Effect of Sprinkler and Wind Machine on Frost Protection during Flowering of Pear Trees
2011
Choi, H.S., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Jo, Y.S., Chonnam National University, Gwangju, Republic of Korea | Kim, W.S., Chonnam National University, Gwangju, Republic of Korea | Jo, J.A., Chonnam National University, Gwangju, Republic of Korea | An, Y.J., Chonnam National University, Gwangju, Republic of Korea | Lee, Y., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
This study was performed to decrease frost damage of 'Wonhwang' pear (Pyrus pyriforia) trees by operation of sprinkler and wind machine during a flowering in Naju, Chonnam. Sprinkler and wind machine were stipulated to activate less than 2℃ during April of 2010. Orchard minimum temperature was elevated by sprinkler and wind machine compared to those of control when the temperature was less than 0℃; both treatments reduced approximately 50% frost damage of inflorescence and increased two times fruit set compared to the control. Trees treated by sprinkler and wind machine produced approximately 50% uniform fruit compared with 38% uniform fruit in control trees. Fruit setting degree of uniformity was 2 times higher at the control trees than those of the sprinkler- and wind machine-treated trees, which indicated that the control trees had lack of uniformity of the fruit setting degree, mostly due to the severe frost damage of the flusters.
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