Heikki Veijalainen

Ojitettujen suokuusikoiden ravinnetarpeen määritys neulasanalyysillä

Veijalainen H. Ojitettujen suokuusikoiden ravinnetarpeen määritys neulasanalyysillä.

English title: Nutritional diagnosis of Norway spruce stands growing on drained peatlands using foliar analysis

Tiivistelmä

The purpose of this study was to determine critical nutrient concentration values for interpreting foliar analysis of Norway spruce stands growing on drained peatlands. During 1987–91, a total of 162 spruce needle samples from various peatland sites in Finland were taken and analysed for N, P, K, Ca, Mg, B, Cu, Fe, Mn and Zn. The mean height growth of the two preceding growing seasons was used as the growth parameter for multiple and simple regression analyses. Foliar concentrations significantly explained height growth. Simple regression analysis was used to estimate the following critical values indicating severe to moderate nutrient deficiencies for the main nutrients: N 1.15–1.30%, P 1.70–2.30 mg g-1 and K 5.40–6.60 mg g-1. Also the following tentative critical concentrations are suggested: Cu 2.0 mg kg-1, Fe 13.0 mg kg-1, Mg 0.80 mg g-1 and Zn 16.0 mg kg-1. Results for B are in accordance with previous, but unsubstantiated, critical values (6–8 mg g-1).

Avainsanat
peatland forestry; foliar analysis; Critical concentration; nutrient deficiency

Vastaanotettu 31.10.2017 Julkaistu 1.1.2001

Katselukerrat 2256

Saatavilla http://suo.fi/article/9815 | Lataa PDF