Detailed Explanation of Key Points for High-Yield Corn Planting Techniques

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I. Reasonable and Appropriate Planting Density

Grain crops have long had the farming saying that seven-tenths of the harvest is decided once the seedlings appear. Choosing a reasonable density is one of the prerequisites for high yield. Spring sowing and summer sowing require different density choices!

Spring sowing: Because the entire growth period experiences a relatively long drought, it is advisable to choose medium-ear, density-tolerant varieties. The density per mu should be controlled at around 4,800 to 5,200 plants, with a fixed pattern of 60 cm equal row spacing and 7 to 8 cun plant spacing. Due to the longer drought period, plant height naturally decreases, and this planting density can give full play to both individual plant and population advantages.

Summer sowing: Because the growth period is short and temperatures drop later, it is advisable to choose large-ear, sparse-planting varieties. The density per mu should be around 3,800 to 4,200 plants, that is, one bag of seed for one mu of land.

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II. Use and Amount of Chemical Fertilizer

For spring-sown corn, it is recommended to use fertilizers with equal nutrient content (15-15-15 or 17-17-17). If high-nitrogen fertilizer is used without mid-season topdressing, it often causes fertilizer deficiency in the later stage of corn growth and poorly filled kernels. The amount per mu should be around 100 jin.

For summer-sown corn, high-nitrogen fertilizer should be the main type to promote early seedling development and strong seedlings. The amount per mu should be around 80 jin.