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.
1999
Forfattere
Svein Eilertsen Ivar Schjelderup Stein MathisenSammendrag
Utilization of abandoned coastal meadows in northern Norway by reindeer (Rangifer tarandus tarandus) were investigated for 25 days in spring 1996 (n=12, 40-57 kg body mass (BM)) and 24 days in 1997 (n=12, 39-61 kg BM). Grass production on grazed and ungrazed meadow was measured both years. Faecal dry matter (DM) production and ruminal in vitro DM digestibility (IVDMD) of selected plants were measured in the reindeer 15-22 days after the grazing experiment started each year. During the grazing period mean ± standard deviation (s) temperature was 8.7, s = 2.8, °C in 1996 and 11.0, s = 3.0, °C in 1997, while temperature the first week was significantly higher in 1997 (P
Forfattere
B Darvas Arild AndersenSammendrag
Andalin DC-25, NeemAzal-F and RH 5849 2 F hindret ikke voksne hunner av havrebladminerflue fra å foreta næringsstikk eller legge egg. Trigard 75 WP og Fk-dimetoat hadde derimot tilfredstillende virkning.
Sammendrag
In five-long term field trials with reduced or no-tillage the grain yield decreased and the weed infestation increased compared to autumn or spring ploughing. Both stubble treatment with glyphosate and post-emergence weed control in the crop were necessary for sufficient weed control and to keep the yield at the same level as for the ploughed plots in these systems. Weather conditions influenced weed emergence and growth of weeds and cereals during the growing season, and thereby the yield depressing effect of the weeds.
Forfattere
Leiv Mortensen Hans R GislerødSammendrag
The influence of three reative air humidities and two lighting periods on growth, vase life and leaf-water relations was studied in 14 rose cultivars.It is concluded that high air humidity and continuous lighting in general should be avoided in the production of greenhouse roses.
Forfattere
Arild AndersenSammendrag
Åkersnegl var mest tallrik ved redusert jordarbeiding (og korrelert med ugrasdekningen), særlig i direktesådd. Tripsangrepet var korrelert med kornkvaliteten. Det var mest havrebladminerflue i konvensjonelle ruter, sannsynligvis pga. frodigere kornplanter der. Det var generelt mer av nyttedyrene løpebiller og kortvinger i ruter med redusert jordarbeiding. De vanligste artene blir behandlet separat.
Forfattere
Lars Olav Brandsæter Jan NetlandSammendrag
Det er ikke registrert sammendrag
Forfattere
H.B GjærumSammendrag
Five Carex rust species, four of which Uredo spp. nov., one new for African host
Forfattere
H.B GjærumSammendrag
Twenty-eight rust taxa, one new to Yukon,some hosts new to Alaska
Sammendrag
Velkommen til Planteforsk litteraturdatabase/ Welcome to Planteforsk Literature Database Tittel/Title: Genetic variability of Phytophthora infestans in Norway and Finland as revealed by mating type and fingerprint probe RG57 Publikasjon: Publication: Mycological Research Volum (Nr): Volume (No.): 103(12) Side: Page: 1609-1615 Utgitt: Published: 1999 Forfatter(e): Author(s): Brurberg, M.B., A. Hannukkala & A. Hermansen Enhet: Research station: Planteforsk Plantevernet Nøkkelord: Keywords: Plantevern, Phytophthora infestans, tørråte, krysningstype, DNA fingerprinting Sammendrag: Abstract: Mating type and RG57 fingerprints were determined for 141 isolates of Phytophthora infestans collected from 63 different fields in all important potato growing areas in Norway and Finland. Seventy-six multilocus genotypes were identified, of which 53 were detected only once. Norwegian and Finnish isolates were similar in terms of genotypic diversity and the genetic distances between the genotypes. The large number of genotypes and the high genetic distances between the genotypes indicate that sexual reproduction is contributing significantly to the genetic variation of P. infestans in Norway and Finland. ISBN: - ISSN: - Pris: Price: - Bestilling: Ordering: - Merknad: Notes: vit44 eng61 pl1 pv21
Forfattere
Trond Henriksen T.A BrelandSammendrag
On twelve occasions during a two-year field experiment, we determined the decomposition of barley straw, ryegrass foliage, white clover foliage, potato haulm and white cabbage leaves confined in buried mesh bags that were protected against leaching. After one year, 49, 18, 8, 25 and 5 % of initial carbon (C) in the five crop residues remained, respectively. The corresponding figures for nitrogen (N) were 105, 32, 8, 36 and 11 %. The data were used to evaluate a simulation model developed during previous studies of crop residue C and N turnover under controlled temperature and moisture conditions. Description of plant residue degradability and model parameter values were taken from these studies. Rate-modifying functions were then added to take account of effects of measured soil temperature and moisture. The model gave a good overall description of crop residue degradation but slightly underestimated C release and, to a greater extent, N release during the first autumn and winter. The relatively rapid N loss in this period, suggested that low temperatures restricted microbial N immobilization more than it did gross decomposition. We hypothesized that this was caused by a reduced microbial growth yield efficiency (E) at low temperatures. When we reduced the value of E from 0.5 (default value) to 0.2 at 2 °C and below, model fit to C and N mineralization was improved substantially. Moreover, the model produced an excellent fit to remaining wheat straw C and a gave good description of N mineralization in an independent experiment, indicating that reducing the value of E was justified. The results suggested that crop residue degradability and the decomposer community were reasonably described in the model, that the rate-modifying functions of temperature, moisture and N availability were sound and that parameter values set under controlled conditions represented field conditions also, possibly except that of E.