The northern spring corn has been planted one after another, and some have been slowly growing out of the ground. How can spring corn at seedling stage prevent sudden natural disasters? According to Li Shaokun, a researcher at the Institute of Crop Science at the Chinese Academy of Agricultural Sciences and a specialist in the national corn industry technical system, the spring maize crop from the north to the new seeds matured into a corn life. Generally speaking, the number of days from the sowing to maturity of the corn is called the whole growth period. The number of days from the emergence to the maturity is called the growth period, and the length of the growth period is related to the variety characteristics and environmental conditions.
The accumulated temperature of a certain species during the whole growing period (sum of the average temperature of ≥10°C per day during the growth period) is basically stable, and the growth period will be appropriately shortened when the temperature is higher, and the growth period will be lower at a lower temperature. Properly extended. The FAO International Common Criteria divides the type of maize maturity into 8 groups. China's production is generally divided into five categories: precocious, medium-early-maturing, medium-mature, medium-late-maturing and late-maturing.
The northern spring sowing maize area starts from Bohai Bay at latitude 40, passes Shanhaiguan, passes along the Taihang Mountain of the Great Wall, passes through Taiyue Mountain and Luliang Mountain, and reaches the northern area of ​​the north of the Qinling Mountains. Including Heilongjiang, Jilin, Liaoning and Inner Mongolia, as well as parts of Shanxi, Ningxia, Hebei, northern Shaanxi, and Gansu, it is one of China's major corn producing areas.
Here's how to deal with the natural disasters and diseases encountered by the northern spring corn.
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