This presentation is about Layering,type of layering, method etc.
that will be help to agriculture student, teacher, farmer as a whole agriculture related people.
2. Council for technical technical education and vocational training
Tikapur polytechnic institute
Submitted by submitted to
Krishna raj joshi Hemant neupane
Agriculture department
3. LAYERING
• The development of roots on a stem while the
stem is still attached to the parent plant is
called layering.
• A layer is the rooted stem following
detachment (removal) from the parent plants.
• Layering is an easy way to start new plants
from old ones.
4. Advantage of layering
• The success rate is higher than other asexual
method.
• Simple and easy method than other methods.
• Low cost than other methods.
• Plant being rooted benefits from the
resources of water and nutrients that the
mother plant provides.
5. Disadvantage of layering
• Not suitable for all type of ornamental plants.
• Required the more time than other methods
• Fewer plant can be started from each parent
plant.
6. Physiology of layering
• The flow of carbohydrates, hormones and other
organic substances is interrupted by the removal
of the bark through notching or girdling (removal
of bark).
• The accumulation of these organic substances in
the stem facilitates rooting.
• The rooting media is provided for the proper
development of roots.
• When sufficient roots are formed the plantlets
are severed from the mother plants.
7. Different methods of layering
• Simple layering
• Air layering.
• Mount or stool layering.
• Compound layering.
• Trench layering.
•
8. Simple layering
• In this method the branches of stem are bent
towards the ground and portion to be layered is
covered with soil leaving the tip of the shoot
exposed above the ground.
• Sometime a notched or girdle is necessary to
stimulate the root formation.
• A wooden peg or stone may be used to anchor
the stem buried part of the stem.
• Rhododendron, lemon, lime, climbing roses etc.
10. Compound layering
• It is same as simple layering but differs by
cover and expose section of the stem.
• Each section should have at least one bud
exposed and one bud covered with soil.
• Wound the lower side of each stem section to
be covered facilitates rapid root growth.
• This method is mostly applied in Muscadine
grapes & other vines.
11.
12. Trench layering
• In trench layering, a branch is laid horizontally in a
small trench to encourage the development of
several new shoots from it.
• The little plants can then be removed from the
original trench after roots have formed.
• This method is used primarily for fruit trees which
are difficult to propagate by other methods.
Eg apple, walnuts, pear, peach
14. Mount or stool layering
• Mound (stool) layering is useful with heavy
stemmed, closely branched shrubs and rootstock of
tree fruits.
• Mound soil over the new shoots as they grow.
• Roots will develop at the bases of the young
shoots.
• Remove the layers in the dormant season.
•This method is successful with gooseberries and
apple rootstocks.
16. Air layering
• Air layering is also called “Gootee”, Chinese layering or marcotting.
• In this method roots are produced in the branch of tree.
• No twisting or tending are required.
• First girdle or bending are required.
• First girdle the bark along with cambium layer between two buds.
• Rooting is encouraged by placing the rooting media (moist
soil+sphagnum mass) in the girdled portion and wrapped with plastic
or gunny bag and tied properly.
• When root is formed detach the plant and grown as new plant.
• Example Rubber plant, litchi, guava, jackfruit, lemon etc.