Critical needle potassium concentrations indicated by diamine putrescine in Norway spruce growing on peat soils.

Show simple item record Kaunisto, Seppo en Sarjala, Tytti en 2009-02-18T16:08:49Z en 2009-06-17T14:12:01Z 2009-02-18T16:08:49Z en 2009-06-17T14:12:01Z 1997 en
dc.identifier.citation Silva Fennica. 1997. 31(4): 383–390. en
dc.identifier.issn 0037-5330 en
dc.description.abstract Dormant needles from 129 Norway spruce trees from the 2nd and 3rd topmost whorls were collected from spruce stands locating fairly close to each other. Tree height varied from 8 to 25 metres. Trees with and without visual potassium deficiency symptoms in needles were selected and analyzed for nitrogen, phosphorus, potassium, magnesium, boron, copper, zinc, and 3 free polyamines putrescine, spermine and spermidine. The concentrations of all the analyzed nutrients ranged from deficient to satisfactory levels. Free putrescine, spermidine and spermine concentrations in the current needles had a wide variation between the trees. Spermidine had a positive and spermine a negative correlation with potassium. Putrescine had a strong negative correlation with potassium with statistically significant increase in putrescine starting at potassium concentrations below 5.4 mg/g dry weight. The regression between putrescine and potassium changed from a linear to a non-linear form at the potassium concentration of 4.2–4.6 mg/g dry weight representing a severe K deficiency limit. The corresponding K/P ratio was 2.6–2.7. Extremely low phosphorus concentrations (P < 1.0 mg/g) lowered putrescine concentrations, but otherwise the relationships between putrescine, spermidine or spermine and potassium concentrations were unaffected by tree nutrition. At adequate potassium levels the putrescine concentrations were only slightly lower in trees taller than 20 metres than in trees of 8–16 metres height. The results show that the needle putrescine concentration can be used quite reliably for describing potassium nutrition of Norway spruce in varying nutritional and tree size conditions. en
dc.language.iso en en
dc.publisher The Finnish Society of Forest Science and The Finnish Forest Research Institute en
dc.subject Picea abies, kuusi, neulaset, kalium, ravinteet, ravinteiden puute, stressi, polyamiinit, ravinnetasapaino en
dc.subject potassium, nutrition, deficiency, free polyamines, stress, nutrient balance en
dc.title Critical needle potassium concentrations indicated by diamine putrescine in Norway spruce growing on peat soils. en
dc.type Article en
dc.identifier.laitoskoodi SMS fi
dc.creator.corporateName The Finnish Society of Forest Science en
dc.creator.corporateName Finlands Forstvetenskapliga Samfund sv
dc.creator.corporateName Suomen metsätieteellinen seura fi

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