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.
2016
Sammendrag
This study examined the P fertilization effects of 11 sewage sludges obtained from sewage treated with Al and/or Fe salts to remove P by a pot experiment with ryegrass (Lolium multiflorum) and a nutrient-deficient sand−peat mixture. Also it investigated whether fertilization effects could be predicted by chemical sludge characteristics and/or by P extraction. The mineral fertilizer equivalent (MFE) value varied significantly but was low for all sludges. MFE was best predicted by a negative correlation with ox-Al and ox-Fe in sludge, or by a positive correlation with P extracted with 2% citric acid. Ox-Al had a greater negative impact on MFE than ox-Fe, indicating that Fe salts are preferable as a coagulant when aiming to increase the plant availability of P in sludge. The results also indicate that sludge liming after chemical wastewater treatment with Al and/or Fe salts increases the P fertilization effect.
Forfattere
Bjørn Egil FløSammendrag
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Sammendrag
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Sammendrag
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Forfattere
Mehreteab TesfaiSammendrag
This report gives a comprehensive review of current knowledge on nitrous oxide (N2O) emissions from mineral soils with special reference to the Norwegian agriculture and some research results from other countries. The report starts by highlighting the importance of N2O followed by descriptions of the pathways to N2O production and factors affecting N2O emissions from agricultural soils and measurement techniques and modelling N2O emissions. This is followed by reviewing and discussing research results on the effects of soil management practices including fertilizer application, soil compaction, soil tillage, effects of soil moisture and drainage conditions, effects of soil pH, freezing-thawing effects and effects of soil drying and rewetting on N2O emissions. Furthermore, some relevant mitigation measures to reduce N2O emissions are presented. The report concludes by suggesting future research needs to measure and mitigate soil N2O emissions.
Sammendrag
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Forfattere
Åshild Kristine Andreassen Per Brandtzæg Askild Lorentz Holck Olavi Junttila Heidi Sjursen Konestabo Richard Meadow Kaare Magne Nielsen Hilde-Gunn Opsahl Sorteberg Rose VikseSammendrag
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Forfattere
Åshild Kristine Andreassen Per Brandtzæg Askild Lorentz Holck Olavi Junttila Heidi Sjursen Konestabo Richard Meadow Kaare Magne Nielsen Hilde-Gunn Opsahl Sorteberg Rose VikseSammendrag
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Forfattere
Till Seehusen Wendy Marie Waalen Bernt Hoel Anne Kjersti Uhlen Tomas Persson Einar StrandSammendrag
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Forfattere
Grete StokstadSammendrag
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