How to do well the early Management of Summer Maize after sowing Autumn harvesting crops in North China

During this period, the autumn harvest crops in the north were basically sown, and corn played an important role in the autumn harvest crops in the north. As the saying goes, three minutes, seven minutes, so how to do a good job in the early management of summer corn?

Corn

First, check seedlings and replant. Due to the different soil moisture when sowing summer corn, the phenomenon of lack of seedlings and broken ridges will appear in some fields, so the method of transplanting with soil should be used to do a good job of checking and replanting maize seedlings. Generally, when maize seedlings have 3-4 leaves, strong seedlings should be selected, transplanting with soil in time after rain, and management should be strengthened after transplanting, so as to promote the normal growth of maize seedlings as soon as possible, prevent the emergence of large and small seedlings, and ensure that the seedlings are uniform.

The second is to fix the seedlings. Summer corn, seedling in 3-leaf period, 5-leaf stage, fixed seedling. If the light field is harmed by underground pests, the seedlings can be determined early, otherwise, the seedlings can be determined later. When fixing the seedlings, it is necessary to ensure a reasonable density, and leave the seedlings with leaves extending to the rows and strong seedlings with height, uniform thickness and neat thickness as far as possible, which is beneficial to ventilation and light transmission. The density of retained seedlings per mu of Zhengdan 958 is about 4500, while that of 20 mu of dredged seedlings is not less than 4000.

The third is to control insect pests. The main pest in maize seedling stage is armyworm. When pests occur after emergence, artificial capture, poison bait and chemical control should be carried out in time. General mu with 1% parathion granules 1 g per plant heart, or with 25% Kuaishaling 1500 times liquid, 20% sodipine 2000 times solution spray control.

The fourth is to apply jointing fertilizer. When the 7 leaves of maize are unfolded, the jointing fertilizer can be applied in time, which can be applied by trenching strips between rows or deep burying in interplant holes, and urea is generally used for 10 kg per mu. Weak maize seedlings should be applied early and re-applied properly.