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.
2007
Authors
Christopher Saski Seung-Bum Lee Siri Fjellheim Chittibabu Guda Robert K Jansen Hong Luo Jeffrey Tomkins Odd Arne Rognli Henry Daniell jihong liu clarkeAbstract
Comparisons of complete chloroplast genome sequences of Hordeum vulgare, Sorghum bicolor and Agrostis stolonifera to six published grass chloroplast genomes reveal that gene content and order are similar but two microstructural changes have occurred. First, the expansion of the IR at the SSC/IRa boundary that duplicates a portion of the 5 end of ndhH is restricted to the three genera of the subfamily Pooideae (Agrostis, Hordeum and Triticum). Second, a 6 bp deletion in ndhK is shared by Agrostis, Hordeum, Oryza and Triticum, and this event supports the sister relationship between the subfamilies Erhartoideae and Pooideae. Repeat analysis identiWed 19- 37 direct and inverted repeats 30 bp or longer with a sequence identity of at least 90%. Seventeen of the 26 shared repeats are found in all the grass chloroplast genomes examined and are located in the same genes or intergenic spacer (IGS) regions. Examination of simple sequence repeats (SSRs) identiWed 16"21 potential polymorphic SSRs. Five IGS regions have 100% sequence identity among Zea mays, Saccharum oYcinarum and Sorghum bicolor, whereas no spacer regions were identical among Oryza sativa, Triticum aestivum, H. vulgare and A. stolonifera despite their close phylogenetic relationship. Alignment of EST sequences and DNA coding sequences identified six C"U conversions in both Sorghum bicolor and H. vulgare but only one in A. stolonifera. Phylogenetic trees based on DNA sequences of 61 protein-coding genes of 38 taxa using both maximum parsimony and likelihood methods provide moderate support for a sister relationship between the subfamilies Erhartoideae and Pooideae.
Abstract
Foreløpige resultater på effekt av plantestørrelse og herdingsforhold på frosttoleranse i kveke, åkertistel og åkerdylle ble presentert
Abstract
Foreløpige resultater på effekt av plantestørrelse og herdingsforhold på frosttoleranse i kveke, åkertistel og åkerdylle ble presentert
Abstract
Foreløping resultater på effekt av klimaendring på etterfølgende gjenvekst av kvekejordstengler, røtter av åkertistel og åkerdylle ble presentert.
Abstract
Foreløpige resultater på effekt av økning i temperatur og/eller CO2, samt skygging på etterfølgende gjenvekst ved 5-14 "C av kvekejordstengler og røtter av åkerdylle og åkertistel ble presentert.
Abstract
Dette er en gjennomgang av de viktigste resultatene fra et forskningsprosjekt om gjentatt bruk av undersådd kløver i økologisk korndyrking uten husdyrgjødsel.
Authors
Helge Sjursen Lars Olav Brandsæter Jan NetlandAbstract
Grønngjødslingseffekten, spesielt N-tilførselen, er hovedgrunnen til undersådd kløver i økologisk kornproduksjon. Effekten på ettårig ugras var ett av hovedspørsmålene i prosjektet.
Authors
Therese With Berge Henrik R. Cederkvist Are H. Aastveit Haldor FykseAbstract
Varying size of the management unit (MU, to be sprayed or not) were simulated for an envisaged implementation of image-based patch spraying based on mapped weed data. The simulations showed that the size of the MU had a great influence on the mapping errors (area above weed damage threshold, but unspared by big MU) and the spraying errors (area below threshold, but sprayed by the bigger MUs). If MU size is 10 m2, these errors would sum up to about 10%.
Abstract
The Skjønhaug constructed wetland (CW) is a free surface water (FSW) wetland polishing chemically treated municipal wastewater in southeastern Norway and consists of three ponds as well as trickling, unsaturated filters with light weight aggregates (LWA). Fluxes of nitrous oxide (N2O) and methane (CH4) have been measured during the autumn, winter and summer from all three ponds as well as from the unsaturated filters. Physicochemical parameters of the water have been measured at the same localities. The large temporal and spatial variation of N2O fluxes was found to cover a range of -0.49 to 110 mg N2O-N m-2 day-1, while the fluxes of CH4 was found to cover a range of -1.2 to 1900 mg m-2 day-1. Thus, both emission and consumption occurred. Regarding fluxes of N2O there was a significant difference between the summer, winter and autumn, with the highest emissions occurring during the autumn. The fluxes of CH4 were, on the other hand, not significantly different with regard to seasons. Both the emission of N2O and CH4 was positively influenced by the amount of total organic carbon (TOC). The measured fluxes of N2O and CH4 are in the same range as those reported from other CWs treating wastewater. There was an approximately equal contribution to the global warming potential from N2O and CH4.
Abstract
Se norsk prosjektsammendrag.