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
Trygve S. AamlidSammendrag
Det er ikke registrert sammendrag
Forfattere
A. Edvardsen R. Halvorsen Ann Norderhaug O. Pedersen K. RydgrenSammendrag
Edvardsen, A., Halvorsen, R., Norderhaug, A., Pedersen, O. & Rydgren, K. 2010. Habitat specificity of patches in modern agricultural landscapes. Landscape ecology 25 (7): 1071-1083
Sammendrag
Use of organic fertilizers in fish pond has been common since ancient times. Applying fertilizers stimulates the growth of phytoplankton, primary producers of the fish food chain. Artificial nitrogen and phosphorus fertilizers are nowadays the main types of nutrients supply in ponds. However, the use of mineral fertilizers is not sustainable due to the use of nonrenewable resource and the impact on the environment. Moreover, the Norwegian government has defined the national ambition that organic food production and food consumption should be more than 15% by 2020. Modern societies produce large amount of organic wastes, which could be reused. Ahead of utilizing such waste as fertilizers in aquaculture, the first step is to gain knowledge about the mineralization patterns in seawater. This knowledge is important to ensure proper supply time and proper amount of nutrients from waste for optimal production with minimal negative impact on the environment This poster will present a study about nitrogen mineralization pattern from organic materials relevant as fertilizers in sustainable aquaculture.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. AamlidSammendrag
The plant growth regulator trinexapac-ethyl (TE) has been evaluated in five registration trials in Finland and Norway. In 2007, TE was applied monthly at rates 0.023-0.090 kg a.i. ha-1 in a creeping bentgrass green trial and 0.057-0.339 kg a.i. ha-1 in two bluegrass/fescue fairway trials. Seasonal clipping yield reductions varied from 8 to 21 % in the green trial and from 0 to 25 % in the fairway trials; reductions were usually significant at two, but not at four weeks after application. Phytotoxic effects were observed at rates ≥ 0.113 kg a.i. ha-1 in one of the fairway trials, but TE resulted in less snow mould and faster green-up in 2008 in the other fairway trial and in the green trial. In a new green trial established 2008, weekly or biweekly applications of TE at rates 0.017-0.051 kg a.i. ha-1 reduced clippings by an average of 25 % and increased ball roll distance by an average of 6 %, however, differences among sprayed plots were not significant. In conclusion, we recommend that TE be approved for use on Scandinavian golf courses. Recommeded rates and application intervals are 0.023-0.046 kg a.i. ha-1 every 1-2 weeks on greens and 0.057-0.113 kg a.i. ha-1 every 2-3 weeks on fairways. The lower rates must always be used at the first application.
Sammendrag
Bele, B. Østerlie, M. & Norderhaug, A. 2010. Food production on species-rich alpine pastures. Proceedings 23rd General Meeting of the European Grassland Federation. Kiel, Germany, August 29th-September 2nd 2010.
Forfattere
Bjørn Molteberg Trygve S. AamlidSammendrag
The first joint Scandinavian variety testing for lawn (mowing height 25 mm), sport turf (mowing height 35, regular wear) and fairway (mowing height 15 mm) was carried out from 2005 to 2008 (http://www.scanturf.org/). The Nordic counties were divided into one northern (mostly continental, NZ) and one southern (mostly coastal, SZ) climatic zone with four and three test sites, respectively. Besides control varieties, 28 and 24 varieties were tested in NZ and SZ, respectively. Based on these trials the following varieties are candidates to be added to Nordic turfgrass cultivar guide for at least one climatic zone and at least one are of use (lawn, fairway and/or sport turf; control varieties are indicated in parantheses): Festuca rubra ssp. commutata: Bargreen, Greensleeves, Legende Margret, Rosetti 1 and Wagner 1 (Center) Festuca rubra ssp. trichophylla: Seabreeze (Barcrown) Festuca rubra: ssp. rubra, SZ: Celianna, Shadow II (Pernille, Frigg) Poa pratensis: Kaitos, Mozart 1 and Ravel 1 (Conni, Limousine) Lolium perenne: Vesuvius (Bargold) Agrostis capillaris: Leirin (Bardot, Nor)
Sammendrag
The liquid fertilizers (1) Calcinit (Ca NO3)2)+ Superba, (2) Arena Crystal, (3) Flex, (4) Plant Marvel, (5) Sea Power and (6) Sea Power + Superba were evaluated in two greenhouse experiments growing Agrostis stolonifera on columns filled with 30 cm USGA-spec. sand (ignition loss 1.4%, pH (H20) 5.6, CEC 2.7 meq/100 g dry soil) over 10 cm gravel. In expt. 1 the products were compared at weekly rates of 0.1 and 0.2 kg N/100m2 combined with two irrigation levels (1 x ET and 2x ET) during an 8 wk grow-in period; in expt. 2 as maintenance fertilizer to established turf at weekly rates of 0.05 and 0.1 kg N/100m2. Based on weekly determination of visual turfgrass quality and clipping yields, the ranking of fertilizers in the grow-in trial were Sea Power + Superba > Sea Power > Plant Marvel = Flex > Arena Crystal > Calcinit + Superba. Given as maintenance fertilizer, Plant Marvel and Arena Crystal gave higher visual quality and less invasion of moss than Sea Power, the other fertilizers producing results that were not significantly different. The results are discussed in relation to nitrogen form and the content of other nutrients in the various products.
Sammendrag
No significant differences in frost tolerance between velvet bentgrass and creeping bentgrass was observed when freezing occurred directly after acclimation. Acclimation under natural conditions was more effective than under controlled conditions. The quantitative and qualitative composition of nonstructural carbohydrates, particularly fructans, varied among bentgrass species, but did not correlate with frost tolerance. The accumulation of fructans may play a role in other aspects of winter hardiness. Subfreezing acclimation increased the frost tolerance of velvet bentgrass and creeping bentgrass.
Forfattere
Maria Strandberg Trygve S. Aamlid Demie Moore Coen J. Ritzema Jeremy KnoxSammendrag
WATEURF - Water And Turf - Efficiency and Use Reduction for the Future - is lead by the Scandinavian Turfgrass and Environment Research Foundation (STERF) in cooperation with Bioforsk, Aquatrols, Alterra, Wageningen University and Cranfield University. The network was initiated to bring stakeholders and researchers together around the issues of water and turf, and to define a strategic research agenda related to sustainable use of water in the maintenance of turfgrass. Managed turfgrass areas such as golf courses, sport fields and public parks are valuable social, environmental and economic resources, however, they require substantial quantities of water and often border or contain bodies of water. Consequently, managed turfgrass is increasingly scrutinized regarding consumption of, and impact on, water resources. WATEURF"s goal is to provide science based information on integrated management practices, based on existing knowledge and new research results, to reduce water consumption, protect water quality and document the effects of well managed turfgrass areas on water resources. Based on STERF´s model of bringing stakeholders and researchers together, and defining and implementing a strategic research agenda, WATEURF will develop opportunities for direct involvement by golf and other turfgrass sectors. Information generated will be used with various measures for training and education.