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
Growth, death and N dynamics of leaves, stolons and roots of harvested and unharvested white clover (cv.""Snowy"") were studied in a pot (Sturite et al., 2006) and a combined plot and root window experiment in southeast Norway (Sturite et al., 2007). Leaves of undisturbed plants contained 1.5 g N pot-1 or 6 g N m-2 in late autumn (roughly assuming 4 plants m-2). About 60% of the leaves turned over within the growing season. Thus, in an established, undisturbed white clover stand, leaf turnover would contribute 9 g N m-2 during the growing season. For stolon and root segments tagged during the first growing season, 100% and 91%, respectively, were still present in late autumn. By the end of the second growing season, the corresponding values were 77% and 46%. Thus, dead stolons and roots contributed substantially more to N deposition in the soil in the second than in the first growing season. If taking the turnover of all plant organs into account, the gross N input to the soil-plant system during the two growing seasons would amount to 63 g N m-2. This corresponded to a 2.5-fold increase over the total N in the shoots harvested during the same period.
Forfattere
Ievina SturiteSammendrag
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Sammendrag
Bele, B. Østerlie, M. & Norderhaug, A. 2010. Food production on species-rich alpine pastures. Proceedings 23rd General Meeting of the European Grassland Federation. Kiel, Germany, August 29th-September 2nd 2010.
Sammendrag
I denne studien er det undersøkt om det er forskjeller i mengde av utvalgte næringskomponenter i produkter og beitegrunnlag fra "gamle" og "moderne" kuraser. Komponenter som ble undersøkt var blant annet fettsyrer, vitaminer og antioksidanter som plante-fenoler og -pigmenter. Som referanseprodukter ble industrielt produsert (TINE) kremfløte og seterrømme brukt.
Forfattere
Bolette BeleSammendrag
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Forfattere
Jens Rohloff Inger Martinussen Eivind Uleberg Olavi Junttila Anja Hohtola Laura Jaakola Hely HäggmanSammendrag
The fruit quality of European blueberry (EB) is mainly determined by taste compounds (sugars, acids, flavour) and health-beneficial structures generally denoted as antioxidants (vitamin C, phenolic acids, flavonols, anthocyanins, proanthocyanidins). Content and compound composition is strongly affected by the growth environment regarding light, temperature, water and edaphic factors. In order to assess genotypic relationships (northern and southern clones of EB) and environmental impact (temperature, day length) on berry quality parameters, a high-throughput system for blueberry metabolite profiling of nutritional compounds was established based on gas chromatography coupled with mass spectrometry (GC/MS). Dried methanol/H2O extracts from fresh-frozen berry tissue were derivatized, and subjected to GC/MS in order to detect polar compounds such as organic acids from Krebs-cycle, amino acids, sugars, polyols, and partly secondary metabolites (phenols, flavonoids). In addition, general quality parameters such as total phenols, total anthocyanins and antioxidant capacity (FRAP) were measured. Fructose (5 g), glucose (5 g), and sucrose (0.5 g/ 100 g f.w. at average) were the most abundant carbohydrates, together with high levels of organic acids such as citric acid (1.3 g), quinic acid (1.6 g), and malic acid (0.3 g/ 100 g f.w. at average). More than 50 metabolites per sample (identified compounds and not-annotated mass spectral tags) could be detected, and established the basis for multivariate statistics using principal component analysis, hierarchical clustering, and metabolite network analysis. Genotypic differences, modulation of metabolite pools and biosynthetic relationships are being discussed in-depth.