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.
2015
Forfattere
Svein SolbergSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Endre Hofstad Hansen Terje Gobakken Svein Solberg Annika Kangas Liviu Theodor Ene Ernest William Mauya Erik NæssetSammendrag
Forest inventories based on field sample surveys, supported by auxiliary remotely sensed data, have the potential to provide transparent and confident estimates of forest carbon stocks required in climate change mitigation schemes such as the REDD+ mechanism. The field plot size is of importance for the precision of carbon stock estimates, and better information of the relationship between plot size and precision can be useful in designing future inventories. Precision estimates of forest biomass estimates developed from 30 concentric field plots with sizes of 700, 900, …, 1900 m2, sampled in a Tanzanian rainforest, were assessed in a model-based inference framework. Remotely sensed data from airborne laser scanning (ALS) and interferometric synthetic aperture radio detection and ranging (InSAR) were used as auxiliary information. The findings indicate that larger field plots are relatively more efficient for inventories supported by remotely sensed ALS and InSAR data. A simulation showed that a pure field-based inventory would have to comprise 3.5–6.0 times as many observations for plot sizes of 700–1900 m2 to achieve the same precision as an inventory supported by ALS data.
Forfattere
John Marshall Bryden Karen RefsgaardSammendrag
Det er ikke registrert sammendrag
Forfattere
Danilo Pecorino Mariachiara Chiantore Sara Costa Paolo Povero Francesco Massa Luca Fanciulli Roberto Cò Marte Meland Celine Rebours Johan Johansen Lars Brunner Adam Hughes Walter Speirs Tim Atack Jim Treasure Miguel Sánchez Daryl Gunning Julie Maguire Marc Shorten Demetris Kletou Alexandros Loucaides Polina Polykarpou Dafna Israel Oded Goldan Dror AngelSammendrag
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Forfattere
Hans Estrup Andersen Gitte Blicher-Mathiesen Marianne Bechmann Arvydas Povilaitis Arvo Iital Ainis Lagzdins Katarina KyllmarSammendrag
Det er ikke registrert sammendrag
Forfattere
Bruce TalbotSammendrag
Det er ikke registrert sammendrag
Forfattere
Vibeke Vandrup Martens Michel Vorenhout Ove Bergersen Paula Utigard Sandvik Jørgen HollesenSammendrag
Det er ikke registrert sammendrag
Forfattere
Wendy Marie WaalenSammendrag
Det er ikke registrert sammendrag
Forfattere
Hugh RileySammendrag
Mineral NPK fertilizer and manure have been compared since 1922 in a ley–arable rotation. During 1982–2003, cattle manure at 20–60 Mg ha−1 year−1 yielded 10–20 % less than mineral fertilizer at 100 kg N:25 kg P:120 kg K ha−1 year−1. The higher manure rates gave large nutrient surpluses. Both manure and mineral fertilizer had increased soil organic carbon (SOC), by 11.3 and 3.4 Mg ha−1 in 1996. In order to study possible residual effects, no manure was applied in 2004–2007 and mineral fertilizer was withheld from some NPK plots. Effects on yield and nutrient uptake were evaluated in relation to plots with no nutrient supply since 1922 and plots still receiving 100 kg N, 25 kg P and 120 kg K ha−1 annually. No residual response of mineral fertilizer was found, but previous manure use gave large effects. The latter yields remained around 85 % of those obtained with mineral fertilizer. Previous use of both mineral fertilizer and manure still increased available soil nutrients and pH in 2007. Differences between treatments in SOC had by then declined slightly, to 9.7 and 2.8 Mg ha−1 for manure and mineral fertilizer respectively, relative to the unfertilized control. Manure and fertilizer applications were resumed in 2008, except at the highest previous manure rate, where mean residual responses up to 2014, relative to the unfertilized control, amounted to 55 % higher yield and increases in nutrient uptake of 47 kg N, 8 kg P and 53 kg K ha−1.