. The rice production today depends on large amounts of chemical nitrogen fertilizer, which is an environmental hazard in rice producing areas. Better exploitation of BNF is one way to reduce the use of chemical nitrogen fertilizer in the future. In this study the active diazotrophic community was investigated in nitrogen fertilized and un-fertilized rice field soils in Fujian Province, southeast China by PCR - DGGE of nifH mRNA, and the potential community by PCR - DGGE of the nifH gene. A total of 45 sequences representing 33 different sequence types were recovered from the DGGE gels. The retrieved cDNA sequences representing the active population of diazotrophs both in fertilized and un-fertilized soils dispersed throughout the nifH clades (alpha-, beta- and gamma Proteobacteria, Firmicutes and Archaea). Thirteen of the sequence types were most closely related to Azoarcus endophytes indicating widespread associations between heterotrophic nitrogen fixing bacteria and rice (Oryza sativa). The majority of the 13 sequence types were identified from the cDNA samples, showing that the Azoarcus might be an important active nitrogen fixing diazotroph in the paddy field. None of the sequence types were closly related to cyanobacteria, nevertheless previous studies from the same area had documented the prescence of cyanobacteira in rice fields. The lack of identified cyanobacteria might be due to template discrimination in the PCR reactions, or low abundance of cyanobacteria compared to heterotrophic nitrogen fixing bacteria.