Volume 67 Number 1 Article 6 Pages: 34-46
Year 2013 Month 1
Title: Influence of Orchard Design on 'Owari' Satsuma Mandarin Citrus unshiu (Marcovitch) Fruit Quality, Physiology, and Productivity
Authors: M.R. Harrison, J.D. Spiers, E.D. Coneva, F.M. Woods, J. Raymond Kessler, Jr., and W.A. Dozier, Jr.
Satsuma mandarin growers in Alabama attempt to mitigate freeze damage by using various orchard designs
such as interplanting between pecan or pine trees, planting in open fields with microsprinkler irrigation, and planting
The goal of this research was to determine the influence of different orchard designs on
canopy temperature, photosynthesis, leaf area, specific leaf area, yield, and fruit quality of satsuma mandarins.
Satsuma canopy temperature under dense pine tree canopy was warmer than control trees in an adjacent open
All trees in orchard designs that experienced shading had reduced photosynthesis.
Satsuma trees grown
under pine tree and pecan tree canopies had greater leaf area, and tended to have thinner leaves (greater specific
leaf area) when compared to trees grown in full sun.
Fruit from trees under dense pine tree canopies had reduced
fruit size, rind thickness, and vitamin C concentration.
There were no differences in fruit soluble solids concentration
due to the dense pine tree canopy treatment; however, fruit from moderate pine tree shading had increased
soluble solids concentration when compared to trees grown in full sun.
There was no reduction in photosynthesis,
fruit size, rind thickness, juice weight, or juice volume for trees planted behind a windbreak.
In addition to freeze
protection, the effects on photosynthesis and fruit quality should also be considered when selecting an orchard
design for satsuma mandarin production.
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