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.
2011
Forfattere
Svein SkøienSammendrag
Det er ikke registrert sammendrag
Forfattere
Svein SkøienSammendrag
Det er ikke registrert sammendrag
Forfattere
Alhaji JengSammendrag
An African Green Revolution cannot succeed without a secured supply of mineral fertilizers. This is particularly true of phosphorus, one of the key essential macronutrients. In most tropical soils, P is one of the main limiting plant nutrients and its deficiency is a major constraint for better crop production. This is mainly attributable to (i) the low total P content in soil, (ii) the relative unavailability of inherent soil P for plant uptake, and lastly (iii) the relative speed at which applied soluble sources of P such as inorganic P fertilizers and manures become fixed or changed to unavailable forms. It is clear that mining P minerals and spreading P fertilizers over the landscape is not sustainable in the long run. Cultural practices which can secure P sources and which conserve P should be made use of. Some of the measures necessary to adequately address the P problem can be listed as follows: nutrient cycling through the recycling of crop residues, green manures, animal manures, domestic and industrial wastes; the integration into the cropping system of Pmobilizing plant species which show the ability to improve P uptake even from less labile P forms and store P in the aboveground biomass even in excess of their needs; and biological means making use of mycorrhiza and other soil fauna to help extract fixed P from deep soils under low pH conditions.
Forfattere
Stig BorgvangSammendrag
Det er ikke registrert sammendrag
Forfattere
Kristin Lichtenfeld Mekjell MelandSammendrag
Det er ikke registrert sammendrag
Forfattere
Mekjell Meland Clive KaiserSammendrag
Det er ikke registrert sammendrag
Forfattere
Martin Vohnik Jesse j. Sadowsky Petr Kohout Zuzana Lothakova Rolf Nestby Miroslav KolarikSammendrag
Ericacea are ubiquitous calcifuges that often dominate acidic soils with poor nutrient status. Their nutrition depends on mycorrhizal fungi, which provide access to recalcitrant substrates unavailable to non-mycorrhizal plants. To date, the only experimentally proven ericoid mycorrhizal fungi belong to the Ascomycota. Ericoid mycorrhiza (ErM) with an unusual 1- to 3-layer sheat of clamped hyphae were observed in Vaccinium spp. roots in two habitats in mid-Norway. The respectiv mycobiont was isolated and examined for polygenetic position and ability to form ericoid mycorrhiza. Two conspecific clamp-and cystidia-bearing isolates formed the characteristic sheated ErM and enhanced growth of ericaceous hosts in vitro. Both failed to riably amplify with several common primer combinations (e.g.,ITS1 and ITS1F+ITS4); based on three RNA gene analyses they reside in the proximity of Trechisporales and Hymenochaetales and represent a unique lineage within Agaricomycetes.
Forfattere
Annbjørg Øverli KristoffersenSammendrag
Det er ikke registrert sammendrag
Forfattere
Geir Kjølberg KnudsenSammendrag
Det er ikke registrert sammendrag
Forfattere
Annbjørg Øverli KristoffersenSammendrag
Det er ikke registrert sammendrag