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A comprehensive analysis was conducted using the gray system theory to determine the correlation between the climatic low temperature and the banana cold injury and yield reduction in Yunxiao county in 1999.The highest correlation between them was found to be the number of days when the daily minimum temperature was below 5.0 ℃ in every sliding five days.Thus,the following recommendations were submitted for the prevention of banana cold injury:(a) map the planting areas based on the meteorological data;(b) disseminate cold injury prevention information to the farmers;(c) emphasize prevention during the early growing stage;(d) improve plant's low-temperature resistance by increasing nutrients reserve;and(e) apply water spraying,heat fumigation and/or fruit-bagging at time of broadcasted cold spells to minimize the damage.
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