Olavi Luukkanen 
,
Pentti K. Räsänen,
Paavo Yli-Vakkuri
Neulasten väri myöhemmän kasvun ja lannoitusvaikutuksen ilmaisijana.
Luukkanen O., Räsänen P. K., Yli-Vakkuri P. (1971). Neulasten väri myöhemmän kasvun ja lannoitusvaikutuksen ilmaisijana. Silva Fennica vol. 5 no. 4 article id 4853. https://doi.org/10.14214/sf.a14655
English title: The use of needle colour in predicting growth and response to fertilizationAbstract
About 4,000 seedlings of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) H. Karst.) were planted in 1965 both on a clear-cut and sheltered area in Central Finland. In the autumn of 1966 needle colour was determined by using Muncell Color Charts which allowed a quantitative measurement of three colour dimensions (hue, value, and chroma). Terminal shoot growth was recorded for two years after colour measurements. In both species, fertilization (NPK in the spring of the year of colour measurement) as well as other site factors caused differences in all three dimensions of needle colour. A regression of shoot growth on needle colour was found in both species. In most cases colour value (darkness) and, in spruce, also chroma, predicted the subsequent growth almost as well as did these two-colour variables together.
The PDF includes a summary in English.
Original keywords
kuusi;
mänty;
kasvu;
taimet;
lannoitus;
neulaset
English keywords
Pinus sylvestris;
Norway spruce;
Picea abies;
Scots pine;
planting;
growth;
seedlings;
needle clour
Published in 1971
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