Earth-breaking (membrane) seedlings are exposed to rain during the spring drought period, and soil is easily formed on the cover soil, leading to difficulty in excavating seedlings and causing uneven seedlings or lack of seedlings. Therefore, the seedlings should be groundbreaked in time after seeding. After sowing, often to the field inspection, after the first sowing the film covered land, seedlings should be promptly broken film induced seedlings, found that film damage should be timely sealed with soil to break.
The seedlings and seedlings should be seedlings and seedlings after emergence to ensure that the seedlings grow robustly and reach the seedlings when 4-5 leaves are visible. In areas with severe underground pests, the timing of seedlings should be delayed, but no more than 6 leaves should be used at the latest. When seedlings are seedlings, sufficient seedlings should be kept according to their characteristics and requirements. Weak seedlings, diseased seedlings, insect seedlings, and deformed seedlings should be removed, and strong seedlings, uniform seedlings, and seedlings should be kept. If there is a shortage of seedlings, two plants can be left in the vicinity of each Other in the same line or in the neighboring area. Where there is a shortage of seedlings, or where the entire row is broken, it is still necessary to transplant the seedlings.
Topdressing seedlings without sowing when the application of fertilizer, seedlings can be followed by Miaofei. The role of seedling fertilizer is mainly to promote the growth and development of seedlings, especially the root system, and is essential for the cultivation of strong seedlings and high yields. Seedling fertilizer is usually applied after ditching or combined with cultivating in the cultivator to avoid surface spraying without any effective rainfall. The amount of fertilizer can be determined according to specific conditions such as soil fertility, yield level, nutrient content of fertilizer, etc. Generally, 5-10 kg of urea can be topdressed per mu, which accounts for 20%-30% of the total amount of nitrogen fertilizer. It is also possible to add a certain proportion of long-acting urea or slow-release urea. The cultivating top-dressing work implements must have good inter-row passing performance, without obvious rooting, injury, or injury.
Water management Maize plants have little water requirement at the seedling stage and can tolerate mild drought stress. Appropriate drought at the seedling stage can promote root development, promote plant growth, reduce the area of ​​heading, improve lodging resistance, and facilitate seedlings. Therefore, irrigation is not required under normal circumstances, except for insufficient seedlings at the seedling stage or when the weather is dry and needs to be filled with water in a timely manner.
When the drought is heavy at the seedling stage, where there are conditions, the water-saving irrigation technology can be used for the ditching of the seedlings. That is, after the tractor is hung opener, then the seedling side ditching water injection device is installed to complete the seedling ditching, water application, and earth covering operations once completed. With the characteristics of fast progress, low cost, water saving, labor saving, and high irrigation efficiency, the water consumption per mu is 6 tons, which can effectively solve the problem of drought and replenishment at the seedling stage.
The cultivating loose soil weeding by artificial or mechanical cultivator can loosen the soil, increase the temperature of the soil, accelerate the decomposition of organic matter, increase effective nutrients, prevent drought, protect floods and eradicate weeds. Generally 1-3 times: 4-5 leaves for cultivating grassing operations, the depth of 3.5-5 cm is appropriate; before the jointing, the second and third cultivators, the depth of 8-15 cm is appropriate, the seedlings should be shallow, Between the lines should be deep.
Due to the long-term use of small farm implements, the average arable layer in the northern spring corn zone is only 16.1 cm. The deep pine can break the plough bottom layer, improve soil permeability, improve soil water storage capacity, promote root development, and improve corn lodging resistance and drought resistance. Such comprehensive resilience, is conducive to high yield and stable production of corn. Under the condition of no deep pine in the autumn, it can be deep in spring and the depth of deep pine is generally 30-35 cm, deep loose once every 2-3 years.
Early delivery, avoiding injury Main shoots Most of the tillers at the seedling stage grow in the 3rd and 4th leafhoppers, forming lateral strains, and cannot form spikes, but grow vigorously, compete with the main spike for nutrients and moisture and shading, from the time of seedling setting to the jointing period, It is necessary to diligently check and diligently remove the childbirth from the base in time. The following conditions must be eliminated: 1. The planting density is less than 4,000 plants/mu; 2. The whole film is covered with corn, with strong growth in the early stage and more tillers.
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