Pentti Erjala 
,
Jussi Saramäki
Astiakoemenetelmä suotyyppien lannoitustarpeen määrityksessä.
Erjala P., Saramäki J. (1972). Astiakoemenetelmä suotyyppien lannoitustarpeen määrityksessä. Silva Fennica vol. 6 no. 1 article id 4860. https://doi.org/10.14214/sf.a14663
English title: Determination of the need for fertilizer application of drained peat soils with the pot methodAbstract
The possibilities of using a pot method to determine the need for fertilizer application were studied. Seedlings of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) H. Karst.) were grown in peat samples that had cylindrical shape with a diameter of 25 cm and height of 35 cm. The samples represented three different peatland types, and were fertilized with two levels of phosphorus, potash and nitrogen. Two transplants were planted per pot. The development of the seedlings was followed for three years.
Phosphorus seemed to be of greatest importance for the growth of the seedlings, but nitrogen was also required in the poorest peatland type. Potash did not give statistically significant results. NPK application gave the best response. The usability of the method was studied by following the development of the roots. It seemed that the diameter of the pots was too small and restricted the growth of the root systems.
The PDF includes a summary in English.
Original keywords
mänty;
suotyyppi;
turvemaat;
lannoitus;
ojitetut suot;
ravinteiden puute;
lannoitustarve
English keywords
Pinus sylvestris;
fertilization;
drained peatlands;
Scots pine;
nutrient deficiency;
peatland type;
need for fertilizers
Published in 1972
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