Height growth of seedling stands growing on peatland

Heikurainen, Leo; Ouni, Jukka

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Silva Fennica vol. 4 no. 2 article id 4817 | 1970 | Article

Leo Heikurainen , Jukka Ouni

Turvemaiden taimistojen pituuskasvusta.

Heikurainen L., Ouni J. (1970). Turvemaiden taimistojen pituuskasvusta. Silva Fennica vol. 4 no. 2 article id 4817. https://doi.org/10.14214/sf.a14606

English title: Height growth of seedling stands growing on peatland

Abstract

This paper presents the results of a contest performed on behalf of the Finnish bank Kansallis-Osake-Pankki and the Central Forestry Board Tapio on growing trees on peatlands. Over 5,000 sample plots were established on drained peatlands in various parts of Finland. The aim was to achieve a best possible growth of seedling stands on peatland. The factors influencing the growth of 85 best Scots pine (Pinus sylvestris L.) and 60 best Norway spruce (Picea abies (L.) H.Karst.) sample plots were studied.

The height growth of the seedling stands decreased towards the north. Fertilization seemed not to decrease the regional differences; rather on the contrary. On the other hand, fertilization increased height growth, but evidently so that the increase obtained was greater in the southern than in the northern parts of the country. Light fertilization (50 kg/ha of K₂O and 60 kg/ha of O₂P₅) caused a clear increase in height growth while heavy fertilization (100 g/ha of K₂O and 120 kg/ha of O₂P₅), had same effect but to much greater extent than the former. Spruce seedling stands in particular benefitted of the heavy fertilization.

Fertilization did not eliminate the original differences in the quality of the sites in question, but these could still be seen in the height growth after fertilization. The effect of drain spacing on the height growth was not very clear. In dense seedling stands (800 seedlings/ha) the height growth of the dominant seedlings was greater than that obtained in stands of lower density. Hold-overs caused a decrease in the growth of the seedling stands.

The PDF includes a summary in English.

Original keywords
kuusi; mänty; turvemaat; lannoitus; ojitetut suot; taimikot; pituuskasvu; ylispuusto

English keywords
Pinus sylvestris; Norway spruce; fertilization; Picea abies; drained peatlands; Scots pine; height growth; peatlands; seedling stands; hold-overs

Published in 1970

Available at https://doi.org/10.14214/sf.a14606 | Download PDF

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