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Der Nährelementstatus in Nadeln von Sirococcus – befallenen und gesunden Fichten
Author(s) -
Anglberger H.,
Sieghardt M.,
Katzensteiner K.,
Halmschlager E.
Publication year - 2003
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1046/j.1439-0329.2003.00305.x
Subject(s) - biology , nutrient , blight , picea abies , shoot , crown (dentistry) , botany , horticulture , ecology , medicine , dentistry
Summary In this study the needle nutrient status of Sirococcus shoot blight‐diseased and healthy Norway spruces ( Picea abies ) was investigated. Element contents were determined in the current year and 3‐year‐old needles collected in December 2000 from 72 mature trees randomly distributed in the investigated stand. Half of the trees were severely affected by Sirococcus conigenus and had a reduced crown whereas the other trees were unaffected and vigorous. Compared with the uninfected trees, contents of Mg, Ca, P and Mn were significantly lower in the current year and 3‐year‐old needles of diseased trees. Furthermore, analyses of the nutrient contents of needles from severely affected trees revealed insufficient Mg and Ca supply and enhanced N/Mg and N/Ca ratios, when compared with threshold values. The results of this study suggest that imbalanced tree nutrition either has a significant impact on the expression of Sirococcus disease symptoms or fungal infection itself is affecting needle nutrient contents.