Corn wide and narrow row cultivation technology is applied to large and medium-sized agricultural machinery operations, ridges are changed to flat, uniform ridges are changed to wide and narrow rows, three shovels and three rakes are changed to one deep loose, and the next year rotation is planted alternately and alternately. The wide and narrow rows of corn were cultivated by changing the current ridge (60-65 cm) to a width of 80 cm and a narrow row of 40 cm. The prominent characteristics of wide and narrow rows of corn cultivation techniques are that the ridges and ridges are sideways, the trees and trees are the tops, and have good ventilation and photosynthesis, and are suitable for high density plants. There are several issues to be aware of in production applications: 1, pay attention to select the dense varieties, to increase the density when sowing. 2, the combination of base fertilizer, mouth fat and topdressing fertilizer, deep application of base fertilizer, combined with deep pine for top dressing before jointing in corn. 3, using mechanized precision (encryption) sowing. 4. If severe drought occurs in mid-growth period, it is not suitable to perform deep loosening operation. At this time, deep loosening will aggravate drought; deep loosening period should be appropriately delayed. 5. It is not appropriate to use this planting mode because it is unfavorable for raising the temperature. Vitamins are a type of trace organic substances that humans and animals must obtain from food in order to maintain normal physiological functions. In terms of physiological functions, vitamins are neither a raw material for tissues nor a substance for supplying energy, but they are an indispensable substance for the body. It has many types and different chemical structures. Most of them are the components of the coenzyme (or prosthetic group) of certain enzymes. They are the indispensable compounds for maintaining the normal growth (growth, health, reproduction and production function) of the body. It plays a catalytic role in the body to promote the synthesis and degradation of major nutrients (proteins, fats, carbohydrates, etc.), thereby controlling metabolism. Vitamins are essentially low-molecular organic compounds. They cannot be synthesized in the body, or the amount synthesized is difficult to meet the needs of the body, so they must be supplied from the outside. The daily requirement of vitamins is very small (usually measured in milligrams or micrograms). They are neither a raw material for body tissues nor a substance for energy supply in the body. However, they do not regulate material metabolism, promote growth and development, and maintain physiological functions. Vitamin K2 MK-7, Vitamin C, Vitamin E, Vitamin K2, Vitamin H, Vitamin D3 Xi'an Gawen Biotechnology Co., Ltd , https://www.ahualynbios.com