Analysis on the climatic factors of the main producing areas of Juglans sigillata in Yunnan province

The effects of climatic factors on geographical distribution of Juglans sigillata were analyzed based on the datas of the 11 climatic factors of 40 counties in Yunnan province. The results showed that Juglans sigillata had the higher requirement for the water and temperature. The temperature (included July average temperature, January average temperature, annual average tempearture and ≥10℃ accumulated temperature) was the basic dominant factor, the influence of temperature to the distribution of Juglans sigillata was the largest. The water (included annual rainfall and average relative humidity) was the second leading factor, the influence of water to the distribution of Juglans sigillata was the second largest.