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.
2020
Forfattere
Wendy FjellstadSammendrag
Det er ikke registrert sammendrag
Sammendrag
The aim of this work was to calculate farm specific LCAs for milk-production on 200 dairy farms in Central Norway, where 185 farmed conventional and 15 according to organic standards. We assume that there are variations in environmental emission drivers between farms and therefore also variation in indicators. We think that information can be utilized to find management improvements on individual farms. Farm specific data on inputs and production for the calendar years 2014 to 2016 were used. The LCAs were calculated for purchased products and on farm-emissions, including atmospheric deposition, biological nitrogen fixation, use of fertilizer and manure. The enteric methane emission from digestion was calculated for different animal groups. The functional unit was one kg energy- corrected milk (ECM) delivered at farm-gate. For the 200 dairy farms there were huge variations of farm characteristics, environmental per- formance and economic outcome. On average, the organic farms produced milk with a lower carbon footprint (1.2 kg CO2 eq./kg ECM) than the conventional ones (1.4 kg CO2 eq./kg ECM). The organic farms had also a lower energy intensity (3.1 MJ/kg ECM) and nitrogen intensity (5.0 kg N/kg N) than their conventional colleagues (4.1 MJ/kg ECM and 6.9 kg N/kg N respectively). The contribution margin was better on the organic farms with 6.6 NOK/kg ECM compared to the conventional with 5.9 NOK/kg ECM. The average levels of the environmental indicators were comparable but slightly higher than findings in other international studies. The current study proved that the FARMnor model allows to calculate LCAs for large number of individual farms. The results show that the environmental performance and economic outcome vary between farms. We recommend that farm specific LCA-results are used to unveil what needs to be changed for improving a farm’s environmental performance.
Forfattere
A Schmitt I Pertot V Verrastro Jakob Magid B Moeskops K Möller Spiridoula Athanasiadou C Experton Håvard Steinshamn F Leiber Veronika Maurer EK Bunemann J Herforth-Rahme Lucius TammSammendrag
Det er ikke registrert sammendrag
Sammendrag
Recent discoveries have highlighted multiple mitotically and meiotically inherited alterations in gene expression that could not be explained solely by changes in the DNA sequence but were acknowledged as epigenetic. The modern view on epigenetics considers it as an integral part of genetics. Epigenetic mechanisms are encoded by genes in the genome and contribute to an essential part of genomic diversity, significantly extending its regulatory abilities. Epigenetic mechanisms involve molecular chromatin alterations through DNA methylation and histone modifications, as well as, complex non-coding RNAs and related enzyme machinery leading to changes in gene expression and resulting in changing phenotypes. In plants, epigenetic mechanisms may occur over their lifetime and across multiple generations, and can contribute substantially to phenotypic plasticity, stress responses, disease resistance, acclimation and adaptation to habitat conditions. In this review, we summarize recent advances with regards to Norway spruce epigenomics. We first consider the large size of the spruce genome that is linked to epigenetic mechanisms and why epigenomics is vitally important for spruce. Then, we discuss the molecular machinery supporting epigenetic mechanisms in Norway spruce and putative gene models involved. We presume substantial extension of gene families of epigenetic regulators and non-coding RNAs, especially in reproductive tissues. Norway spruce was the first species among forest trees in which epigenetic memory and epigenetic mechanisms were studied. The induction of an epigenetic memory during sexual reproduction and somatic embryogenesis has been described in Norway spruce. We discuss the latest results of epigenomic variation and epigenetic memory studies in Norway spruce and define the future perspectives for epigenetic studies. However, there is still a long way to decipher how the epigenetic mechanisms are involved in maintaining the stability of the spruce epigenome, how the epigenome is set to produce the epigenetic memory phenomenon and how these may result in an increased rate of adaptation to a changing environment.
Sammendrag
Remediation using nanoparticles depends on proper documentation of safety aspects, one of which is their ecotoxicology. Ecotoxicology of nanoparticles has some special features: while traditional ecotoxicology aims at measuring possible negative effects of more or less soluble chemicals or dissolved elements, nanoecotoxicology aims at measuring the toxicity of particles, and its main focus is on effects that are unique to nano-sized particles, as compared to larger particles or solutes. One of the main challenges when testing the ecotoxicity of nanoparticles lies in maintaining stable and reproducible exposure conditions, and adapt these to selected test organisms and endpoints. Another challenge is to use test media that are relevant to the matrices to be treated. Testing of nanoparticles used for remediation, particularly red-ox-active Fe-based nanoparticles, should also make sure to exclude confounding effects of altered red-ox potential which are not nanoparticle-specific. Yet another unique aspect of nanoparticles used for remediation is considerations of ageing of nanoparticles in soil or water, leading to reduced toxicity over field-relevant time scales. This review discusses these and other aspects of how to design and interpret appropriate tests and use these in hazard descriptions for subsequent risk assessments.
Sammendrag
Perennial versus short term (<3 years) grass vegetation cover is likely to have considerable differences in root density and thus carbon (C) inputs to soil. Carbon inputs are important to maintain soil organic carbon (SOC) and may even increase it. In Norway and Scandinavia, the SOC content in soil is often higher than in other parts of Europe, due to the cold climate and high precipitation (i.e. slower turnover rates for soil organic matter) and a dominance of animal production systems with a large amount of grassland. Here we aimed to evaluate differences in SOC content, down to 60 cm depth, of a long-term grassland (without ploughing for decades) and a short-term grassland (frequently renewed by ploughing) under contrasting climate, soil and management conditions. Quantification of SOC was carried out on three long-term experimental sites on an extended latitude gradient in West and North Norway. The samples were taken from 4 depth increments (0-5, 5-20, 20-40 and 40-60 cm) in treatments that have not been ploughed for at least 43 years, and in treatments that were ploughed every third year until 2011. Preliminary results suggest that there is no significant difference in SOC storage down to 60 cm between long-term and short-term grasslands.
Sammendrag
Bei der Modellierung von Ökosystemen treffen zwei Seiten des technischen Fortschritts aufeinander, einerseits die neuen Möglichkeiten, vertreten durch die Informatik und die Verbreitung von Computern, andererseits die indirekten Wirkungen moderner Zivilisationen auf die Umwelt des Menschen und die Biosphäre. In diesem Beitrag geht es um die Möglichkeit einer Zusammenschau dieser zwei Seiten der Moderne vom Standpunkt der ökologischen Modellbildung.
Forfattere
Gillian Butler Carsten Malisch Elisabet Nadeau Anna Woodhouse Bjørn Egil Flø Tomasz Sakowski Flaviana Gottardo Giorgia Riuzzi Hannah Davis Håvard SteinshamnSammendrag
The SusCatt project investigates alternative systems to improve sustainability in European cattle production, taking different approaches in Norway, Sweden, Germany, Poland, UK and Italy – all making greater use of pasture and forage, reducing damaging or external inputs. Rather than us deciding on how we tell everybody about findings, one project task is to ask potential audiences about their sources of information – how they gain knowledge? Ideally, this will offer guidance on an effective dissemination strategy. Project messages are relevant to multiple sectors: farmers, extension workers, consumers and policy makers. Attempts were made to survey these multiple stakeholders. We collected 236 opinions and found considerable variation, not only between groups but also between the same sectors in different countries. The most popular and highest-ranking sources overall were traditional press formats of newspapers and magazines. On the other hand, accessing information from social media was very polarised; almost non-existent for German and Polish stakeholders but widely used by UK farmers (possibly skewed by the dominance of face-to-face rather than on-line data collection). Findings suggest that each message from research projects needs a customized approach in dissemination, depending on the target audience and their regular habits of sourcing information
Forfattere
Trust Kasambala Richard Meadow Bishal K. Sitaula Ole Martin EkloSammendrag
It is widely accepted that climate change will affect sugarcane production and its associated pests. The aim of this chapter is to review the impact of climate variability on factors and processes affecting environmental exposure of pesticides used in sugarcane production in Malawi. We indicate that changes in temperature and rainfall will have a dual effect on pesticide risk. Temperatures higher than 30–35 °C affect pesticide toxicity, though effects will vary with pesticide-pest combination. Rapid degradation of pesticides such as acetamiprid and atrazine is expected at temperatures above 30 °C. Higher temperature may increase the incidence and severity of pests such as red spider mites, prompting farmers to use more pesticides. On the other hand, the amount and timing of rainfall in relation to pesticide application are important determinants on the amount of pesticide residue remaining in the environment. There is a higher likelihood of pesticide transport to surface (through runoff) and percolating to groundwater at higher rainfall intensity. A higher soil water content will result in increased pesticide degradation. There is a need to determine the occurrence of pesticide residue in sugarcane cropping and aquatic systems surrounding sugarcane plantations. We highly recommend building capacity in this sector, particularly in biological control of pest species using microbial agents such as insect pathogenic fungi pathogens.
Sammendrag
Det er ikke registrert sammendrag