Within-tree variations, whole-tree values and the representative heights for the whole tree value of basic density, and contents of wood components per volume were analysed for two trees of
Eucalyptus camaldulensis and
E
. globulus respectively, grown at the seed orchard in Western Australia to do quality breeding.
Within-tree variation of
E
. camaldulensis was rather uniform as 500±40, 532 ±34 kg/
m3
, but that of
E
. globulus was large as 595 ± 69, 616 ± 79 kg/
m3
and the basic density was higher in bark side and upper part in the trunk, to be expected to have higher pulp productivity.
The whole-tree values of
E
. camaldulensis were 501, 520 kg/
m3
and those of
E
. globulus were 594, 640 kg/
m3
and the difference of the species was observed.
Representative heights for the whole-tree contents ±
5
% were 0.32.8 m on
E
. camaldulensis, and 0.8 and
2
.8 m on
E
. globulus regardless the differences in the whole-tree height and the within-tree variation when they were chosen below
3
.
3
m height for sampling an increment core.
Representative heights were also determined for contents of wood components per volume as follows ; for
E
. camaldulensis, holocellulose : 1.
3
,
2
.8 m, cellulose :
2
.
83
.
3
m, hemicellulose : 0.
82
. 8 m, lignin : 0.81.
3
,
2
.8 m, extractives :
2
.
3
m, alkali-extractives : 1.
3
m, and total-extractives :
2
.32.8 m, for
E
. globulus,
2
.8 m,
2
.32.8 m,
2
.8 m, 0.30.8 m,
2
.
83
.
3
m,
2
.
83
.
3
m and
2
.8 m in the same manner.
It is expected that whole-tree pulp properties including pulp productivity are predicted by the increment core taken from these representative heights.
抄録全体を表示