On Naval Timber and Arboriculture: With Critical Notes on Authors who have Recently Treated the Subject of PlantingMatthew, Patrick
Science
On Naval Timber and Arboriculture: With Critical Notes on Authors who have Recently Treated the Subject of Planting
Matthew, Patrick
Forests and forestry -- Great Britain
the fine tops of trees, when transplanted, entirely superseded.
We shall now attempt to weigh some of these assertions and conclusions
of Sir Henry, and to pursue these inquiries a little farther.
It is known to every forester, that trees growing in close order,
and drawn up tall, will not continue healthy on being thinned out to
very open arrangement, but will often fall victims to the change of
circumstances, even though they withstand the gale. Who, then, would
be guilty of the folly of expecting {266} they would bear exposure
and the injuries of transplanting at the same time? Sir Henry Steuart
mentions some particular facts as causes of this unsuitableness.
Perhaps it would have been as well to ascribe it to general inaptitude
and delicacy, as there are several other circumstances not easily
understood, such as vital stamina, habitude or acclimatizing, and
texture and configuration of vessels, which must have influence. We
should also think simple evaporation of the fluids of the transplanted
tree a much greater cause of its failure than the cold of this or
of any other evaporation acting to numb the sap-vessels in the stem
and branches. The absorbing mouths of the rootlets, excepting in the
case of very large balls, are generally destroyed by the operation
of removal; and the development of the leaves to a certain extent
taking place before any new process of striking of the roots, owing
to the atmosphere and branches getting sooner heated in spring than
the ground and roots, the half-developed leaves shrivel up in the
arid spring air, from the evaporation of the juices and deficiency
of root-suction; and when the air gets moist, showers fall, and the
earth becomes warm enough for the _striking_ of the roots, the vital
principle is too far spent, or the material substance too much changed,
for the {267} recommencement of organic action. We have found that
trees which had remained months out of ground, and were planted in
March, succeed better than trees removed immediately from their old
site to their new, both being planted with equal care in the same
ground at the same time. The latter acquired half developed leaves
early in April, which withered from deficiency of root-suction; and it
was only with attention that we succeeded in causing them to bud forth
anew and acquire leaves about midsummer; in several, we stimulated the
root-suction by application of heated water, covering up with litter
to retain the heat. The former were several weeks more backward in
leafing, and when the buds burst, the ground had become warm enough
for _root-striking_, and the vegetation proceeded without check. Sir
Henry will say, that the check sustained by those which leafed early,
was owing to the numbing effect of the cold spring wind, and of the
cold of evaporation on the sap-vessels of the stem; but we had caused
several of them to be wrapped round the stem with soft straw-ropes,
and this did not prevent the shrivelling of the leaves, although it
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