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
Two female and two male cultivars have previously been released as a result of clone evaluation at Bioforsk Nord Holt. Selection criteria have been number of pistils or stamens per flower, number of flowers and number of shoots per m2. Currently a new group of clones are evaluated with the aim of finding new cultivars for release. The clones are collected from different parts of Norway, as well as from England and Spitsbergen. Preliminary results from harvesting 2005, 2006, 2007 and 2008 indicate good production potential for some of the tested clones. In addition to prior selection criteria based on berry yield, the levels of total anthocyanins and total phenols have been analyzed. This includes studies on the role of female clone, male pollinator and temperature on berry quality.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. Aamlid Oiva NiemeläinenSammendrag
The plant growth regulator trinexapac-ethyl (TE) has been evaluated in five registration trials in Finland and Norway. In 2007, TE was applied monthly at rates 0.023-0.090 kg a.i. ha-1 in a creeping bentgrass green trial and 0.057-0.339 kg a.i. ha-1 in two bluegrass/fescue fairway trials. Seasonal clipping yield reductions varied from 8 to 21 % in the green trial and from 0 to 25 % in the fairway trials; reductions were usually significant at two, but not at four weeks after application. Phytotoxic effects were observed at rates ≥ 0.113 kg a.i. ha-1 in one of the fairway trials, but TE resulted in less snow mould and faster green-up in 2008 in the other fairway trial and in the green trial. In a new green trial established 2008, weekly or biweekly applications of TE at rates 0.017-0.051 kg a.i. ha-1 reduced clippings by an average of 25 % and increased ball roll distance by an average of 6 %, however, differences among sprayed plots were not significant. In conclusion, we recommend that TE be approved for use on Scandinavian golf courses. Recommeded rates and application intervals are 0.023-0.046 kg a.i. ha-1 every 1-2 weeks on greens and 0.057-0.113 kg a.i. ha-1 every 2-3 weeks on fairways. The lower rates must always be used at the first application.
Forfattere
Trygve S. AamlidSammendrag
The plant growth regulator trinexapac-ethyl (TE) has been evaluated in five registration trials in Finland and Norway. In 2007, TE was applied monthly at rates 0.023-0.090 kg a.i. ha-1 in a creeping bentgrass green trial and 0.057-0.339 kg a.i. ha-1 in two bluegrass/fescue fairway trials. Seasonal clipping yield reductions varied from 8 to 21 % in the green trial and from 0 to 25 % in the fairway trials; reductions were usually significant at two, but not at four weeks after application. Phytotoxic effects were observed at rates ≥ 0.113 kg a.i. ha-1 in one of the fairway trials, but TE resulted in less snow mould and faster green-up in 2008 in the other fairway trial and in the green trial. In a new green trial established 2008, weekly or biweekly applications of TE at rates 0.017-0.051 kg a.i. ha-1 reduced clippings by an average of 25 % and increased ball roll distance by an average of 6 %, however, differences among sprayed plots were not significant. In conclusion, we recommend that TE be approved for use on Scandinavian golf courses. Recommeded rates and application intervals are 0.023-0.046 kg a.i. ha-1 every 1-2 weeks on greens and 0.057-0.113 kg a.i. ha-1 every 2-3 weeks on fairways. The lower rates must always be used at the first application.
Forfattere
Bjørn Molteberg Trygve S. Aamlid Gudni Thorvaldsson Frank Enger Jan Tangsveen Trond Olav PettersenSammendrag
This report gives results from the sowing year 2007 and the two first green years 2008 and 2009 in a project evaluating turfgrass varieties for use on Scandinavian golf greens. The total project period is 2007-2010.
Forfattere
Lars Tørres HavstadSammendrag
Three different seed vigour tests, Accelerated ageing (AA), Germination index (GI) and Polyetylenglycol (PEG), were evaluated with regard to ranking six reference seed lots of ‘Grindstad" timothy (Phleum pretense L.) and ‘Lea" red clover (Trifolium pratense L.) according to their physiological potential for storage. The seed reference lots, which all had equally high standard germination percentages, had sustained different degrees of ageing before examination. In timothy, both the AA-test and the GI-test managed well to separate the low-vigour seed lots, having a poor storage potential, from the high-vigour seed lots with better storage longevity. The clearest separation was obtained using the GI-test, either as complete test (six out of six seed lots was significantly separated) or as a simplified test (five out of six seed lots was significantly separated). The germination index of the two tests was based on counting of germinating seeds either on a daily basis for ten days or after counting on day 3 and day 5, respectively. Also the AA-test managed to separate five out of six seed lots of timothy after optimal treatment for 56 h at 45oC. In red clover, the AA-test gave the clearest separation between seed lots. At optimal conditions for 24 h at 45oC, as many as five of the six red clover seed lots could significantly be separated from each other. The recommended seed vigour test for timothy (GI-test) and red clover (AA-test for 24 h at 45oC) has later been adopted for use in practical seed testing routines at the Norwegian National seed laboratory.
Sammendrag
Denne rapporten gir en gjennomgang av ulike forebyggende og konfliktdempende tiltak som har blitt finansiert av Fylkesmannen i Nordland i perioden 2000-2009. Det er tatt utgangspunkt i saksdokumenter hos Fylkesmannen, samt data fra erstatningsoppgjøret (Rovbase.no) og Organisert beitebruk. Prosedyrene for finansieringsordningen er også vurdert.
Forfattere
Trygve S. AamlidSammendrag
This lecture for Czech greenkeepers presents preliminary results form STERF"s irrigation project
Sammendrag
The production of hydrogen in green algae is catalyzed by FeFe- hydrogenases, which have high conversion efficiency and high oxygen sensitivity. Most green algae analyzed to date where hydrogenase genes are detected, have been shown to contain two distinct hydrogenases. However, very little is known about which functions the two different enzymes represent. There are also many unknowns within the mechanisms behind hydrogen production as to the roles hydrogenases play under different conditions, and consequently also about the potential for optimization of a hydrogen production process which could be found in this respect. The presented study focuses on the possibility for presence of more than two hydrogenases in a single green alga. A large number of degenerate primers were designed and used to produce 3"-RACE products, which in turn were used to design gene specific primers used for PCR and 5"-RACE reactions. The sequences were aligned with known algal hydrogenases to identify products which had homology to these. Products where homology was identified were then explored further. A high number of clones from each band were sequenced to identify products with similar lengths which would not show up as separate bands on a gel. Sequences found to have homology with algal hydrogenases were translated into putative amino acid sequences and analyzed further to obtain detailed information about the presence of specific amino acids with known functions in the enzyme. This information was used to evaluate the likelihood of these transcripts coding for true hydrogenases, versus hydrogenase-like or narf-like proteins. Conclusion: Evidence showing that Chlamydomonas noctigama is able to transcribe three genes which share a significant number of characteristics with other known algal FeFe-hydrogenases is presented . The three genes have been annotated hydA1, hydA2 and hydA3.
Sammendrag
Det er ikke registrert sammendrag