PLANT PROPAGATION AND NURSERY MANAGEMENT

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Presentation transcript:

PLANT PROPAGATION AND NURSERY MANAGEMENT HORT 203 PLANT PROPAGATION AND NURSERY MANAGEMENT Ms T. Mushayabasa

INTRODUCTION The propagation of plants is a fundamental occupation of humankind. Agriculture began years ago and the people who lived as hunters and gatherers began to cultivate plants and domesticate animals.

Introduction These activities led to stable communities where people began to select and propagate all kinds of plants to supply food. The concept of the nursery, where plants are propagated to be transplanted to their permanent site or to be sold has been a part of agriculture since the beginning

Definitions Plant propagation maybe defined as production of more than one plant from the mother plant or the tissue over a specific time period (Chanana and Gill, 2008). Plant propagation is the process of creating new plants from a variety of sources: seeds, cuttings, bulbs and other plant parts.  

Purposes of plant propagation The production of true to type progeny from the mother plant is the prime objective of propagation. Other purposes include: Multiply the number of a species Perpetuate a species Maintain the youthfulness of a plant

The modern plant propagation industry is large and complex and involves: Multiplication of plants for sale Providing services Selling of products Formulation of regulations Research Teaching Consultancy.

A plant propagator therefore should have the knowledge and possess the skill to perform or to supervise the essential propagation tasks for specific plants. Plant propagation is primarily done by conventional methods: sexual propagation (union of pollen and egg) and: asexual propagation (regenerate part of a parent plant into a new plant) methods.

Plant propagation advances through biotechnological applications (tissue culture) have made great contributions towards mass scale production of plants. Qualitative and quantitative food can essentially be produced from healthy plants which in turn are produced only when their seedlings/sapplings are vigorous and healthy.

Nurseries are a basic need for crop production. Plant propagation techniques and practices is the core of horticulture nurseries. The success of a nursery depends on quality and “truthfulness” of mother plants. Mother plants are required for both stock and scion.

Mother plants should be selected on the basis of: Genetic traits and Availability Adaptation in the growing environment. Most of the horticultural crops are propagated vegetatively for which nursery units are necessary.

Role of Nurseries in Horticulture Development 1. Production of Genetically Pure Nursery Stock Genetically pure planting material is essential for healthy and vigorous plant growth. Both stock and scion should be genetically pure. The planting material should be satisfactory in quantity and quality and easily available for further multiplication

Role of Nurseries in Horticulture Development 2. Export of Nursery Stock Globalization has improved the chances of export of quality planting material to other countries. Special techniques and care are required for exporting the nursery material. Similarly, Great care is necessary while importing nursery material from other countries

Role of Nurseries in Horticulture Development 3. Employment Generation Demand of skilled professionals for grafting, budding, potting, repotting and other nursery operations is high. Nursery provides employment opportunities for technical, skilled, semi- skilled and unskilled labor. Nursery can itself be a very renumerative enterprise in the changing national scenario.

Role of Nurseries in Horticulture Development 4. Role of Nurseries in Dry Land Horticulture Like Zimbabwe, there are many countries in this world, which face droughts every other year. Growing drought tolerant fruit crops provides assured income to farmers. Horticultural plantations play an essential part in afforestation and thereby help to reduce the global warming.

Types of Plant Propagation Nurseries A nursery is a place where plants are propagated and grown to a usable size. The various types of nurseries can be classified based on various criteria. They include: Retail nurseries which sell to the general public. Wholesale nurseries, which sell only to businesses such as other nurseries and to commercial gardeners, private nurseries which suffice the needs of institutions or private estates.

Plants may be propagated by seeds (sexual), Desirable cultivars are propagated asexually by budding, grafting, layering, or other nursery techniques. Nurseries often grow plants in a greenhouse, a building of glass or plastic, designed to protect young plants from harsh weather while allowing access to light and ventilation.

Modern greenhouses allow automated control of temperature, ventilation and light and semi-automated watering and feeding. Some also have fold-back roofs to allow "hardening-off" of plants without the need for manual transfer to outdoor beds. Most nurseries remain highly labor- intensive. Although some processes have been mechanized and automated, others have not.

It is not always that plants treated in the same way at the same time will arrive at the same condition together. Plant care and horticulture nursery management require observation, judgment and manual dexterity (skill in performing tasks, esp. with the hands). Selection for sale also requires human comparison and judgment.

It has been estimated that manpower accounts for 70% of the production costs of a horticultural nursery. Nursery like any other enterprise requires certain resources. The criteria for selection of products also depends on these resources. These resources thus play a very important role in determining the type of nursery enterprise.

Physical Resources for Nurseries Land: is the basic and fundamental physical resource for a plant nursery. The area available must be considered before planning the nursery and the products. Soil sample testing should be done to avoid problematic and unmanageable soils. Soil should be well drained, porous and light to medium in texture. Soil pH should be 6.5 – 7.5.

Physical Resources for Nurseries Low lying land should not be selected. The soils should be free from salts and other harmful elements. The selected site should be close to railway station or bus station. Wind breaks and shelter belts should be raised prior to planting nursery plants. 2. Irrigation Facilities: Required land with sufficient and assured supply of irrigation is the most important basic resource.

Physical Resources for Nurseries Quality of irrigation water should be at prescribed levels. Harmful factors can be tested by water testing in laboratory. The pH and electrical conductivity (EC) of irrigation water should be tested. 3. Labour: Labour is another important resource. The degree of mechanization must be considered before estimating the labor requirement.

Physical Resources for Nurseries Skilled as well as unskilled man power is necessary for grafting, budding, weeding, irrigation, spraying, dusting, training, pruning, etc. Technically sound gardeners are also necessary. Labour should be available at reasonable rates. 4. Electricity: The availability of power or electricity is also very important and is in accordance with the man power available.

Load shedding should be minimum possible. Regular supply of electricity is very essential. Electricity is required for water pumps, spraying, dusting and many other automated operations. 5. Road and Transport: Once the nursery stock is ready for sale, there should be good roads and transport facilities.

Physical Resources for Nurseries These facilities are also required for timely importing of stock and other material for the nursery. 6. Mother Plants: Mother plants are the most important factor for successful nurseries. Separate planting of mother plants is necessary. Different varieties of mother plants are planted in different plots.

Physical Resources for Nurseries Pests and diseases should be controlled regularly by spraying pesticides and fungicides. Mother plants should be authentic. Mother plants should be selected very carefully as the sale of the nursery stock depends on the mother plants used for the propagation.

7. Propagation Structures: Propagation structures are very essential for production of grafts or seedlings. They are useful for multiplication of grafts and seedlings. ‘Hardening off’ of plants is done with the help of propagation structures.

Physical Resources for Nurseries 8. Hedges and Compound: Thorny plants like Chilar (thorny creeper), golden duranta (thorny shrub), are used as hedges in nurseries. Barbed wire fencing is also used. Hedges protect the nursery plants from wild and stray animals, theft. They fix the borders of the nursery and are ornamental and decorative.

Physical Resources for Nurseries 9. Space for Hardening of Nursery Plants: Small shade net houses are required for hardening of nursery plants. Young seedlings that were grown either indoors or in a greenhouse will need a period to adjust and acclimatize to outdoor conditions, prior to planting at their permanent stations. This transition period is called "hardening off".

Hardening off gradually exposes the tender plants to wind, sun and rain and toughens them up by thickening the cuticle on the leaves so that the leaves lose less water. This helps prevent transplant shock in which the seedlings have a stunted growth or they die from sudden changes in temperature.

Physical Resources for Nurseries Hardening off time depends on the type of plants being grown and the temperature fluctuations. 10. Store and Office: Garden tools, implements, raw materials, insecticides, fungicides, manures, fertilizers, boards, polythene bags etc are kept in store house

Physical Resources for Nurseries An ideal nursery has at least one well managed office for keeping all registers, notebooks, information books and for instructing the team. The record of mother plants, progeny, Stock of plants, etc is preserved in office.