Due to the high temperature and high humidity during the whole growing season of summer corn, corn is vulnerable to multiple pests. Therefore, it is particularly important to improve the quality of sowing and cultivate good quality seedlings to lay a solid foundation for the entire growth period. To improve the quality of sowing and ensure that corn grows robustly, the following issues should be noted during sowing:
First, choose a good variety. The varieties are mainly cooked and dense, which helps increase density and increase yield. The compact varieties include Zhengdan 958 and Yuen Yu 13.
Second, timely sowing time to harvest wheat, timely sowing corn. Strive to achieve "the same day sowing wheat on the same day," "in the morning after the receipt of wheat." It is possible to use the measures of seeding and pouring the head water first to speed up the seeding progress. Early sowing in the time of grab can prolong the growth period of corn and increase the yield significantly.
III. Appropriate Increase in Density Plant density is the basic element for constructing a high-yield population, and different regions are suitable for different varieties. Different varieties have different requirements for planting density. Choosing dense varieties and appropriately increasing density are effective ways to increase production. To achieve a variety of density, and according to their land mass adjustment, fertility to take the upper limit, on the contrary, take the lower limit. Early sowing should be diluted, late sowing should be dense, late-maturing large ear varieties should be thin, medium-early-maturing varieties should be dense. The planting density of compact and compact varieties is generally controlled at 4000-5000 plants/mu, and the high-yielding fields are at 4500-5000 plants/mu.
Fourth, scientific fertilization. According to the survey, under fertilization, single fertilization and a shelling fertilization method can not meet the demand for nutrients in the growth and development stages of summer maize, and it is one of the most important reasons for the low corn yield. The regular fertilizer requirement of corn is heavy phosphorus and potassium fertilizer in the early stage and heavy nitrogen fertilizer in the later stage. Use 40 kg of compound fertilizer with a total nutrient content of 45% or more as the base fertilizer.
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