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Publications

NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.

2022

To document

Abstract

In 2017, two multi-location apple rootstock trials were established at 16 sites in 12 European countries. The evaluations are performed by members of the EUFRIN (European Fruit Research Institute Network) Apple & Pear Variety & Rootstock Testing Working Group. Two separate trials were arranged, grouping rootstocks into dwarf and semi-dwarf rootstocks according to the expected vigour; ‘Galaval’ was used as scion cultivar. The trial of dwarf rootstocks includes ‘G.11’ and ‘G.41’ (US), ‘EM_02’, ‘EM_03’, ‘EM_04’, ‘EM_05’ and ‘EM_06’ (UK), ‘62-396-B10®‘ (Russia), ‘P 67’ (Poland), ‘PFR4’ and ‘PFR5’ (New Zealand) and ‘Cepiland-Pajam®2’ as control. The trial of semi-dwarf rootstocks includes ‘G.202’ and ‘G.935’ (US), ‘PFR1’ and ‘PFR3’ (New Zealand), ‘EM_01’ (UK) and ‘G.11’ as a control for both trials. Part of the rootstocks (from dwarf and semi-dwarf rootstock trials) was planted in replanting conditions to test their tolerance to apple replant disease. All test trees came from the same nursery, and a common standardised evaluation protocol was used. Based on preliminary results averaged across sites, dwarf rootstocks can be ranked in terms of vigour in the following order: ‘EM_04’ < ‘EM_03’, ‘EM_05’ < ‘62-396-B10®’, ‘P 67’, ‘EM_02’, ‘G.11’ < ‘G.41’, ‘Cepiland-Pajam®2’ < ‘EM_06’, ‘PFR4’ < ‘PFR5’. On average, semi-dwarf rootstocks can be ranked in terms of vigour in the following order: ‘G11’ < ‘G.935’, ‘G.202’ < ‘PFR3’, ‘EM_01’ < ‘PFR1’. The highest cumulative yield in the young orchard was registered for trees on ‘PFR5’, ‘PFR4’, ‘G.11’, ‘G.41’, ‘Cepiland-Pajam®2’ and ‘EM_02’, while the lowest production was found for trees on ‘EM_04’. In the group of semi-dwarf rootstocks, the highest yield was on ‘PFR3’, ‘G.935’ and ‘PFR1’. Rootstocks also had a significant effect on fruit weight and fruit quality parameters. Results from the young orchards revealed interactions between sites and rootstock, potentially leading to site-specific rootstock choice based on the combination of rootstock, soil conditions and climate.

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Abstract

The study was performed with apple cultivar ‘Rubin’ grafted onto dwarf ‘P60’ rootstock at the experimental orchard of the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, between 2016 and 2020. The orchard was planted in 2010. Planting distances were 1.25×3.5 m. Seven treatments of tree vigour control were established, including combinations of mechanical pruning, tree trunk incision and application of prohexadione-calcium (Pro-Ca). The strongest growth was recorded for the control treatment, where slender spindle trees were maintained manually. Significantly, the shortest shoots grew where mechanical pruning was applied. A tendency for higher yield was recorded for mechanical pruning treatments. Trunk incision and summer pruning exhibited significantly lower fruit mean weight and diameter. Multiple applications of Pro-Ca increased fruit weight. Less colored fruits were obtained for mechanical pruning treatments

Abstract

Increased interest in plant-based food in Norway is creating a demand for more locally produced raw material. In addition, the feed industry has the goal to reduce its dependency on imported protein and use more nationally produced plant proteins. In a preliminary research project funded by the Research funding for the Agriculture and the Food industry (FFL/JA) we are investigating the potential for cultivating quinoa, buckwheat, lentils, chickpea, lupin and soya in Southern Norway. While some of these crops have been grown on a very small scale, we lack knowledge about cultivation under Norwegian conditions. These six crops can be cultivated with the same equipment as cereals; thus, they represent interesting candidates to be included in a cereal rotation. Two fields were established in Agder and Innlandet in spring 2021. Two cultivars of each crop, selected for their earliness, were sowed at two different sowing dates between 24th April and 21st May. Soya was sown only once. Pesticides and herbicides were not applied in the trials. Growth stages were recorded every week. A demonstration field was sown in Vestfold with one sowing date per crop between 23rd April and 1st June. All of the crops were harvested between 25th August and 4th November in Agder. The trial in Innlandet was harvested between 15th September and 27th October. However, chickpeas and one cultivar of soya were not ripe in November and were not harvested. The field in Vestfold was harvested between 1st September and 2nd December (after swathing for the latest). Weeds and length of the growing season were the two main challenging parameters impacting yields in 2021. Quinoa was most affected by weeds while chickpeas and soya could not be harvested in all three locations. Both lentils, buckwheat and lupin showed a potential in the three regions in 2021, while soya could be a candidate in the most southern area. Similar field trials are repeated in 2022.