Arsenic concentrations in successive needle age classes of Norway spruce ( Picea abies [L.] Karst.)

The relationship between leaf biomass and sapwood area was investigated in a 35-year-old Norway spruce (Piceaabies (L.) Karst.) stand in mountainous conditions. Fifteen trees were destructively sampled to determine the needle biomass in several needle age-classes and whorls and the corresponding sapwood areas at the whorl branch bases and in stems at breast height. Leaf biomass/sapwood area ratio and specific leaf biomass (g•mm−2) were calculated for different needle age-classes and also for different positions in the vertical profile of the crown. The leaf biomass/sapwood area ratios were described by linear regression with a high coefficient of determination. Specific leaf biomass analysed in whorl branches was highest in the upper whorls but was decreasing downward through the profile; remained stable in the middle crown layer; and decreased again in the lower crown parts. Specific leaf biomass assessments for stems showed the largest and most increasing values in the youngest three needle age-classes followed by a decreasing trend of the specific leaf biomass in older needle age-classes. The mean values of specific leaf biomass were 1.08 g•mm−2 for branches and 1.02 g•mm−2 for stems. The results of our study are consistent with the "pipe model theory."

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Soil changes in different age classes of Norway spruce (Picea abies (L) Karst.) on afforested farmland

Nutrient Uptake and Cycling in Forest Ecosystems ◽

10.1007/978-94-011-0455-5_12 ◽

1995 ◽

pp. 103-110 ◽

Cited By ~ 1

Author(s):

A. Alriksson ◽

M. T. Olsson

Keyword(s):

Picea Abies ◽

Norway Spruce ◽

Age Classes ◽

Soil Changes

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Concentrations of nutritional and trace elements in needles of Norway spruce (Picea abies [L.] Karst.) as functions of the needle age class

Nutrient Uptake and Cycling in Forest Ecosystems ◽

10.1007/978-94-011-0455-5_35 ◽

1995 ◽

pp. 305-312

Author(s):

A. Wyttenbach ◽

P. Schleppi ◽

L. Tobler ◽

S. Bajo ◽

J. Bucher

Keyword(s):

Trace Elements ◽

Picea Abies ◽

Norway Spruce ◽

Needle Age ◽

Age Class

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Concentrations of nutritional and trace elements in needles of Norway spruce (Picea abies [L.] Karst.) as functions of the needle age class

Plant and Soil ◽

10.1007/bf00029342 ◽

1995 ◽

Vol 168-169 (1) ◽

pp. 305-312 ◽

Cited By ~ 26

Author(s):

A. Wyttenbach ◽

P. Schleppi ◽

L. Tobler ◽

S. Bajo ◽

J. Bucher

Keyword(s):

Trace Elements ◽

Picea Abies ◽

Norway Spruce ◽

Needle Age ◽

Age Class

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Allometric relationships for surface area and dry mass of young Norway spruce aboveground organs

Journal of Forest Science ◽

10.17221/2166-jfs ◽

2008 ◽

Vol 53 (No. 12) ◽

pp. 548-554 ◽

Cited By ~ 16

Author(s):

R. Pokorný ◽

I. Tomášková

Keyword(s):

Surface Area ◽

Norway Spruce ◽

Tree Height ◽

Dry Mass ◽

Tree Level ◽

Stem Volume ◽

Age Classes ◽

Sapwood Area ◽

Needle Age ◽

Leaf Mass

Tree-level allometric functions for a precise predicting of stem, branch and leaf mass and surface area of three needle-shoot age classes were estimated from measurements of crown and stem dimensions in 34 harvested Norway spruce (Picea abies [L.] Karst.) trees. Trees were grown within a 16-years-old stand in the Beskids Mountains. The results showed stem parameters (stem diameter at breast height – dbh, stem volume – Vs and stem sapwood area – SA) to be highly correlated (r > 0.98) with stem mass/area and total aboveground mass of tree. Crown parameters – volume (Cv) and surface area (Ca) were the best predictors for individual branch and needle age-classes mass (r > 0.92) or area (r > 0.85), specifically for mass and surface areas of young branches and needles. dbh most correctly predicted the branch and leaf mass/surface area of older (> 2 years) shoots. The measured parameters: dbh, SA, tree height, crown length, Ca and Cv showed a high dependence on the tree position within the stand (r > –0.81). Thus, these parameters could be modified by silviculture.

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