Mika Nieminen , Antti Pätilä

Puuston kasvu ja ravinteiden saatavuus turvemaiden vanhoilla kalkituskokeilla

Nieminen M., Pätilä A. Puuston kasvu ja ravinteiden saatavuus turvemaiden vanhoilla kalkituskokeilla.

Tiivistelmä

Liming (with applications of 1 000 to 8 000 kg ha1) had no long-term (1929-1985) effect on the growth of Scots pine on drained oligotrophic peatlands. Liming plus NPK fertilization had a variable effect on the growth of the stands. The same treatment could result in a very different response in different experimental areas. Both liming alone and liming plus NPK fertilization increased the calcium, magnesium and nitrogen contents of peat and decreased the C/N ratio and acidity. Liming plus fertilization decreased needle boron and manganese and increased calcium and nitrogen concentrations. The results of peat and needle analysis indicated that the changes in nitrogen availability to trees caused by liming have not been sufficient enough to affect tree growth. It was also concluded that boron deficiency was the main reason for the lowered yield. Key words: fertilization, needle nutrients, peat nutrients, Pinus sylvestris, tree growth

Avainsanat
fertilization; tree growth; peat nutrients; Pinus sylvestris; needle nutrients

Vastaanotettu 31.10.2017 Julkaistu 1.1.1994

Katselukerrat 3183

Saatavilla http://suo.fi/article/9740 | Lataa PDF