scholarly journals The concentration of Ca, Sr, Ba and Mn in successive needle age classes of Norway spruce [Picea abies (L.) Karst.]

Trees ◽  
1995 ◽  
Vol 10 (1) ◽  
Author(s):  
Armin Wyttenbach ◽  
Sixto Bajo ◽  
J�rg Bucher ◽  
Verena Furrer ◽  
Patrick Schleppi ◽  
...  
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Age Classes ◽  
Needle Age

The concentrations of Fe, Zn and Co in successive needle age classes of Norway spruce [Picea abies (L.) Karst.]

Trees ◽  
2000 ◽  
Vol 14 (4) ◽  
pp. 198-205 ◽  
Author(s):  
A. Wyttenbach ◽  
L. Tobler
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Age Classes ◽  
Needle Age

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

1996 ◽  
Vol 354 (5-6) ◽  
pp. 668-671 ◽  
Author(s):  
A. Wyttenbach ◽  
S. Bajo ◽  
L. Tobler
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Age Classes ◽  
Needle Age

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

1995 ◽  
Vol 168-169 (1) ◽  
pp. 103-110 ◽  
Author(s):  
A. Alriksson ◽  
M. T. Olsson
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Age Classes ◽  
Soil Changes

Shedding of older needle age classes does not necessarily reduce photosynthetic primary production of Norway spruce

Trees ◽  
1994 ◽  
Vol 9 (1) ◽  
Author(s):  
Wolfram Beyschlag ◽  
RonaldJ. Ryel ◽  
Christian Dietsch
Keyword(s):  
Primary Production ◽  
Norway Spruce ◽  
Age Classes ◽  
Needle Age

Relation between leaf biomass and annual ring sapwood of Norway spruce according to needle age-class

1996 ◽  
Vol 26 (10) ◽  
pp. 1822-1827 ◽  
Author(s):  
Vitezslav Dvorak ◽  
Magda Oplustilova ◽  
Dalibor Janous
Keyword(s):  
Norway Spruce ◽  
Coefficient Of Determination ◽  
Leaf Biomass ◽  
Age Classes ◽  
Sapwood Area ◽  
Needle Age ◽  
Mean Values ◽  
Pipe Model ◽  
The Mean ◽  
The Relationship

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."

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

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

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

1995 ◽  
Vol 168-169 (1) ◽  
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

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

2008 ◽  
Vol 53 (No. 12) ◽  
pp. 548-554 ◽  
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 (<I>Picea abies</I> [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 (<I>r</I> > 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 (<I>r</I> > 0.92) or area (<I>r</I> > 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 (<I>r</I> > –0.81). Thus, these parameters could be modified by silviculture.

The accumulation of the rare earth elements and of scandium in successive needle age classes of Norway spruce

1994 ◽  
Vol 41 (1-2) ◽  
pp. 13-29 ◽  
Author(s):  
Armin Wyttenbach ◽  
Patrik Schleppi ◽  
Jürg Bucher ◽  
Verena Furrer ◽  
Leonhard Tobler
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Norway Spruce ◽  
Age Classes ◽  
Needle Age ◽  
The Rare Earth
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