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.
2009
Forfattere
Kirsten TørresenSammendrag
Det er ikke registrert sammendrag
Forfattere
Alena Gibalova alena gibalovaSammendrag
Artikkelen omhandler falskt såbed med eksempler fra Tyskland
Forfattere
alena gibalova Kirsty McKinnonSammendrag
Det er ikke registrert sammendrag
Forfattere
Kirsten TørresenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Med et endret klima forventes mer høstkorndyrking. Etablerte arter som kveke og åkertistel kan bli et større problem. Ugras som åkerkvein og åkerreverumpe, utbredt lenger sør i Europa, kan bli et problem også i Norge. Vi ser for oss mer høstsprøyting, og større fare for utvikling av herbicidresistens.
Sammendrag
Kløvereng i vekstskiftet øker meitemarkaktiviteten. Etter 10 år var det høyere antallog biomasse av meitemark (da. regnorm, sv. daggmask) i et økologisk kornsystem(sv. spannmålsodlingssystem) enn i to konvensjonelle. Det var ingen forskjelli meitemarkbiomasse mellom et konvensjonelt og økologisk engsystem (sv.vallodlingssystem),men det var flere meitemark i det konvensjonelle. Flest grå meitemark(Aporrectodea caliginosa) ble funnet, deretter rosa (A. rosea) og stor meitemark(Lumbricus terrestris).
Sammendrag
Mechanical strength properties are the most important feature of wood in constructions. In decaying wood strength loss can precede mass loss. Hence, both in laboratory and outdoor applications non-destructive measurement methods for early decay detection are in demand. The aim of this study was to evaluate the applicability of ultrasonic pulse propagation as a tool for decay detection in different laboratory setups. A dynamic MOE (MOEdyn) strength test device based on measurement of ultrasonic pulse propagation was used for non-destructive strength evaluation in different exposure situations for Scots pine sapwood. Two different test setups were used. In the first test MOEdyn was measured above fibre saturation. A range of different wood protection treatments were tested according to the terrestrial microcosms (TMC) test, a modified ENV 807. Three different soil types were used: forest soil dominated by white rot, Simlångsdalen test field soil dominated by brown rot and compost soil characterised by a mixture of bacteria and soft rot. Before strength testing the samples were water saturated and MOEdyn was measured above the fibre saturation point at time intervals (0, 8, 16, 24, 32 and 40 weeks) using ultrasound. Comparisons of strength loss were performed between treatments in the different soil types, and strength loss was also compared with mass loss. In the second test MOEdyn were measured below fibre saturation. Ultrasound measurements were performed on 0.5 m pine logs sampled from five trees from the same stand in central Southern Norway. Logs from two of the trees had varying amounts of discoloration due to an incipient attack by the white rot fungus Phlebiopsis gigantea during storage. Amount of visible discoloration had effect on MOEdyn values from measurements on log ends. Transversal measurement of MOEdyn was not successful. In a subsequent water uptake test, logs with discoloration absorbed substantially more water than the rest of the sample. The conclusion of this study was that the use of ultrasonic MOE is applicable as an evaluation tool in early decay detection.
Forfattere
Jørn-Frode NordbakkenSammendrag
Det er ikke registrert sammendrag
Forfattere
R. Wu W. L. Guo X. R. Wang X. L. Wang T. T. Zhuang jihong liu clarke B. LiuSammendrag
Genetic instability could be provoked as an unintended consequence of genetic engineering in plants. Here we report that the rice endogenous long terminal repeat (LTR) retrotransposon Tos17 was transpositionally activated only in transgenic calli and their regenerated plants produced by biolistic transformation in rice (Oryza sativa L.) ssp. japonica cv. Matsumae. Moreover, the transpositional activity of Tos17 was sustained after plant regeneration in the T0 generation, and produced new germinal insertions. In contrast, the element remained totally quiescent in calli and regenerated plants from tissue culture of this genotype. Nonetheless, transcriptional induction and cytosine demethylation of Tos17 were found to have occurred with no significant difference in both kinds of calli, tissue culture alone and transgenic. This suggests that callus culture is likely to have played an important role in destabilizing Tos17 in the direction towards transpositional activation, but that biolistic transformation is the direct causal factor.
Forfattere
R Wu W. L. Guo X. R. Wang X. L. Wang T. T. Zhuang jihong liu clarke B. LiuSammendrag
Genetic instability could be provoked as an unintended consequence of genetic engineering in plants. Here we report that the rice endogenous long terminal repeat (LTR) retrotransposon Tos17 was transpositionally activated only in transgenic calli and their regenerated plants produced by biolistic transformation in rice (Oryza sativa L.) ssp. japonica cv. Matsumae. Moreover, the transpositional activity of Tos17 was sustained after plant regeneration in the T0 generation, and produced new germinal insertions. In contrast, the element remained totally quiescent in calli and regenerated plants from tissue culture of this genotype. Nonetheless, transcriptional induction and cytosine demethylation of Tos17 were found to have occurred with no significant difference in both kinds of calli, tissue culture alone and transgenic. This suggests that callus culture is likely to have played an important role in destabilizing Tos17 in the direction towards transpositional activation, but that biolistic transformation is the direct causal factor.