Page 40 - Tài liệu Ebook cây cảnh Bonsai Basics

42 OBTAI I G YOUR BO SAJ
1

Layering
This technique is similar to taking
cuttings to the extent that it is based on
the principle of producing spontaneous
root growth from a shoot. But in
layering, rooting takes place without the
cutting being separated from its parent.
Roots develop after a part of a branch is
buried in the soil or in other medium
conditions that favour rooting. This is a
gentler method of propagation, since the
cutting is not severed from its parent
until it is well rooted.
There are many different methods of
layering and we shall describe only the
1. The part of the layer to be buried in the ground
most familiar. A broad distinction can should be stripped of its leaves.
be made between ground layering, where
a branch or shoot is bent down to the
ground, and air layering.

GROUN D LAYERING
Here roots grow where a branch or shoot
is in direct contact with the earth. This
type of propagation is considered spon-
taneous, insofar as it is often found in
nature on plants with trailing branches,
such as wild rhododendrons.
SIMPLE GROUND LA YERTNG:
This technique is most like the natural
phenomenon. A low branch is bent
down to the ground, where it is held in
place by a wire hoop. The part of the
branch touching the ground is lightly 2. The defoliated part should be dipped in hormone
covered with earth, the rest being sup- rooting powder.
ported by a stake. To stimulate rooting,
the buried part should be brushed with
hormone rooting powder and its bark
lightly scored.
Simple layering is usually carried out
during the dormant period, so roots
should appear in spring. The layer can be
severed from its parent in autumn, but,
to be quite sure, it can always be left till
the end of the following winter.
To root a layer in a pot, just bend the
parent branch into a pot, then proceed
exactly as above. As some branches
might not be inclined to sit in the pot in
the way you would like them to, particu-
lar care should be taken to secure the
3. Bury the part of branch you wish to layer and
potential layering to stop it 'springing'
hold it in place with a ring or metal hoop.
from the pot.