The Relationship Between Phenological Periods,Meteorological Factors and Yield of'Nuomici'Litchi
Based on the observational data of phenological periods,the meteorological data and yield of'Nuomici'litchi at Dongguan Meteorological Station in Guangdong Province from 2010 to 2023,the relationship between phenological periods and meteorological factors and yield of'Nuomici'litchi was analyzed by statistical analysis,so as to identify the key phenological periods and meteorological factors that affected yield and their contribution to yield.The results showed that the earlier appearance of end of flowering date(EFD),fruit growing period(FGP)and fruit maturing date(FMD),the higher yield it got,and the phenological dates of the HIGH yield years were 16 days,17 days and 7 days earlier than those in LOW yield years,respectively.In addition,there was a strong negative correlation between the number of precipitation days(PRD)and relative humidity(RH)and yield,and PRD in HIGH yield years was 29.2 days less than that in LOW yield years,and RH in HIGH yield years was 4.2%lower than that in LOW yield years.In different phenological periods,the meteorological factors with the greatest influence were different.From FMD to first shoot date(FSD),precipitation(PR)was negatively correlated with yield.From FSD to end of shoot date(ESD),the diurnal temperature range(DTR),mean maximum temperature(Tmmax)and daily average temperature(Tm)were significantly positively correlated with yield.From ESD to inflorescence date(ID),the RH was significantly negatively correlated with yield.There was a significantly negative correlation between PRD and RH and yield from first flowering date(FFD)to EFD.From FGP to FMD,the DTR was significantly positively correlated with yield.
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