Geographical environment of Youxi county

Youxi County is located in the south of 26 degrees north latitude, about 100 km from the sea to the east, with a subtropical monsoon humid climate. It is warm and hot in summer, cool in winter, rainy in spring and summer, and abundant in precipitation.

February-May is spring, June-August is summer, September-165438+10 is autumn, 12-65438+ 10 is winter. Due to the disparity in altitude, the beginning and duration of each season are very different. The annual average temperature in Youxi County is 19.2℃. The lowest year is 18.6℃ and the highest year is 20.2℃( 1998, the highest annual average temperature in this county). The annual variation of temperature is single peak, with the coldest in June being 5438+ 10, and the monthly average temperature being 8.0 ~ 12.0℃, and the hottest in July, with the monthly average temperature being 26.6 ~ 28.9℃. The extreme maximum temperature is 40.3℃ (1July 29th, 992) and the extreme minimum temperature is-7.8℃ (1February 23rd, 999, the lowest temperature in this county). The daily maximum temperature ≥35℃ and the daily maximum temperature ≥ 38℃ are 45 days and 6 days respectively. The daily variation of temperature is generally the lowest in the morning (5 ~ 7 o'clock) and the highest in the afternoon (14 ~ 16 o'clock). Due to the complex terrain in the county, the temperature distribution varies greatly from place to place. When the altitude rises 100 m, the temperature in the middle and high altitude areas drops by 0.5 ~ 0.6℃.

Youxi county has a warm and humid climate. Although there are four distinct seasons throughout the year, the winter frost period is short, the soil is fertile, the forest coverage rate is high, and the water resources are abundant, which has a good environment for large-scale agricultural production. Youxi County, with a forest coverage rate as high as 64%, is a famous timber production county in China. Because of the variety of wood and the large area of broad-leaved forest, it creates a superior environment for the reproduction and growth of various fungi, especially edible fungi, and also creates good conditions for the artificial cultivation of edible fungi. There are more than 30 kinds of wild and artificially cultivated edible fungi in the county. With the continuous improvement of production conditions and market environment, the output of edible fungi has also increased year by year.