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Folkesson, Christian, 2007. Marktillstånd och borbrist på åkermark planterad med gran i Västerbottens län. SLU, Dept. of Forest Ecology and Management, Umeå. Umeå: SLU, Dept. of Forest Ecology and Management



This study was made on former agricultural areas that had been planted with spruce or pine, in the county of Västerbotten. The goal of the project was to investigate suspected deficiency of boron in these areas. Several objects have been reported for possible deficiency and some of these have the characteristic symptoms of boron-deficiency. The hypotheses are that
1) Boron deficiency is present at several of the investigated objects.
2) Planting of forest on cultivated postglacial sediments leads to a successive podzolisation with a decreasing content of organic matter in the mineral soil, due to decomposition, and a decreasing pH in the soil, even on locations that have been added lime.
To be able to confirm or reject the hypotheses a number of tests were performed. Loss of ignition to obtain organic matter content on the objects, ICP/MS-DRC was used to obtain content of boron in spruce and pine needles, pH was determined and density on the objects were determined by fixed volume cylinder sampling. 13 objects were investigated in this study and two of these were control objects where no former agriculture had occurred and no visible deficiency of boron had been observed.
Most of the objects suffered from boron deficiency and the content of soil organic matter on the objects were lower than in cultivated areas on similar soils. All objects, also those previously limed three to four decades ago, or ash fertilized as late as three to four years ago, were developing mohr layers and had top soil pH in the order of magnitude of natural spruce forest on same soil type.

Main title:Marktillstånd och borbrist på åkermark planterad med gran i Västerbottens län
Authors:Folkesson, Christian
Supervisor:Malmer, Anders
Series:Examensarbeten / SLU, Institutionen för skogens ekologi och skötsel
Volume/Sequential designation:2007:9
Year of Publication:2007
Level and depth descriptor:Other
Student's programme affiliation:1140A Master of Science in Forestry, 300.0hp
Supervising department:(S) > Dept. of Forest Ecology and Management
Keywords:bor, borbrist, borgödsling, åkermark, granplantering, Västerbotten, finkornig jord, pH, SOM (Soil organic matter), podsolering
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Subject. Use of subject categories until 2023-04-30.:?? 5054 ??
Forestry - General aspects
Deposited On:13 Nov 2017 12:52
Metadata Last Modified:13 Nov 2017 12:52

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