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
Forfattere
Annbjørg KristoffersenSammendrag
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Sammendrag
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Sammendrag
Self-sufficiency with feed (SSF) is a basic principle in organic animal production. The current regulations do not impose strict requirements for SSF at farm level, but further restrictions are expected in future. The aim of the present work was to quantify SSF on a range of organic dairy farms in Norway and study farmers’ strategies to produce milk with a high degree of SSF. Nine farms were selected for interview and data collection. On farm level, the proportion of SSF varied between 66 and 99 %. SSF increased to 88-100 % when expressed on national level. Land area is among the limiting factors for famers to reach higher SSF while maintaining the milk production level. A lower proportion of concentrates in the diet seems to have as strong impact on SSF as using own cereals and protein crops as feed, but milk production per total feed production area was highest for the latter. The farmers’ goals and actions are important driving forces to develop more SSF in dairy production systems.
Forfattere
Simo Maduna Jon Aars Ida Marie Luna Fløystad Cornelya Klutsch Eve Marie Louise Zeyl Fiskebeck Øystein Wiig Dorothee Ehrich Magnus Andersen Lutz Bachmann Andrew E. Derocher Tommi Nyman Hans Geir Eiken Snorre HagenSammendrag
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Forfattere
Eva BrodSammendrag
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Forfattere
Tania Gomes Agathe Bour Claire Coutris Ana Catarina Almeida Inger Lise Nerland Bråte Raoul Wolf Michael Bank Amy LusherSammendrag
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Forfattere
Philippe Jeanneret Gisela Lüscher Manuel K. Schneider Philippe Pointereau Michaela Arndorfer Debra Bailey Katalin Balázs András Báldi Jean-Philippe Choisis Peter Dennis Mario Díaz Sebastian Eiter Zoltán Elek Wendy Fjellstad Thomas Frank Jürgen Kurt Friedel Ilse R. Geijzendorffer Pippa Gillingham Tiziano Gomiero Gergely Jerkovich Rob H. G. Jongman Max Kainz Anikó Kovács-Hostyánszki Gerardo Moreno Juri Nascimbene Marie-Louise Oschatz Maurizio Guido Paoletti Jean-Pierre Sarthou Norman Siebrecht Daniele Sommaggio Sebastian Wolfrum Felix HerzogSammendrag
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Sammendrag
Plant-parasitic nematodes (PPN) cause significant yield reduction in commercial pineapple (Ananas comosus) worldwide. In Kenya, few nematode studies have been conducted, although the main commercial pineapple producer has sole dispensation to use Telone II (1,3-Dichloropropene) indicating the magnitude of the nematode problem. This study was conducted with the aim to investigate the population densities and diversity of nematodes in two commercial plantations with two contrasting management practices. We additionally assessed the influence of crop age and compared this with nearby smallholder pineapple production systems. Soil and root samples were collected from fields of different ages in each commercial plantation and from 29 smallholder fields. A total of 18 genera were associated with pineapple, with a relatively greater diversity found in smallholder than commercial farms. The most prevalent genus was Meloidogyne spp. (M. javanica) followed by Helicotylenchus spp., Tylenchus spp. and Aphelenchoides spp. PPN densities were higher in relatively older fields of 24 and 36 months than from fallow and 3-month-old fields. Regression analysis additionally demonstrated the rise of PPN densities with age of pineapple fields, especially Meloidogyne spp., while free-living nematode densities declined. This study provides an indication of the high level of PPN infection in pineapple in Kenya, which would constitute an important factor contributing to low yields. The study confirms an obvious need for pineapple producers to control PPN to improve crop yields.
Sammendrag
For a 100% organic value chain, we need more varieties suitable for organic cultivation. Varieties bred for organic growing is a challenge in small markets. Many breeding goals are equal for organic and conventional cereals. Hence, accessions failing qualification as commercial varieties may perform well in organic growing. A field experiment over two years was performed at two growing sites to compare 25 accessions of spring wheat, ranging from old heritage varieties to modern breeding lines. We assessed yield and agronomic characteristics, artisan bread baking quality and sensory characteristics. Modern accessions gave best yields. Old varieties had smaller kernels, less grain filling, lower falling numbers and SDS-sedimentation volumes, but higher concentrations of minerals, although the growing site has a strong effect. Bread from modern accessions performed best in a baking test. Several sensory characteristics such as juiciness, chew resistance, firmness, acid taste and vinegar odor varied between varieties. Heritage varieties have an important cultural value, and many consumers are willing to pay a significant premium price for such products. A premium price is required, since yield levels are often considerably lower.
Sammendrag
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