Propagation of trees in landscape and it's methods

Propagation of trees in landscape and it's methods , techniques used in landscape

1. Propagation of trees in landscape Presented by MJ . GAYATHIRI 22164106 SCHOOL OF AGRICULTURE Submitted to Kumaresan . M ASSISTANT PROFESSOR VISTAS

2. Grafting Grafting is a propagation technique usually employed to improve the quality of the nursery stock or to produce seedlings that carry the plus qualities of a mother plant. It is carried out by bringing together two vegetative parts from two different plants of a same species and joining them together to grow as a single plant. This technique is used to propagate plants that do not root well from cuttings, to utilize superior root systems, or to maintain clonal production. Types of grafting Approach grafting: Done while growing on the parent plants Wedge grafting: Graft union by the form of a wedge Epicotyl grafting: Grafting is done on the tender shoot Softwood grafting: Done when seedling is about 6 months

3. Why grafting? Reproduce vegetative Change variety Add pollinizer. Change root system Produce certain plant forms Repair damaged plants Create designs Grafting Tools Grafting knives Box cutter plastic film

4. Procedure Selection of stock Splitting of rootstock Preparation of scion Tying of graft union Sprouting of scion Removal of plastic cap Ready for planting material

5. Layering Layering is a technique of plant propagation where the new plant remains at least partially attached to the mother plant while forming new roots and can occur naturally through modified stem structures The techniques required are easily mastered by the home gardener. Layering techniques allow desired shrubs, vines and indoor plants to be propagated using less space.

6. Types of layering Air layering On the selected shoot, preferably on the basal portion, a ring of bark is removed and the exposed wood is scraped. The exposed portion is further wrapped with moist inert rooting medium like Sphagnum moss, moist coir etc. And covered with a polythene sheet making it air tight Mound layering Mound layering is a plant propagation technique where a stem of the parent plant is partially buried in the ground, forming a mound of soil around it. This method is effective for plants with horizontal stems, such as purple and black raspberries or closely branched shrubs.

7. Serpentine layering Serpentine layering is a plant propagation technique suitable for long arching stems or vine-like plants. In this method, portions of the stem are buried intermittently along its length in shallow trenches or mounds of soil. Simple layering Simple layering is a straightforward plant propagation technique where a flexible stem of the parent plant is bent and buried in soil while still attached to the parent. By encouraging roots to form along the buried stem, new plants develop their own root systems, making them independent once severed from the parent. Tip layering Dig a hole 3 to 4 inches deep. Insert the shoot tip and cover it with soil. The tip grows downward first, then bends sharply and grows upward. Roots form at the bend, and the recurved tip becomes a new plant.

8. Cuttings Propagation through cuttings is an easy and less expensive method of vegetative propagation. A cutting is usually a division of the stem, or root or leaf of a plant. A cutting is a vegetative plant part which is severed from the parent plant in order to regenerate itself, thereby forming a whole new plant. Types of cuttings Hardwood cuttings Cuttings taken from the branches of the current year's growth of a plant are usually considered to be Hardwood cuttings These cuttings usually measure 25-30 centimetres with 4-5 nodes. Cuttings of pencil thickness with uniform internodal growth are preferred.

9. Semi hardwood cuttings These are cuttings prepared from tender shoots and branches of the current year's growth that are not too hard but show brown blotches on the green stem They usually measure about 20 centimetres with a pair of leaves retained at the tip. Softwood stem cuttings Those cuttings prepared from the soft tender shoots that are still green are considered softwood cuttings. These cuttings usually measure 8-10 cm with a growing tip and the leaves are usually retained at the tip.