growing GIANT SEQUOIA- Sequoiadendron giganteum in India
Mark or Travis
mark.travis at invalid.invalid
Fri Dec 13 03:23:31 EST 2002
> With this diversity of locations, questions have been raised about the
> limitation of its native range and habitat. Apparently outside of its
> native Sierra Nevada, the giant sequoia is unable to re-seed itself
> by natural means.
This might be part of the problem.
SPECIES: Sequoiadendron giganteum
IMMEDIATE FIRE EFFECT ON PLANT :
In Sequoia and Kings Canyon National Parks, a moderate-severity
prescribed fire contributed little to the mortality of giant sequoia
that were larger than 1 foot (0.30 m) d.b.h. Additionally, there is no
evidence that previous fire scarring had any relationship to tree
mortality . Low- to moderate-severity fires scorch the bark of giant
sequoia and usually cause scarring. High-severity fires may reach the
crown and consume part or all of the canopy cover . A direct
relationship exists between the size of the basal fire scar in mature
giant sequoias and the the likelihood of damage to the top or foliage of
the trees . Reduction of supporting wood from scarring predisposes
the tree to falling, and provides an opening for fungi responsible for
root disease and heart rot .
DISCUSSION AND QUALIFICATION OF FIRE EFFECT :
Despite the general belief that giant sequoia wood is not especially
flammable, it burns hotly when splintered and dry .
PLANT RESPONSE TO FIRE :
High-severity fires will generally kill pole-size and younger trees.
Immediately following the passage of fire, seeds will drop as a reaction
to hot convectional air movement through the canopy. Seeds will
germinate on the favorable mineral seedbeds created by the fire .
Postfire seedling establishment: When high-severity fires burn in dense
stands of mature giant sequoias, as many as 40,485 seedlings per acre
(100,000/ha) may develop following heat-induced seedfall . After a
prescribed burn in Sequoia and Kings Canyon National Parks, a
high-severity burn resulted in 40,000 seedlings per acre (98,800/ha) the
first year after burning. A lower-severity burn resulted in 13,000
seedlings per acre (32,110/ha). Not a single giant sequoia seedling was
found on the unburned control plot in this study .
Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8b
Sunset Zone 5
Has 2 very small Sequoiadendron giganteum in his yard.
More information about the Ag-forst