Cultivation techniques and measures for High yield of Maize

Select the land: the land with flat topography, deep soil layer and loose texture should be selected. Seed selection: it is not suitable to choose the seeds of the next year. Base fertilizer: farm manure, common calcium, urea, potash fertilizer and zinc fertilizer were applied to the field once. Sowing: from February to March, the sowing density is about 4500-5500 plants per mu. Topdressing: 20 jin of urea can be applied per mu at seedling stage, and 80 jin of urea can be applied about 60 days after sowing. Seedling stage management: and time seedling replenishment.

First, select land parcels

Choose to plant in the land with flat terrain, deep soil layer, loose texture and good permeability, so as to harvest higher yield.

Second, select improved varieties

At present, all the corn planted are hybrid seeds, which are popularly planted in one year, so no seeds can be left. Hybrid seeds mainly make use of the advantages of varieties to improve the quality, yield, disease resistance and stress resistance of maize. Therefore, when selecting seeds, do not choose seeds of other years, the germination rate of such seeds is relatively low.

Third, apply sufficient base fertilizer

The base fertilizer is mainly combined with farm manure, common calcium, urea, potash fertilizer and zinc fertilizer, with 2000-3000 jin of farm fertilizer, 60 jin of common calcium, 12 jin of urea and 4 jin of zinc fertilizer.

4. Early application of seedling fertilizer

When the leaves of the seedlings are 6-7, 20 jin of urea can be applied evenly next to the maize plant. The urea should be 3-4cm away from the plant and can not be applied directly on the plant. It is suitable to apply fertilizer in sunny weather. If the climate is too dry, it can be watered while topdressing.

5. Heavy application of jointing fertilizer

Fertilization can be carried out about 60 days after sowing, that is, when the number of leaves of corn is 11-12, 80 jin of urea can be applied, and after applying base fertilizer and seedling fertilizer, the remaining potassium fertilizer can also be applied, and the method of fertilization is the same as that of topdressing seedling fertilizer. it is necessary to apply fertilizer in the way of circular application, and watering can be carried out according to the soil conditions during the period.

6. Sowing seeds at the right time

Corn usually begins to sow in mid-late February and almost finished at the end of March, and the temperature during this period is also stable at 10-12 ℃, so it is still very suitable for sowing corn.

7. Reasonable close planting

The suitable sowing density per mu is about 4500-5500 plants. If the density is too low or too high, it will affect the yield of maize. Corn can be sown in double rows, mainly with 1.2m soil moisture, and the plant spacing is about 25-30cm.

VIII.Seedling management

1. Management: it is mainly to check and replenish seedlings and fix seedlings between seedlings. After emergence, maize seedlings should be checked and replenished in time, mainly in order to avoid mutual crowding among seedlings, competing for glory and fertilizer, and wasting nutrients and water.

2. Seedling replenishment: the transplanted seedlings need to retain 3 leaves. If the transplanted seedlings are too large, the survival rate will be low, and water and fertilizer should be applied once after the seedlings are replenished.

3. Interseedling: when the corn grows to 3-4 leaves, the seedlings should be kept sparse, small and large, and the diseased plants should remain strong and strong. Generally, when the number of leaves is 4-5 leaves, the seedlings of all fields can be determined.

IX. Control of diseases and insect pests

The main pest at the seedling stage is the ground tiger, which will bite off the roots and stems of the seedlings, resulting in plant death, lack of ponds and ridges. During this period, 50% Batan wettable powder can be used to stir the fried rice bran or wheat bran, the proportion is 1:50, and then sprinkle it on the corn field to trap and kill the larvae.

X. ploughing management

The middle ploughing management of maize can be carried out with topdressing at seedling stage and jointing stage, small soil cultivation can be carried out with topdressing when corn grows to 6.5-7 leaves, and large soil cultivation can be carried out with topdressing fertilizer when corn grows to 11-12 leaves.