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Since the second half of last year, under the joint pressure of increased imports and increased domestic production, domestic corn prices have weakened, farmers' enthusiasm for planting has been frustrated, and Anhui is no exception. “Improving planting income is a new challenge for China's corn production development.†At the seed industry information release and corn industry development forum held during the exhibition, Zhang Jian, director of the technology development department of China National Seeds Co., Ltd., said that China is currently Corn yields are only half that of the United States, and costs are nearly one-third higher than in the United States. 
Anhui improves planting efficiency and breaks the bottleneck of corn grain
[China Agricultural Machinery Industry News] Recently, according to China's Anhui Famous Agricultural Products and Agricultural Industrialization Trade Fair, "Dika 517" passed the introduction test of the machine collection group, indicating that the bottleneck of Anhui corn grain direct harvest is being broken.
Anhui improves planting efficiency and breaks the bottleneck of corn grain
Improve planting efficiency, grain direct harvest is the key. Zhang Jian calculated the account for the reporter: artificial harvest, field harvest plus drying, threshing and transportation costs, the cost per mu is about 430 yuan; mechanical harvesting, the cost per mu is about 220 yuan; grain direct collection plus drying, cost per acre It is only 110 yuan, only 1/2 of the mechanical harvesting and 1/4 of the artificial harvest.
Direct grain harvesting is a systematic project that requires the cooperation of varieties, machinery and agronomic techniques. The mismatch of varieties has always been the bottleneck for the promotion of grain direct harvesting technology. “The grain-receiving varieties require early maturity and fast dehydration after maturity.†Zhang Jian said that the moisture interval with low grain loss rate is 23%-25%. If the grain water content is higher than 25%, the grain is easy to break or take off. Not clean; while the grain moisture content is less than 23%, it will lead to an increase in the rate of falling.
In addition to rapid dehydration, early maturity, dwarf stalk, and dense planting are also characteristics that are required for grain harvesting. In the view of Liu Zheng, a corn breeding expert and deputy dean of the Anhui Institute of Science and Technology, the real change brought about by direct grain harvesting to corn varieties is reflected in the technical route. “In the past, high yields were achieved by single crop yields, and now it is necessary to increase production by groupsâ€.
It is understood that the requirements for the approval and introduction of varieties of Anhui Province for the direct harvesting of maize seeds are at a density of 5,000 plants per mu. The grain moisture content of the control varieties is 28% at 58 days after silking, and the water content per one point is reduced. Can reduce 2 points, but not more than 5%; under normal circumstances, the lodging rate is 3%.
Faced with such stringent standards, "Dika 517" is the only corn variety introduced this year through the introduction of the Anhui Province. According to the test results of the international species, in the case of harvesting density of 5,000 plants per mu, the yield of “Dika 517†is close to 1600 kg, which is 200 kg more than the local main planting variety; in the case of 5500 plants per mu, The card 517" per mu is stable at 1600 kg, which is 300 kg more than the local main plant.
(Original title: Anhui: corn grain directly through the breakthrough bottleneck)