How to grow Spring Maize well

? I. adequate application of basic fertilizer and fine soil preparation

During soil preparation, 2000 kg of organic fertilizer is applied per mu, 30% of the total amount of nitrogen fertilizer and all phosphate and potash fertilizer are used as base fertilizer. When preparing the soil, it is necessary to meet the six-character standard of "deep, loose, broken, flat, clean and moisture". Lay a good foundation for sowing the whole seedling.

? 2. Selection of varieties

At present, the main varieties suitable for spring corn production in our city are Jinhai No. 5, Nongda 108, Danyu 86, Weiyu 308, Qingnong 105 and so on. There are Xixing Heinuo No. 1, Xixing Bainuo No. 2, Yannuo No. 6, Yannuo No. 7, Prince Charming and so on.

? 3. Seed treatment

5.4% pyridine corn seed coating agent can be used to control seedling gray planthopper, aphids, rough shrinkage disease, etc.; seed dressing and seed dressing with tebuconazole, thiram, tebuconium and other agents can reduce the occurrence of corn head smut; seed dressing with phoxim to control underground pests such as ground tiger and golden needle worm.

? Fourth, sow early in time to improve the quality of sowing.

1. Timely early sowing of soil moisture: combined with the current climatic conditions, once the conditions are suitable, strive for early sowing of soil moisture. In order to avoid the harm peak of the first generation of gray planthopper, strive to finish sowing before the end of April.

2. Appropriate sowing: the sowing rate is generally 2.5 kg / mu, increasing or decreasing according to the characteristics of the variety.

3. Sowing specifications: the sowing depth of corn should be the same, the sowing depth should be 3mur5cm, and the row spacing should be 60mur70cm.

? 5. Balanced fertilization

According to the yield index and soil fertility basis, the fertilizer application rate was determined according to the application of nitrogen (N) 3 kg, phosphorus (P2O5) 1 kg, potassium (K2O) 2 kg per 100kg grain, and zinc sulfate increased by 1 kg per mu in zinc deficient plots. Topdressing can be carried out in two stages, that is, re-applying panicle fertilizer and topdressing flower and grain fertilizer.

? VI. Reasonable close planting

Reasonable close planting should be carried out according to the characteristics of varieties and yield indexes. For example, the remaining seedling density of Danyu 86, Qingnong 105, Weiyu 308 and Jinhai 5 were controlled at 3500, 3700, 4000,4500 and 4200,4500 per mu, respectively.

? VII. Strengthen the integrated prevention and control of diseases, pests and weeds

According to the principle of "prevention first, comprehensive control", the combination of agricultural control, biological control, physical control and chemical control should be carried out, and the use of pesticides should meet the requirements of non-pollution.

1. Weed control: choose herbicides before or after corn seedlings to carry out chemical weeding. When the soil moisture is good after sowing, you can spray 40% Yi A mixture 200ml / mu, or 33% dimethamyl EC 100ml plus 72% Durol EC 75ml plus 50 liter water for closed spray; when the moisture is poor, corn seedlings 3-5 leaves, weeds 2UV 5 leaves spray 4% Yunongle suspension 100ml / mu.

2. Diseases: in recent years, maize rough dwarf disease occurred in a large area in our city, which seriously affected the yield of spring corn, which should be paid great attention to, and the following measures should be taken to prevent it.

Selection of disease-resistant varieties for ①

At present, there is a lack of improved varieties with strong disease resistance in maize production, but there are still some differences in the degree of disease susceptibility among varieties. Such as Nongda 108, Jinhai 5, etc., are more resistant to maize rough dwarf disease.

② adjusts sowing date

The safe sowing time should be selected to avoid the susceptible leaf age of maize. Spring corn sowing should ensure that the leaf age of gray planthopper reached more than 7 leaves before a large number of gray planthopper migrated and spread in late May, so that the occurrence peak of gray planthopper was staggered in maize seedling stage.

③ removes weeds

Timely remove the weeds in and around the corn field, control the source of poison, eliminate the overwintering and breeding places of gray planthopper, and reduce the chance of virus transmission.

④ strengthens field management

Properly increase the sowing rate and set the seedlings late, usually after 6 Mel and 7 leaves. Once the partial infection is combined with the seedling, the diseased plants in the field are removed and concentrated treatment. Rational fertilization and increased application of organic fertilizer and phosphorus and potassium fertilizer can promote the healthy growth of maize and enhance the ability of disease resistance.