Environmental Hurdles in East Tennessee
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Transcript of Environmental Hurdles in East Tennessee
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Environmental Hurdles in East Tennessee
Jeff Martin, Master’s CandidateCrops Group- University of Tennessee
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Background on Strawberry Production in High Tunnels
• Strawberry plants under high tunnels were not only better established, but also produced higher yields and quality than open field plants (Kadir et al., 2006).
• Early yields increased inside high tunnels when compared with those from open fields. Strawberry total marketable yields maximized inside high tunnels in comparison with open fields (Salam-Donoso et al., 2010).
• Producing strawberries in the fall and following spring using high tunnels resulted in higher yields than those grown in the open field (Fernandez and Ballington, 2003).
• Tomatoes grown in high tunnels contained significantly higher levels of lycopene, sugars and red color (Wszelaki and Rogers, 2009).
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Background
• Six varieties– Season one varieties differ from season two– Marketability of fruits– Reasons for unmarketability
• Quality measurements– Soluble Solids– Titratable Acidity– Color– Firmness– Environmental problems causing limited progress
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Season 1- Strawberry Varieties
• Spring- Day Neutral– Albion– Seascape– San Andreas
• Fall- June Bearing– Strawberry Festival – Sweet Charlie– Chandler
• 28 plants per variety• Planted staggered in
a double row 1’ apart
• High tunnels planted March 23, 2010
• Open field planted April 22, 2010
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TN Weather Conditions• Spring and Fall– Extreme temperature
fluctuations– Heavy rains– Strong winds– Late frost date
• Summer– Hot and dry
• Winter– Cold and wet
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Season 1 Issues
• Spring planting• Too hot, too fast• Poor pollination• Limited production• Small plants
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Season 1
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Season 1- Yields
Marketable Yield/Plot (lbs)
Unmarketable Yield/Plot (lbs)
VarietyHigh
TunnelsOpen Field
High Tunnels
Open Field
Albion 1.56b 0.07b 0.18b 0.2b
Seascape 2.31a 0.59a 0.46a 0.36a
San Andreas 1.12b 0.03b 0.37a 0.19b
LSD (.05) 0.69 0.10 0.20 0.08
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Season 2 Adjustments
• Fall planting• Winter plant
protection• Supplemental
pollination • Earlier harvests• Increased production
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Season 2- Plant Establishment• Late fall planting– Plug plants• Albion, LCN,
Strawberry Festival• October 8, 2010
– Bare-root plants• Albion, San Andreas,
Chandler• October 29, 2010
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Season 2- Number of Plants per Plot
VarietyHigh Tunnels
Open FieldAlbion (B) 25.5a 27.75 aAlbion (P) 26.5a 27.25abChandler (B) 26.0a 25.25 bLCN (P) 11.5c 22.5 cSan Andreas (B) 26.75a 27.75 aStrawberry Festival (P) 20.0b 25.75abLSD (0.05) 4.4 2.2
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Season 2- Overwintering
• Open Field– Agribon AG-30 and
AG-19 row cover
• High Tunnel– No row cover
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Season 2- Preliminary Yields
Marketable Yield/Plot (lbs)
Marketable Yield/Plant (lbs)
Unmarketable Yield/Plant (lbs)
Variety High
TunnelsOpen Field
High Tunnels
Open Field
High Tunnels
Open Field
Albion (B) 4.3 d 1.5b 0.2 d 0.1bc 0.5 c 0.2 cAlbion (P) 10.9 ab 4.9a 0.4 b 0.2 a 1.2abc 1.2abChandler (B) 8.6abc 1.7b 0.3bc 0.1 b 1.7 a 0.5 cLCN (P) 5.2 cd 1.4b 0.4 b 0.1 c 0.3 c 0.7bc
San Andreas (B) 7.1bcd 1.8b 0.3cd 0.1bc 0.6 bc 0.3 cStrawberry Festival (P) 11.9 a 3.6a 0.6 a 0.1ab 1.6 ab 1.5 a
LSD (0.05) 3.9 1.6 0.13 0.07 1.04 0.54
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Season 2- Reasons for Unmarketability
% Poor Pollination (by weight)
% Pest Damage (by weight)
% Leather Rot (by weight)
VarietyHigh
TunnelsOpen Field
High Tunnels
Open Field
High Tunnels
Open Field
Albion (B) 24 72 26 9 26 14Albion (P) 46 65 19 5 29 22Chandler (B) 46 67 19 19 29 10LCN (P) 72 90 16 9 17 0San Andreas (B) 38 71 18 15 35 14Strawberry Festival (P) 71 84 27 4 1 5
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Season 2- Pollination
• One hive per high tunnel
• Six week replacement rotation
• Koppert Class C Hive
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Season 2- Improvements
• Higher yields• Vigorous plants• Improved pollination• Earlier harvests
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Season 2- Hail Damage
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Season 2- Hail Damage
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Season 2Open Field- before and after
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Season 3 Adjustments
• Early to mid-September planting
• Heavier row cover – Ag-50 and Ag-30
• Replenish bumble bee hives after 4 weeks and utilize in open field
• Examine quality differences – Late fall/early winter and
spring/summer– Color, firmness, sugars, acidity,
post-harvest
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Biodegradable Mulches for Specialty Crops Produced Under Protective Covers
Debra Inglis and Carol Miles (Project Directors)1;Andrew Corbin, Ana Espinola-Arredondo, Annabel Kirschner, Karen Leonas, Tom Marsh and Tom Walters1;
Doug Hayes, Bobby Jones, Jaehoon Lee, Larry Wadsworth and Annette Wszelaki2; Eric Belasco and Jennifer Moore-Kucera3; Russ Wallace4; and, Marian Brodhagen5
1 25
SCRI Grant Award
No. 2009-51181-05897
43
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Questions?