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Climate Changes and Its Effect on Litchi Yields of Xinyi City

PAN Zhu et al(Xinyi Meterological Bureau,Xinyi,Guangdong 525300)  
The data of monthly mean temperature,precipitation and sunlight of Xinyi City during 1954-2006 were analyzed by using bandpass filter,linear trend analysis,Mann-Kendall method and wavelet analysis,so the climate changes of Xinyi City were studied.Through comparative analysis between climate change and meteorological yield of litchi,the results showed that the meteorological yield of litchi would get over high if the mean temperature had an obvious warm tendency;excessive precipitation would make against increase of meteorological yield of litchi;when sunlight during litchi growth was sufficient meteorological yield of litchi would increase.In recent years,the mean temperature had a warm tendency,precipitation has become more and sunlight has a rising tendency,so it was expected that meteorological yield of litchi will become more higher.
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