What is the accumulated temperature in Meris District, Qiqihar City, Heilongjiang Province?

The active accumulated temperature is between 2500 and 2700℃.

Meilisi Daur ethnic area is the north gate of Qiqihar, which is located at123 45 ′ east longitude and 4715 ′ north latitude. It is bordered by gannan county in the north, Longjiang County in the west and Fulaerji in the south. The total area is 2078 square kilometers.

Meris has a temperate continental monsoon climate, with an average annual temperature of 3.2℃ and long sunshine hours, with an average annual sunshine of 64% and sunshine hours of 286 1.9 hours. Frost-free period 136 days, located in the second accumulated temperature zone of Heilongjiang Province.

The active accumulated temperature of the second accumulated temperature zone in Heilongjiang Province is between 2500 and 2700℃. Including Bayan, Hulan, Wuchang, Mulan, Fangzheng and Suihua, Qing 'an, Lanxi, Cyclobalanopsis and Anda in the east, Daqing in the south, Qiqihar, Lin Dian, Fuyu, Gannan, Longjiang, Mudanjiang, Hailin and Ning 'an in the north, Hengshan District, Chengzihe District, Mishan, 857 Farm and Xingkai Lake Farm in Jixi City.

There are two kinds of accumulated temperature, namely active accumulated temperature and effective accumulated temperature. Every crop has a biological lower limit temperature for growth and development (for example, the biological lower limit temperature of corn is 10℃). When the lower limit temperature is lowered, crops will stop growing but not necessarily die. When the temperature is higher than the lower limit, crops can grow and develop. The daily average temperature higher than the biological lower limit temperature is called the active temperature, and the sum of the active temperatures in a certain growth period or all growth periods of crops is called the active accumulated temperature in a certain growth period or all growth periods of crops.

The effective accumulated temperature is relatively stable, which can more accurately reflect the requirements of crops for heat. Therefore, it is best to use effective accumulated temperature in phenological prediction. However, it is more convenient to use the active accumulated temperature (usually considered as the lower limit of 10℃) when it is applied to heat identification, rational arrangement of crop layout and agricultural climate zoning in a certain area.