post-harvest handling and transportation methods that ... · post-harvest handling and...
TRANSCRIPT
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Post-Harvest Handling and Transportation Methods that Allow Small-Scale Growers To Deliver Top-Quality ProduceJeff Kindhart, University of Illinois
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Why are good post harvest practices important?
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High-quality, disease free produce
with a good shelf life is a result of
good production practices, proper
handling during harvest, and
appropriate post harvest handling
and storage. ---- ATTRA, Post
harvest handling of fruits and
vegetables
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Maintain Quality
Appearance
Texture
Flavor
Nutritive value
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Protect Food Safety
Maintain good sanitation
Avoid introduction of pathogens
Keep from spoilage
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Reduce Losses Between Harvest and Consumption
Improves efficiency
Improves profitability
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Process begins the moment produce is harvested
Avoid rough handling– Train workers – what and how
Use appropriate harvesting container
Try to avoid harvest in excessive heat
Keep product as cool as possible while awaiting transport to the packing shed – Shade
– Get to the shed
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Packing Methods
None ????
Field packing
Packing shed
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Field packing
Picking into final package
– Reduced handling and associated damage
– Reduces labor cost
– Strawberries and peaches
Self propelled field packing systems
– Peppers and snap beans
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Trip from field to packing shed
Slow down ---- smooth ride
Keep shaded if long trip or will sit out at shed before being packed
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Packing Shed
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Packing Shed
Roof with or without sides
Packing line
Cold storage area
Loading dock
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Packing line
Should be appropriate for size of your operation
Should be designed to work with commodity you grow
Vary widely by producer
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Components
Dump
Receiving line
Washer (waxer)
Inspection table
Sizer (label applicator)
Sorting tables
Boxing
Conveyors
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Cold Storage
Most important factor for maintaining quality
– Removes field heat
– Lowers respiration
– Reduces water loss
– Decreases sensitivity to ethylene
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Even after picking, strawberries remain alive and produce heat as a natural consequence of respiration. The amount of heat they produce depends on the storage temperature. At 32 F a ton of strawberries will produce approximately 3,300 Btu per day, whereas at 80 F, a ton will produce
41,800 Btu!
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Why cool?
Suppress enzymatic degradation and respiratory activity (softening)
Slow or inhibit water loss (wilting)
Slow or inhibit the growth of decay-producing microorganisms (molds and bacteria)
Reduce production of ethylene (a ripening agent) or minimize the product's reaction to ethylene.
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Lowest safe temperature
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Cold storage compatibility
Ethylene
– Producer
– Sensative
Similar temperature
Similar relative humidity
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Cold storage methods
Mechanical Refrigeration
Evaporative
Ice
Underground
High altitude
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Mechanical Refrigeration Cooling
Forced Air
Room Cooling
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Introduction to
Proper Postharvest Cooling and Handling Methods
Prepared by
M. D. Boyette, Extension Agricultural Engineering Specialist
L. G. Wilson, Extension Horticulture Specialist
E. A. Estes, Extension Marketing Specialist
Sponsored by the Energy Division, North Carolina Department of Commerce, with petroleum violation
escrow funds, in cooperation with the Agricultural Extension Service, North Carolina State University. Any
opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not
reflect the views of the Energy Division, North Carolina Department of Commerce.
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Room Cooling
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Forced Air Cooling
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COOL AND SHIP:
A LOW-COST, PORTABLE FORCED-AIR COOLING UNIT
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Transportation Methods
Open Vehicle
Refrigerated Vehicle
– Box Truck
– Tractor Trailer
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Resources
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Postharvest Cooling and Handling ofStrawberries
http://www.bae.ncsu.edu/programs/extension/publicat/postharv/ag-413-2/index.html