TOFG-all

(Marcin) #1
Propagation/Greenhouse Management

Unit 1.3 | Part 1 – 127
Instructor’s Demonstration 1 Outline


Demonstration 1: Greenhouse Management


for the instructor


OVERVIEW


This demonstration provides


students with an understanding


of the working components of the


greenhouse facility and the tools


available to manage environmental


conditions that best meet the needs


of pre-emergent and seedling


crops in the facility. Students


should become familiar with the


fundamental skills and concepts to


create ideal growing conditions, such


as temperature and air circulation


management.


PREPARATION AND MATERIALS


  • A working greenhouse structure where the essential
    management tools and techniques can be discussed and
    demonstrated

  • Thermometer and Appendix 12, Greenhouse Records
    Sheet, to show current conditions and records of recent
    temperature fluctuations

  • Thermometers positioned in different microclimatic zones
    (if applicable) to show how differences can be used to meet
    different plant needs under a single management regimen


PREPARATION TIME
1 hour

DEMONSTRATION TIME
1 hour

DEMONSTRATION OUTLINE

A. Managing Greenhouses


  1. Discuss and demonstrate orientation of greenhouse
    (i.e., solar aspect)

  2. Discuss and demonstrate methods for air circulation via
    venting, fans, etc.

  3. Discuss and demonstrate temperature management
    a) Ideal temperature ranges (see Appendix 3)
    b) How heat is retained
    c) The use of thermal mass in heat retention
    d) Techniques for evaporative cooling
    e) The role of venting in maintaining ideal temperature,
    humidity, and gas exchange
    f) Active heating systems

  4. Use of microclimates within greenhouse

  5. Discuss and demonstrate record keeping in the
    greenhouse (see Appendix 12)
    a) Date
    b) Previous high/low
    c) Current temperature
    d) Weather description
    e) Description of environmental conditions in
    greenhouse
    f) Management actions taken

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