Abstract:

Among meteorological conditions, temperature is the main cause of mildew of farmers’ self-stored grain in Heilongjiang Province. To study the impact of temperature on self-stored grain of farmers, through real-time monitoring of the temperature in the corn and rice grain piles, and comparing the obtained temperature with that observed in the weather station, we analyzed the amplitude of the temperature of 48 h from 2011 to 2020, and drew the following conclusions. The temperature variation of the weather station was different from that of stored rice grain, the temperature amplitude of the weather station was large, while that of grain temperature was small, slowly descending in a diagonal line; the correlation between the two was not large, R was 0.821; the grain temperature variation lagged behind that of the weather station for about 14 days, and the grain temperature increased with the increase of the air temperature; according to the regression equation, when the grain temperature reached 15℃, the weather station temperature reached 30℃. The variation of the weather station temperature was consistent with that of the corn grain, the difference was small and the correlation was large, R was 0.957; the grain temperature variation lagged behind that of the weather station for about 2 h; when the grain temperature reached 15℃, according to the regression equation, the weather station temperature was 16℃. In summary, the meteorological service indexes of the temperature of farmers’ self-stored grain are: the temperature is greater than 0℃, and the anti-condensation index is the maximum (minimum) temperature rising (decreasing) for 8℃ in 48 h. The meteorological service indexes of the temperature for farmers’ self-stored grain are of great significance to accurate meteorological service for farmers’ grain storage and ensuring food security.

Key words: Heilongjiang, farmers’ self-stored grain, meteorological service, grain temperature, air temperature, temperature index