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題 名 | 鳳梨日燒與寒害發生機制及防護措施之初探=Studies on Mechanisms of Sun Burn and Cold Damage to Pineapples and Mitigation Techniques |
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作 者 | 李炳和; 官青杉; 唐佳惠; 蔡惠文; 申雍; | 書刊名 | 氣象學報 |
卷 期 | 48:3 2011.09[民100.09] |
頁 次 | 頁73-87 |
分類號 | 433.1 |
關鍵詞 | 鳳梨; 日燒; 紫外線; 寒害; 畸形果; Pineapple; Sun burn; UV; Cold damage; Abnormal shaped fruit; |
語 文 | 中文(Chinese) |
中文摘要 | 夏季期間鳳梨容易遭受日燒傷害,冬季低溫則容易導致畸型果,兩者 都會影響商品價值。本研究於鳳梨果園內進行不同防護處理並進行微氣象 觀測,探討導致夏季發生日燒、冬季發生畸型果的條件與可能機制。結果 顯示,若無防曬措施,有50%的果實會發生嚴重日燒,當氣溫超過36℃且 持續5小時以上,日燒嚴重果實的表面溫度將會超過50℃,且持續時間達 3小時;若覆蓋黃色防曬帽,果皮最高溫度多在45℃以下,且僅有輕微曬 傷現象;若覆蓋可阻擋UV之PE布或一般PE布,兩者之嚴重日燒果率均為 8.3%。由於不論是否使用具有隔離紫外線效果的塑膠布對於降低日燒的效 果相同,因此果皮溫度過高才是最導致日燒發生的決定因子。 冬季期間雖然曾有氣溫低於10℃達10小時,且鳳梨生長點溫度低於5℃ 的狀況發生,導致葉片產生輕微寒害,但果實卻未產生明顯可見之傷害,顯 示低溫並非導致鳳梨果實發生寒害的唯一因子,可能仍需伴隨降雨,才會因 蒸發冷卻的效應,導致花芽或幼果的溫度更為下降,因而產生畸形果。 |
英文摘要 | Market values of pineapples are affected by the sun burn damage during summer and the abnormal shape during winter. In this study, climatic conditions and possible mechanisms that might induce sun burn or abnormal shape were discussed based on micrometeorological data and fruit damage survey with various mitigation treatments. Results indicated that more than 50% of the fruits would be sun burned without any protection. The skin temperatures of severely sun burned fruits were higher than 50℃ and lasted for at least 3 hrs under air temperatures exceeding 36℃ longer than 5hrs. With the “yellow hat” mitigation treatment it had only minor damage, and the skin temperatures seldom exceeded 45℃. Simple greenhouse covered by UV-cut or regular PE films both reduced the percentage of severely damaged fruits to 8.3%. However , there was no difference in protection against sun burn damage by UV-cut or regular PE films. Therefore, it is expected that the overly high skin temperature may be the determining factor in occurring sun burn. Air temperatures lower than 10℃ lasting for 10 hrs, which caused <5℃ at bud growth region, were experienced during the winter in this study. However, no abnormal shaped fruits were observed. Therefore, it is expected that low temperature may not be the only factor for producing abnormal shaped fruits. Buds and young fruits were likely to be damaged under low temperature accompanying with rain as a result of severe evaporation cooling. |
本系統中英文摘要資訊取自各篇刊載內容。