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Many people believe a new sapling must be planted
to replace every tree that is harvested. This is simply not
true. In Québec, more than 80% of the forests regenerate
naturally. After logging, the young shoots that were protected
during logging are able to grow and develop quickly because
they have more room and good exposure to sunlight. However,
regeneration may be more difficult on certain sites due to poor
soil quality or the tree species concerned. In such cases nature
needs a helping hand, in the form of reforestation. |
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If very young trees
are protected during logging, the forest will be able to regenerate
naturally.
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Reforestation consists in planting new trees in
areas disturbed by insect infestations, forest fires or logging
operations, to reconstitute a forest.
Before Reforestation: Choosing the Right Species
The cones and fruit of more than thirty softwood and hardwood
species are collected in the forests of Québec, from
natural trees that are free of insects and disease and in excellent
physical condition. The Department also maintains a certain
number of sites specifically for the collection of cones and
fruit. The cones and fruit are sent to the Centre de semences
forestières de Berthier for processing, and the seeds
that are extracted are distributed to nurseries throughout Québec
for the production of saplings. Generally speaking, the seeds
are either returned to their region of origin or used in the
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ecological region for reforestation purposes. Depending
on the species and cultivation method, it takes between one and
four years to produce seedlings suitable for reforestation in the
public forests.
The Planting Process
- Site Preparation
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In many cases the site must be prepared before planting
can take place. Scarification is the most common site preparation
method. In scarification, a scarifier is used to mix the
mineral soil and logging waste with organic matter to produce
a richer soil. Because discarded branches and other waste
materials are removed, planting is much easier and the growth
of competing vegetation is delayed. |
- Reforestation
Reforestation is the term used to refer to the process of
planting young seedlings. A spade is used to dig a hole,
and a seedling is placed in the hole. The seedlings are
carried in bags attached to the planter’s belt. They
are usually planted two metres apart, although the distance
may vary for certain species. |
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The seedlings used for reforestation can be divided into two
groups, depending on whether they were produced by means of a
bare-root or container-based cultivation method.
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In the bare-root method, the seedlings are grown directly
in the ground. When they are removed from the cultivation
site, most of the root zone (the soil surrounding the roots,
which contains a host of micro-organisms) remains intact.
The seedlings therefore recover quickly when planted, since
they are able to establish contact with the new soil to
obtain the water and nutrients they need to develop.
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| In recent years, however, container cultivation methods
have gained in popularity for a number of reasons, including
high survival rates, ease of planting, higher productivity,
short nursery cultivation times (two years instead of four
years for the bare-root process), and an extended reforestation
period (up to the end of summer). |
Large seedlings are used increasingly for reforestation because
they have a better chance of overcoming competing vegetation,
especially in southern Québec, where it is abundant. They
have grown in popularity since 2001, when the use of phytocides
was banned in the public forests.
- Monitoring and Maintaining Plantations
| If tree growth is found to be delayed in the years following
reforestation due to the presenceof competing vegetation,
the stand is mechanically released or weeded. |
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