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.
2010
Forfattere
Christian Linder Janet Allen Catherine Baroffio Agata Broniarek-Niemiec Victorio Brookes Jerry Cross Cathy Eckert Rudolf Faby Bruno Gobin Alberto Grassi Adrian Harris Barbara Labanowska Emilie Lascaux Carlo Malavolta Vincent Michel Slobodan Milenkovic Thilda Nilsson Paivi Parikka Klaus Paaske Jean-Jacques Pommier Daniel Prodorutti Lene Sigsgaard Arne Stensvand Christer Torneus Nina Trandem Tuomo Tuovinen Gabor VetekSammendrag
The usage of plant protection products and biocontrol agents in soft fruit production has always been an important subject for the IOBC/WPRS Working Group "Integrated Protection of Fruit Crops" Study Group "Soft Fruits". The usage of pesticides and biological control methods varies considerably between countries and it is very difficult to get a good overview on the range of products that are applied or in development in soft fruits. In order to share and facilitate the flow of information, the Study Group "Soft Fruit" initiated a survey on the availability and usage of active ingredients and biocontrol agents in the different European countries in 2007. First, the most important pests and diseases in strawberry and raspberry production were identified. Then members of the different countries listed available products on the domestic market and indicated their usage in the field. So far 15 countries have contributed to the survey. The received data are accessible on the website http://www.any3.ch/IOBC/Softpest/index.html
Sammendrag
The gas chromatography mass spectrometry (GC-MS) deconvolution reporting software (DRS) from Agilent Technologies has been evaluated for its ability as a screening tool to detect a large number ofpesticides in incurred and fortified samples extracted with acetone/dichloromethane/light petroleum(Mini-Luke method). The detection of pesticides is based on fixed retention times using retention timelocking (RTL) and full scan mass spectral comparison with a partly customer built automated massspectral deconvolution and identification system (AMDIS) database. The GC-MS was equipped with a programmable temperature vaporising (PTV) injector system which enables more sample to be injected.In a blind study of 52 real samples a total number of 158 incurred pesticides were found. In addition to the 85 pesticides found by manual interpretation of GC-NPD/ECD chromatograms, the DRS revealed 73 morepesticides (+46%). The DRS system also shows its potential to discover pesticides which are normally notsearched for (EPN in long beans from Thailand). A spiking experiment was performed to blank matricesof apple, orange and lettuce with 177 different pesticides at concentration levels 0.02 and 0.1 mg/kg. The samples were analysed on GC-MS full scan and the AMDIS match factor was used as a mass spectralquality criterion. The threshold level of the AMDIS match factor was set at 20 to eliminate most of thefalse positives. AMDIS match factors from 20 up to 69 are regarded only as indication of a positive hit andmust be followed by manual interpretation. Pesticides giving AMDIS match factors at ≥70 are regarded as identified. To simplify and decrease the large amount of data generated at each concentration level,the AMDIS match factors ≥20 was averaged (mean AMF) for each pesticide including the commodities and their replicates. Among 177 different pesticides spiked at 0.02 and 0.1 mg/kg level, the percentage of mean AMF values ≥70 were 23% and 80%, respectively. For 531 individual detections of pesticides (177pesticides×3 replicates) giving AMDIS match factor 20 in apple, orange and lettuce, the detection rates at 0.02 mg/kg were 71%, 63% and 72%, respectively. For the 0.1 mg/kg level the detection rates were 89%,85% and 89%, respectively. In real samples some manual interpretation must be performed in addition. However, screening by GC-MS/DRS is about 5-10 times faster compared to screening with GC-NPD/ECDbecause the time used for manual interpretation is much shorter and there is no need for re-injection on GC-MS for the identification of suspect peaks found on GC-NPD/ECD.
Forfattere
Heidi Solstad Reidar Elven Torbjørn Alm Inger Greve Alsos Harald Bratli Eli Fremstad Marit Mjelde Bjørn Moe Oddvar PedersenSammendrag
Det er ikke registrert sammendrag
Forfattere
Lars Tørres Havstad Trygve S. Aamlid Trond Maukon HenriksenSammendrag
The marked for cereal cover crop straw and herbage seed straw has diminished in many seed production areas due to less lifestock. Seed growers therefore want to chop and return the straw both in the sowing year and in the seed harvest years. The objectives of this research were (1) to compare decomposition rates of straw of barley and wheat cover crops and timothy (Phleum pratense L.), meadow fescue (Festuca pratensis Huds.), and red clover (Trifolium pratense L.) seed crops, (2) to study the effect on soil microbial activity of adding mineral nitrogen or fresh leaves from undersown seed crops, and (3) to evaluate the effect of straw placement / soil contact on straw decomposition rates. Microbial activity / straw decomposition rates were evaluated by regular measurement of CO2 production in four laboratory incubation experiments lasting for 150-161 days. Microbial activity was always enhanced by adding straw on the soil surface. Straw of barley resulted in higher CO2 production than straw of wheat, while straw of red clover and meadow fescue resulted in higher CO2 production than straw of timothy. Inclusion of fresh leaves of white clover and timothy increased CO2 production during the first and second half of the incubation experiments, respectively. Neither in the sowing year nor in the seed harvest year was microbial activity stimulated by adding fertilizer nitrogen, but soil mineral nitrogen by the end of the experiments was higher after adding fertilizer or fresh leaves, and lower after adding grass seed straw. Presumably due to higher humidity, straw decomposition in a field experiment was higher in timothy stubble than in wheat stubble and higher at 2 cm than at 10 cm above the soil surface. For practical seed production, growers are recommended to leave short stubble, to chop the straw as finely as possible, and to distribute the straw evenly on the surface in close contact with soil particles.
Sammendrag
Today the spruce bark beetle Ips typographus is always univoltine in Northern Europe including Norway and completes development from egg to adult between May and August. Further south in Europe, development is bivoltine with the completion of two generations in most years. A temperature-driven developmental model suggests that by 2070-2100 the voltinism of I. typographus will change dramatically in Norway. If summers become only 2.5°C warmer than today bivoltinism can be expected every single year in the major spruce growing areas in S-Norway. This is likely to have dramatic effects on forestry since two generations per year will give two, instead of one, attack periods each summer. In addition to increasing the number of attacked trees the effect of the attacks may also be more severe, as Norway spruce is more susceptible to beetle attacks later in the summer. However, climate change will probably also change the phenology of Norway spruce and thus its susceptibility to attack by I. typographus and its phytopathogenic fungal associates. We are currently modelling how tree resistance varies with temperature and tree phenology in order to provide more well-founded advice to forest managers on the interaction between bark beetles and tree in a future climate.
Sammendrag
We monitored the effects of the drought stress on 20-year old clones of Norway spruce (Picea abies) by using a range of instrumental methods. On two experimental plots (Hoxmark, Norway, 59°40\"14`N, 10°47\"36`E) the drought was induced in a period between May and October 2009 by removing the throughfall using the rain shelters and trenching. We collected data on soil moisture, stem and branch sap flow, xylem diameter, anatomical and calorimetric analysis of the needles, fine root biomass and dynamics and resistance to pathogens. Standard meteorological data were collected locally throughout the whole period. Here we present the preliminary analysis of sap flow and xylem diameter in a period 1-17 august 2009. The sap flow was measured on stems in the breast height by using the method of stem tissue heat balance (THB, EMS Brno). The values were measured once in 2 minutes and saved as the average of 10 minutes. The fluctuations in xylem diameter was monitored by using the automatic dendrometers DR26 (EMS Brno). We evaluated both diurnal and seasonal dynamics. Preliminary results show a significant difference in shape of diurnal curves of transpiration as well as different time lag among the sap flow and the potential evapo-transpiration. Also the differences in diurnal dynamics of the stem circumference suggested different xylem water potential in stressed and control trees. In the drought-stressed trees the diurnal fluctuation in stem diameter was about 4 times higher and the total stem increment one third lower, com-pared to the control trees.
Forfattere
Mari Greta Bårdsen Anne-Kristin LøesSammendrag
In October 2007, the municipality of Trondheim, Norway decided to increase the public consumption of organic food. The share of public schools and kindergartens offering organic food should be increased by 20 % within 2011, as compared to 2007. Trondheim has for several years had an ambitious aim to increase the consciousness among children and youth about environmental issues, and the project “Children‟s Green City” had been an important tool in this work. The decision made it relevant for the research project “innovative Public Organic food Procurement for Youth” (iPOPY) to use Trondheim as a research case. This report describes the background for the municipal decision about organic food, and what has been done to implement it. Several employees in the municipality and other stakeholders have been interviewed. Even if the decision puts up a quite modest goal, there are several challenges to achieve it. The point of departure (how much organic food was served by kindergartens and schools in 2007) is unknown, and hence the progress is difficult to measure. In the public purchasing agreement, the municipality has obliged its appointed wholesaler to offer organic products. The intention was that the units (e.g. schools) would get easier access to organic food, and that the demand would increase, making it possible for more local farmers to convert to organic. Purchasing agreements are an important tool, but they have to be carefully designed and developed with time. The largest challenge to achieve the organic goal in Trondheim is to motivate actors who may influence the purchase of food, and to anchor the intentions in the decision in such a large organisation as the municipality is. A committed and continuous effort is required. Education and training of staff in charge of food serving in schools and kindergartens is a fruitful strategy, which has been used successfully by Children‟s Green City for several years.
Forfattere
Torkild Bakken Eivind Oug Svein Erik Sloreid Trond Bremnes Trond Knapp Haraldsen Dag DolmenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Mensur Vegara Thor S. Larsen Hans Magnus Gjøen Roger K. Abrahamsen Ole Hofstad Lars Helge Frivold Bal Ram Singh Gunnar Klemetsdal Geir-Harald Strand dag-ragnar blystad Åsmund AsdalSammendrag
The main objectives under this programme were: - To improve organising, content and quality of academic education and research in agriculture, veterinary medicine and forestry to meet with needs for qualified people in ongoing rebuilding after wars and to reach the general European level and standards. - Create functional and sustainable networks of regional institutions and professionals to support each other and cooperate for optimal use of limited available resources in the SEE region in a difficult rebuilding situation. The main activities were: - Research and development projects in the areas of animal sciences, crop and fodder production and use of GIS-methods in forestry and agriculture. - Support to development of staff and institutions in form of study stays, study material, covering of costs for laboratory analysis etc. related to M.Sc. and Ph.D. thesis work, guest lecturing and some equipment. - Support to reorientation of academic education in agriculture, forestry and veterinary medicine: Support to regional networks, professional meetings, further development and use of the Programme web site and web-based teaching.The most important strategy in this Programme was to facilitate for institutional cooperation and network building between partners in the SEE area. Therefore a broad approach was chosen with a large number of partners (16) from all actual geographical areas in SEE - West Balkan - (Albania, Bosnia & Herzegovina, Croatia, Kosovo, Macedonia and Serbia & Montenegro) and representing most of the different ethnical groups in the region. The main intensions under the new programme is to improve the organisation, content and quality of academic education, research and support services in the faculties of agriculture, veterinary medicine and forestry in order to meet national needs in the ongoing reconstruction after the regional wars. Programme activities include activities that: Support and strengthen selected institutions in SEE/WB towards obtaining European professional levels and standards. Promote networking and scientific cooperation between the SEE/WB institutions. Promote networking and scientific cooperation between institutions in SEE/WB and in Norway.