The accumulated temperature of xinruipu 826 corn seeds is 2200-2500 degrees. The growth period of Xinruipu 826 maize seeds is 95- 100 days, and the effective accumulated temperature is 2500-2700℃. The accumulated temperature of corn is between 200 and 2500 degrees. Accumulated temperature is the sum of daily average temperature in a certain period, and it is an index to study the heat demand of plant growth and development and evaluate heat resources.