Study on temporal and spatial characteristics of oil content and planting divisions of Camellia oleifera based on climate factors

Based on the average temperature and precipitation in September of climate data in 1980 s and scenarios data in 2050 s and 2070 s in Hunan, Jiangxi, Zhejiang and Fujian Province, the oil content distributions of three periods are obtained according to the climate resource model of oil content of Camellia oleifera, which are divided into three categories: low, medium and high level. Subtracting the oil content of the three periods in order, we can get the oil content rise and fall distribution in the two transition periods of 1980 s—2050 s and 2050 s—2070 s, and divide them into three categories: decrease, stable and increase level. The climate suitability for the growth of Camellia oleifera is superimposed with the oil content to obtain the climate suitability zone for planting Camellia oleifera, which is divided into 5 categories from high to low into categories Ⅰ to Ⅴ, and 9 sub-categories. The results are as follows: ① The oil content distribution of Camellia oleifera is high in Zhejiang and Fujian Province and low in Hunan Province. Most areas of the four provinces are covered with medium or high oil content, and the largest proportion in the three periods is medium level, reaching 41.56% ～ 45.43%. The change in oil content generally shows an increase in Fujian or Zhejiang of the east and a decrease in the fluctuation in Hunan of the west over time. The category with the largest percentage of the area in the two transitional periods is first the stable and then decrease, 50.87% and 47.36% respectively, and the smallest is the increase level. ② The climate suitability for Camellia oleifera planting is generally higher, and the regional distribution is higher in Zhejiang and Fujian, especially in the 2050 s and 2070 s, the proportion of Ⅰ level is high, and Hunan is low. There are differences in the suitability of different periods and the number of cities, the proportions of Ⅰ and Ⅱ level are relatively large in the three periods, the area proportions are 55.85%, 73.04%, and 73.14%, and the number of cities is 53.33%, 77.78%, and 75.56%. ③ By comparing related research of oil content and planting divisions of Camellia oleifera, it can be seen that the temporal and spatial characteristics of the oil content of Camellia oleifera in this study is similar to the previous results. The method of combining the climate factors with the oil content to receive planting climate divisions of Camellia oleifera is simple in calculation and easy to popularize.