影響大葉種茶樹日燒症之環境因素
Other Title
Environmental Factors Affecting Sunscald of Large-leafed Tea
Start Page
160
End Page
165
ISBN
978-986-03-9618-8
Date Issued
2013-12
Date
2013-12
Author(s)
Abstract
氣候變遷導致茶區夏季偶有高溫熱害問題，尤以大葉種茶樹如台茶18號(紅玉)之於中低海拔栽培有夏季葉片日燒問題。於2011至2013年夏季連續3年調查魚池與名間茶區參試園大葉種茶樹結果顯示，台茶18號較小葉種茶樹(如四季春、青心烏龍、金萱、翠玉等品種)易罹葉片日燒症，台茶18號在夏季高溫年依試區不同日燒症面積百分率在 15-50%之間，而小葉種茶樹則全無日燒症發生，日燒症發生影響次一季新芽萌發，芽長平均只為無受害茶芽之1/4。大葉種茶樹日燒症之發生與環境因素有密切關係，試驗調查顯示好發於無遮陰茶園，茶園位於盆地地形中有太陽西曬通風情況不良，茶園鄰高坡坎影響中午熱氣流逸散，位於柏油馬路旁之平台式茶園，此外茶園土壤水分狀況不佳易為一影響因子。
Climate change causes occasional heat injury problems on summer tea, especially on large-leafed tea such as TTES No. 18 (Ruby) cultivated in the low altitude, having a summer leaf burning issue. In the summer of 2011 to 2013 for three consecutive years we conducted surveys on four large-leafed tea gardens located at Yuchi and Minchen, respectively. The result shows that TTES No. 18 was easy to suffer sunscald as compared to that of smaller leafed tea cultivars, such as the Suchichuan, Chinsin Oolong, Jin Xuan, and Jade etc. Depending on tested gardens, percent diseased area of summer sunburn ranged from 15% to 50% in TTES No. 18, while all the smaller-leaf cultivars had no sunburn outbreak. Sunburn damage tended to affect coming sprout germination of next season, with average shoot length only one quarter of non-victimization one. Large-leafed tea sunburn was closely related to the conditions of environmental factors. In conclusion, the investigation shows that sunscald tended to occur in tea garden with no shading. Tea gardens located in the basin topography with poor ventilation and exposure to hot full sun at noon. Tea plants growing in full sun or against a south- or west-facing down slope often got sunscald. It was because hot air was hard to escape during hot noon. The platform-type tea garden located in asphalt roadside was aptly suffered sunburn. Sunscald was a particular problem in large-leafed tea after summer plucking. In addition, bad soil moisture conditions were one of affecting factors.
Event(s)
102年度農業工程與自動化計畫成果研討會
Proceedings of the Symposium on Agricultural Engineering and Automation Project Achievements, 2013
Subjects
大葉種茶樹
台茶18號
氣候變遷
日燒症
Large-leafed tea
TTES No. 18
Climate change
Sunscald
Publisher
農業試驗所
Type
book part
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no177-28.pdf
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1.38 MB
Format
Adobe PDF
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