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Hydroponics 101

by Carol Brouwer

Carol Brouwer

on 16 August 2011

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Transcript of Hydroponics 101

Disadvantages of Greenhouse Hydroponics Requires large capital investment and energy input (commercial).
Expertise in plant science, engineering, computer controls, and marketing.
The technology is limited to high cash value crops (for commercial production).
Plant diseases and insect pests can become difficult to control. Hydroponics 101 What do plants need to grow? H2O O2 CO2 Mineral nutrients Environment i.e. temperature and relative humidity Physical Support Categories of Hydroponic Systems Where are the roots? What happens to the nutrient solution? Liquid Culture Aggregate Culture Roots grow in aggregate Roots hang in the nutrient solution) Open System Drained to waste Closed System Active: recirculated
Passive: roots hang in the solution The Land Epcot Center, Walt Disney Word Aggregates http://www.simplyhydroponic.com/hydroponic-systems/5-types-of-hydroponic-systems
http://extension.unh.edu/resources/files/Resource000865_Rep911.pdf References Commercial DIY http://vfd.ifas.ufl.edu/suwanneevalley/hydroponicgreenhouse/index.shtml#main_season University of Florida Virtual Field Day Arnold Arboretum
Hydroponic Culture Boxes http://www.arboretum.harvard.edu/zwieniecki/methods/Hydroponics/hydroponics.html http://www.simplyhydroponic.com/hydroponic-systems/5-types-of-hydroponic-systems/building-a-simple-dwc-bubbling-bucket Build a Simple Bubbling Bucket Hydroponics Defined Advantages of greenhouses Grow year around
Control environment
Suitable for mechanization and automation. Crops can be produced on non-arable land.
Isolation from diseases and insect pests found in the soil.
Direct and immediate control over the root zone.
Higher yields (ex. tomato, tons per acre) field: 10-40; greenhouse hydroponics 300-600.
High density planting (tomato, plants per acre) field: 5000; greenhouse 11,000.

Efficient use of water and nutrients.
Ease of cleaning the systems (10% bleach and/or dilute acid).
No weeding or cultivation.
Transplanting of seedlings is easy – no transplant shock.
Consistent, year around production and crop quality. Advantages of hydroponics over soil Pros and Cons by Carol Brouwer, Ph.D. a technology for growing plants without soil; using a complete nutrient solution (water + mineral nutrients); with or without an aggregate medium to support the roots
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