The total annual amount of radiation in the 38 × 108 ~ 54 × 108 J / m 2, all year ≥ 10 ℃ accumulated temperature ≥ 10 ° C continuous days between 4250 ~ 8000 ℃, about 220 to 350 days.
Annual total amount of radiation 38x108~54x108 Joule/square meter, temperature between 4250~8000℃ ≥ 10 ° c all year round, ≥ 10 ° c the duration in days, 220-350 days.