NO EN

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.

NIBIO POP → NIBIO Rapport → NIBIO Bok → Våre poenggivende vitenskapelige publikasjoner →

2020

Til dokument

Forfattere

Ming Su Brian Hardaker Gudbrand Lien Therese With Berge

Sammendrag

Det er ikke registrert sammendrag

Til dokument

Forfattere

Kjetil Hindar Lars Robert Hole Kyrre Kausrud Martin Malmstrøm Espen Rimstad Lucy Robertson Odd Terje Sandlund Eva Bonsak Thorstad Knut Vollset Hugo de Boer Katrine Eldegard Nina Johanna Järnegren Lawrence R. Kirkendall Inger Elisabeth Måren Anders Nielsen Erlend Birkeland Nilsen Eli Knispel Rueness Gaute Velle

Sammendrag

Det er ikke registrert sammendrag

Forfattere

Valborg Kvakkestad Roma Gwynn Anette Sundbye Ingeborg Klingen

Sammendrag

Det er ikke registrert sammendrag

Forfattere

Bjørn Økland

Sammendrag

Det er ikke registrert sammendrag

Forfattere

Bjørn Økland Paal Krokene

Sammendrag

Det er ikke registrert sammendrag

Til dokument

Forfattere

Mats Höglind David Cameron Tomas Persson Xiao Huang Marcel Van Oijen

Sammendrag

The main objective of this paper is to present the new model BASGRA_N, to show how it was parameterized for grass swards in Scandinavia, and to evaluate its performance in predicting above-ground biomass, crude protein, cell wall content and dry matter digestibility. The model was developed to allow simulation of: (1) the impact of N-supply on the plants and their environment, (2) the dynamics of greenhouse gas emissions from grasslands, (3) the dynamics of cell-wall content and digestibility of leaves and stems, which could not be simulated with its predecessor, the BASGRA-model. To calibrate and test the model, we used field experimental data. One dataset included observations of biomass (DM) and crude protein content (CP) under different N fertilizer regimes from five sites in central and southern Sweden. The other dataset included observations of DM, and sward components as well as CP, cell wall content (NDF) and DM digestibility as affected by harvesting regime from one site in southwestern Norway. The total number of experiments was nine, of which three were used for model testing. When BASGRA_N was run with the maximum a-posteriori (MAP) parameter vector from the Bayesian calibration for the Swedish test sites, DM and CP were both simulated to an overall Pearson correlation coefficient (Rb) of minimum 0.58, Willmott's index of agreement (d) of minimum 0.69 and normalized root mean squared error (NRMSE) of maximum 0.30. Corresponding metrics for Norwegian test sites were 0.93, 0.96 and 0.27 for DM and > 0.73, > 0.61, < 0.18 for DM digestibility, NDF and CP content, respectively. We conclude that BASGRA_N can be used to simulate yield and CP responses to N with satisfactory precision, while maintaining key features from its predecessor. The results also suggest that DM digestibility and NDF can be simulated satisfactorily, which is supported by results from a recent model comparison study. Further testing of the model is needed for a few variables for which we currently do not have enough data, notably leaching and emission of N-containing compounds. Further work will include application of the model to investigate greenhouse gas mitigation options, and evaluation against independent data for the conditions for which it will be applied.

Forfattere

Finn-Arne Haugen

Sammendrag

Det er ikke registrert sammendrag

Forfattere

Finn-Arne Haugen

Sammendrag

Det er ikke registrert sammendrag

Forfattere

Ming Su Gudbrand Lien Brian Hardaker Audun Korsæth

Sammendrag

Det er ikke registrert sammendrag

Til dokument

Forfattere

Geir Wæhler Gustavsen Atle Wehn Hegnes

Sammendrag

Det er ikke registrert sammendrag