Author：Ching Hua Chien^1* and Ru Hong Lin²

Abstract：

    Tea is an important economic crop in Taiwan, tea-growing area from north to south, located in different latitude, altitude and weather patterns, changes in rainfall therefore also with regional differences. Survey precipitation changes in 2004–2013, annual precipitation of nearly 10 years with greater change, the southern tea-growing areas was the most significant and eastern tea-growing areas was lesser extent. Observation of the rainfall distribution in each month between years, 2012 and 2013 the difference of dry season and wet season was more significant, especially in central and southern tea-growing areas, resulting in water shortage during tea leaf emergence stage of spring and winter, affected tea leaf bud germination and cause reduced production. The average of rainy days is highest in northern tea-growing areas, rainy days number in northern and eastern tea-growing areas increased slightly in nearly two years, the change of central and southern tea-growing areas was small, the heavy rainfall was occurs more frequently in northern, central and southern tea-growing areas than the eastern in 2012 and 2013, heavy rainfall cause the soil and nutrient loss and increased the management costs, reduced the tea production quality. Tea plantation drained too slow cause the tea root system injured and infect the tea growing, tea plants can’t absorption of water normally and reduced the yield. Tea brown blight and die-back blight infected effected by the interaction of rain and temperature, and the years with less precipitation the leafhopper occurs more serious. This investigation provides farmers as a reference of cultivate and product managed to reduce agricultural losses due to precipitation change.

Keywords: Tea, Precipitation, Heavy Rainfall.

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¹ Tea Research and Extension Station, chinghua@ttes.gov.tw.
² Tea Research and Extension Station, jhlin@ttes.gov.tw.
* Corresponding Author, Email:chinghua@ttes.gov.tw; Tel: 049-2855106.

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