Where is the northeast corn? Please introduce it in detail.

1. Study on Water Difference of Maize in Northeast China and North China

The moisture content of corn used by feed enterprises shall generally not exceed 16%. The post-harvest drying methods of corn in Northeast China and North China are different. Northeast China mainly relies on drying towers, while North China mainly relies on natural drying. Although the natural drying of corn in North China can be reduced to 14% or even lower, the overall drying time is longer, while corn in Northeast China can be dried in a short time. In addition, the stage of centralized grain sales in general producing areas is mostly in winter, and at this stage, the overall temperature in all parts of the country is low, the advantages of drying methods in Northeast China are more obvious, and the supply capacity of low-moisture corn is stronger than that in North China. Especially in the year when corn harvest moisture is high. For example, 201112, the overall moisture content of corn in North China is high. Although it continues to be naturally dry in winter, due to too much rain, snow and fog, corn precipitation is too slow, which directly leads to the abandonment of corn by feed enterprises in the south.

Second, the difference of corn bulk density between Northeast China and North China.

Although feed enterprises do not stipulate the bulk density limit of corn purchase, the overall requirements are generally high, so they choose the best purchase. The bulk density of northeast corn can reach second-class and above, and that of north China corn is third-class and above. From an easy point of view, the corn in North China is obviously not as good as that in Northeast China. Therefore, considering the weight index, southern feed enterprises are more inclined to purchase high bulk density corn in Northeast China, especially pig feed production enterprises.

Third, the difference of corn mildew between Northeast China and North China

The requirements of feed enterprises for corn mildew rate are mostly controlled within 2%. After harvest, corn in Northeast China is usually dried by drying tower and quickly precipitated, which limits the occurrence of corn mildew. In the process of natural drying, corn in the north is easily affected by rain and snow, which leads to slow precipitation or backwater, which leads to an increase in mildew rate. After 201112 harvest, the corn in North China deteriorated due to excessive moisture, and the overall mildew rate was high, which could not meet the acquisition requirements of feed enterprises and became the "abandoned children" of feed enterprises. Therefore, from the moldy point of view, low moldy corn in Northeast China is a safe choice for feed enterprises.

Fourthly, the difference of corn toxin between Northeast China and North China.

Although different enterprises have different requirements for different toxins, feed enterprises strictly control the overall toxin indicators, especially aflatoxin and vomitomycin. The production of toxins is related to the planting land and weather and climate factors of corn, but the moisture and mildew of corn also have great influence on the production and exponential growth of toxins. Generally speaking, the index of corn toxin in Northeast China is low, which can basically meet the purchasing needs of feed enterprises in normal years. However, the maize toxin index in North China is generally higher than that in Northeast China, showing the characteristics of high in the south and low in the north. 20112 The mildew toxin of corn in North China seriously exceeded the standard, which inhibited the enthusiasm of feed enterprises to purchase corn in North China. Therefore, from the point of view of toxin, northeast low-toxic corn is more popular with feed enterprises.

Based on the above four factors, in normal years, northeast corn is more favored by feed enterprises because of its low water content, high bulk density, less mildew and low toxin.