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The Influence of Insulation Wraps on the Temperature Change of Kiwifruit Trunk Surface During Winter
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 Title & Authors
The Influence of Insulation Wraps on the Temperature Change of Kiwifruit Trunk Surface During Winter
Kwack, Yong-Bum; Kim, Hong Lim; Kim, Seong-Cheol; Kim, Mok-Jong; Lee, Yong-Bok;
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BACKGROUND: Kiwifruit is a warm-temperate, deciduous fruit tree. It is sensitive to frost or freeze damage during winter. Therefore, the farmers cover kiwifruit trunk with rice straw to preclude freeze injury. This study was conducted to evaluate trunk wraps for protection of freeze injury of kiwifruit (Actinidia deliciosa) vines. METHODS AND RESULTS: The experimental orchard was located in Sacheon (lat. , long. ) of Gyeongsangnam-do, South Korea. The vines were 5-6-year-old 'Hayward'. Two wrap materials, rice straw and silver-cushioned mat (reflective foil-coated, plastic-foamed mat, Ganan Industry, Rep. of Korea) were evaluated for their heat-retaining ability. The trunks of kiwifruit vines were wrapped in late December, and the wraps were removed in mid-April the following year (2012/13 and 2013/14). Temperature inner wraps were recorded from January to March in 2013 and 2014 by WatchDog 2450 (Spectrum Technologies, Inc., USA). In 2013, the lowest ambient temperature of January and February was , , respectively. The lowest temperature of inner-wrap of silver -cushioned mat was , in January and February, respectively. However, rice straw showed and in its lowest value of January and February. And also silver cushioned mat appeared to be superior to rice straw in its ability of heat-retaining during night time.
Freeze injury;Heat-retaining;Kiwifruit;Trunk;Wrap material;
 Cited by
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