1. Characteristics of Growth and Development Maize from the stage of emergence to jointing is the seedling stage. In this period, the vegetative growth is the core, the aboveground growth is relatively slow, and the root growth is rapid.
2. The main objectives of field management are to promote root growth, ensure seedlings and seedlings, and cultivate strong seedlings. The stems are oblate and short, with deep green roots, laying the foundation for production.
3. Production Management Technology
Seedlings and Dinglings: Mechanically drilled plots, after emergence and time, ensure that seedlings grow robustly. Until 4-5 leaves visible seedlings. For example, serious plots of underground pests should be settled late. No more than 6 leaves at the latest. When seedlings are seeded, sufficient seedlings should be reserved according to their characteristics and requirements. Remove weak seedlings, diseased seedlings, insect seedlings, deformed seedlings, leaving strong seedlings, seedlings, Qi Miao. If there is a shortage of seedlings, two plants can be left in the vicinity of their counterparts or neighbors.
Top-dressing Miaofei: When the seeds were sown, the base fertilizer plot was not applied, and seedlings could be topped with Miaofei. Seedling fertilizer is generally applied after ditching or 5-7 leaf stage combined with cultivating in-depth application of surface cultivation, the prohibition of surface application. The amount of fertilizer can be determined according to the soil fertility, yield level, fertilizer nutrient content, and other conditions.
Water Management: Maize seedling plants require little water and can tolerate mild drought. Moderate drought at the seedling stage can promote root development, promote plant growth, reduce the ear position, increase lodging resistance, and facilitate seedling emergence. At this time, in addition to the lack of bottom quotients at the seedling stage or the need for timely irrigation of the severe drought, no irrigation is required under normal circumstances.
Loose tillage: artificial depression and mechanical cultivator can loosen the soil, increase the temperature of the ground, accelerate the decomposition of organic matter, increase the effective nutrients, prevent drought and protect the weeds, and eradicate weeds, generally 1-3 times. When 4-5 leaves, cultivating and weeding operations. For deep-seated plots, the cultivator depth should be 3.5-5 cm, and the second and third cultivators should be used before jointing, and the depth should be 8-15 cm. Seedlings are shallow and deep between lines to prevent injury.
The following conditions must be eliminated:
1 Planting density 4000 plants/mu;
2 The mulching film covers corn planting, with strong growth in the early stage, more tillers, competition for nutrients and moisture with the main stem, and shading.
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