Heikki Veijalainen

Lannoitustarpeen määritys metsäojitusalueilla

Veijalainen H. Lannoitustarpeen määritys metsäojitusalueilla.

Tiivistelmä

In Finland, determination of the fertilization requirements of freshly ditched peat-lands is generally based on the ground vegetation. Ground vegetation and site type are correlated rather well with the levels of certain nutrients in the peat. The large number of peatland site types have been grouped into three fertility categories on the basis of the fertilization requirements: 1. No fertilization needed 2. PK fertilization recommended 3. NPK fertilization recommended Fertility classification may be misleading in the case of old drainage areas and growth disturbance areas, especially in the refertilization stage. In order to avoid fruitless and erroneous fertilization treatments the following suplementary methods may be used: — fertilization experiments — identifying visible deficiency symptoms — chemical foliage analysis — chemical peat analysis Needle analysis is most suitable in pine stands. In treeless areas and in spruce and birch stands other methods are more applicable at the present time.

Vastaanotettu 31.10.2017 Julkaistu 1.1.1984

Katselukerrat 1836

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