Liu Xiangdong is a professor at the China Agricultural University and vice president of the Drying Equipment Branch of China General Machinery Industry Association. Years of scientific research, teaching, and social investigations have made him an expert in drying machinery and has become one of the most concerned about the development of grain drying mechanization. In the process of being interviewed by reporters, "immediate urgency" became his most concentrated thought.
The significance is unquestionable Drying is a key part of the food production process and an important part of achieving full mechanization of food production. According to Liu Xiangdong’s introduction, China is the world’s largest food producer and consumer, with an annual total grain output of approximately 500 million tons. Statistics show that the loss of grain during grain threshing, drying, storage and transportation after grain harvesting in China is as high as 15%, far exceeding the 5% standard set by the UN Food and Agriculture Organization. Among these losses, each year, due to the humid climate, the wet valleys have no time to dry or reach safe moisture. The loss of grain caused by mildew, germination and other losses is up to 5%. If the annual output is 500 million tons of grain, it is equivalent to 25 million tons of loss per year. food. If you eat 0.5 kg of food per person per day, 25 million tons will be consumed by 68,000 people a year.
In this regard, Liu Xiangdong’s opinion is: “This figure is staggering. Therefore, the development of grain drying mechanization technology, changing the passive situation of traditional food depend on heaven, and reducing grain losses to the lowest point are important guarantee conditions for high yield and harvest of grain. It has become an urgent task."
In addition to effectively preventing the damage caused by severe weather such as continuous rain and rain, grain drying mechanization also has other obvious advantages: lighter labor intensity, improved working conditions, higher labor productivity, and provision of agricultural industrialization, intensification, and modernization Effective means: Improve food quality, storage and processing; prevent pollution caused by natural drying on food, and eliminate road traffic accidents caused by farmers drying up on highways.
After many years of slow development According to Liu Xiangdong, the development of grain drying machinery in China began with the imitation of dryers from Japan, the Soviet Union, and other foreign countries. Because of its complex structure, high consumption of steel, and high cost, it is not suitable for the rural economic and institutional conditions at that time. It is only used in large-scale farms and grain stores. In the 1970s, Guangdong Institute of Agricultural Machinery and other scientific research units began to research and develop small and medium-sized drying models suitable for China's national conditions, and successfully developed a direct-heated 5H-0.5 type stacking dryer. After the 1980s, in order to meet the needs of China's rural economic system reforms, the development of drying machinery has become more and more versatile and miniaturized. In 1981, Nanjing Agricultural Mechanization Department of the Ministry of Agriculture organized the production comparison test of 13 types of grain dryers in the country and initially recommended a batch of models.
The significance is unquestionable Drying is a key part of the food production process and an important part of achieving full mechanization of food production. According to Liu Xiangdong’s introduction, China is the world’s largest food producer and consumer, with an annual total grain output of approximately 500 million tons. Statistics show that the loss of grain during grain threshing, drying, storage and transportation after grain harvesting in China is as high as 15%, far exceeding the 5% standard set by the UN Food and Agriculture Organization. Among these losses, each year, due to the humid climate, the wet valleys have no time to dry or reach safe moisture. The loss of grain caused by mildew, germination and other losses is up to 5%. If the annual output is 500 million tons of grain, it is equivalent to 25 million tons of loss per year. food. If you eat 0.5 kg of food per person per day, 25 million tons will be consumed by 68,000 people a year.
In this regard, Liu Xiangdong’s opinion is: “This figure is staggering. Therefore, the development of grain drying mechanization technology, changing the passive situation of traditional food depend on heaven, and reducing grain losses to the lowest point are important guarantee conditions for high yield and harvest of grain. It has become an urgent task."
In addition to effectively preventing the damage caused by severe weather such as continuous rain and rain, grain drying mechanization also has other obvious advantages: lighter labor intensity, improved working conditions, higher labor productivity, and provision of agricultural industrialization, intensification, and modernization Effective means: Improve food quality, storage and processing; prevent pollution caused by natural drying on food, and eliminate road traffic accidents caused by farmers drying up on highways.
After many years of slow development According to Liu Xiangdong, the development of grain drying machinery in China began with the imitation of dryers from Japan, the Soviet Union, and other foreign countries. Because of its complex structure, high consumption of steel, and high cost, it is not suitable for the rural economic and institutional conditions at that time. It is only used in large-scale farms and grain stores. In the 1970s, Guangdong Institute of Agricultural Machinery and other scientific research units began to research and develop small and medium-sized drying models suitable for China's national conditions, and successfully developed a direct-heated 5H-0.5 type stacking dryer. After the 1980s, in order to meet the needs of China's rural economic system reforms, the development of drying machinery has become more and more versatile and miniaturized. In 1981, Nanjing Agricultural Mechanization Department of the Ministry of Agriculture organized the production comparison test of 13 types of grain dryers in the country and initially recommended a batch of models.