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.
2021
Sammendrag
Karboninnholdet i jord har gått ned i store deler av verden. Også i Norge. For landbruket er det derfor viktig med driftsmåter som øker lagringen av karbon i jordsmonn. Gras til eng og beite er et effektivt CO2-lager, men jordart og driftsmåte kan påvirke lagringsevnen.
Forfattere
Xiao Huang Gang Zhao Conrad Zorn Fulu Tao Shaoqiang Ni Wenyuan Zhang Tongbi Tu Mats HöglindSammendrag
Process-based grass models (PBGMs) are widely used for predicting grass growth under potential climate change and different management practices. However, accurate predictions using PBGMs heavily rely on field observations for data assimilation. In data-limited areas, performing robust and reliable estimates of grass growth remains a challenge. In this paper, we incorporated satellite-based MODIS data products, including leaf area index, gross primary production and evapotranspiration, as an additional supplement to field observations. Popular data assimilation methods, including Bayesian calibration and the updating method ensemble Kalman filter, were applied to assimilate satellite derived information into the BASic GRAssland model (BASGRA). A range of different combinations of data assimilating methods and data availability were tested across four grassland sites in Norway, Finland and Canada to assess the corresponding accuracy and make recommendations regarding suitable approaches to incorporate MODIS data. The results demonstrated that optimizing the model parameters that are specific for grass species and cultivar should be targeted prior to updating model state variables. The MODIS derived data products were capable of constraining model’s simulations on phenological development and biomass accumulation by parameter optimization with its performance exceeding model outputs driven by default parameters. By integrating even a small number of field measurements into the parameter calibration, the model’s predictive accuracy was further improved - especially at sites with obvious biases in the input MODIS data. Overall, this comparative study has provided flexible solutions with the potential to strengthen the capacity of PBGMs for grass growth estimation in practical applications.
Forfattere
Håvard SteinshamnSammendrag
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Sammendrag
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Redaktører
Camilla BaumannSammendrag
The year 2020 will go down in history as unusual and different — the year of the coronavirus. Naturally, it has also affected the work of NIBIO. But despite that, we have a great deal to show for in terms of specialist production and dissemination, across a wide range of areas that are important to many people in the Norwegian society. The year 2020 was also special for another reason — this was the year NIBIO celebrated its fifth birthday. Mergers take time and can be difficult, but also create space for development and essential change and NIBIO has come a long way in these five years. We carry out extensive specialist activity all over the country, and increasingly beyond Norway’s borders too. Our broad foundation, covering specialist production problems and value creation, resource and environmental issues with economics and social science included, means that we can fully back up our slogan “NIBIO — Making Sustainability Meaningful.” It is the core of our social responsibility. In other words, our aim is for our expertise to contribute to a positive society, where sustainable solutions depend on the abilities and specialist insight that allow us to balance a range of considerations. With enormous diversity and more than 1,000 projects in our portfolio, it is virtually impossible to present a full picture of NIBIO’s specialised activities. In this brochure, we therefore present just a small selection of articles which are a sample of our specialised activities in 2020. We hope these samples are enough to tempt you to want to find out more about NIBIO and all the exciting projects and specialised development that our 700 employees contribute towards.
Sammendrag
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Forfattere
Inger MartinussenSammendrag
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Sammendrag
Potato contributes highly to the global food security. It is predicted that the production of this crop will be negatively affected by future climatic changes. Application of hydroponics for table potato production can mitigate crop loss in highly vulnerable regions. A preliminary small-scale case-study was performed to test theoretical perspectives of hydroponic production of table potatoes in wood fiber by comparing different fiber types and fertigation strategies. Potatoes were also grown in the field to obtain a reference control. Hydroponic production of potato in a stand-alone wood fiber resulted in ca. 200% higher yield, when compared to standard soil cultivation. However, the quality of the tubers was slightly reduced (lower dry matter content). Productivity of table potatoes was affected by the growing medium and fertigation strategy. Production of potatoes in wood fiber is possible and, in the future, might complement the conventional production systems, or even become an important alternative in locations where in-field cultivation is not possible. Nevertheless, the effect of wood fiber properties and the applied fertigation strategy on yield potential and tuber quality should be further studied. Optimization of these factors will be a topic of a following full-scale research.
Forfattere
Anne Kjersti BakkenSammendrag
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Forfattere
Jo Jorem AarsethSammendrag
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