High-yield planting techniques of maize

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1. Reasonable and suitable planting density

Grain crops have always seen the agricultural proverb of seven-point harvest of seedlings. Choosing a reasonable density is one of the prerequisites for high yield. Spring sowing and summer sowing have different density choices!

Spring sowing: during the whole growth period, due to the long drought period, it is appropriate to select the varieties with high density in the middle ear, the density per mu is about 4800 to 5200 plants, the fixed pattern is equal row spacing of 60 cm, plant spacing of 7 to 8 inches, and the plant height decreases naturally due to the longer drought period. this planting density can give full play to the advantages of individual plant and population.

Summer sowing: due to the decrease of temperature in the short and late growth period, it is appropriate to use large panicle and sparse planting varieties in variety selection, with a density of about 3800 to 4200 plants per mu, that is, a bag of seeds per mu of land.

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Second, the use and amount of chemical fertilizer

Spring sowing corn is recommended to use equal content chemical fertilizer (15-15-15 or 17-17-17). If you use high nitrogen fertilizer without topdressing in the middle stage, it will often lead to maize de-fertilization and grain dissatisfaction in the later stage, and the amount of fertilizer per mu is about 100 jin.

Summer sowing corn is mainly high nitrogen fertilizer to promote early seedling development and strong seedlings, with a dosage of about 80 jin per mu.