For high yields of corn, field management is the key. Maize is a gramineous crop. The seedling stage is the stage from corn emergence to jointing, and the summer corn usually experiences 20-25 days.
1. Growth characteristics of seedling corn: Stem and leaf growth is slow, and root development is rapid. The central task of field management is to promote the growth of roots and nurture strong seedlings to meet the requirements of “four seedlings†that are early seedlings, seedlings, seedlings, and seedlings, and lay a solid foundation for corn growth.
2, management measures: early check seedlings, make up seedlings. After the emergence of corn, early check seedlings, emergence of seedlings and ridges, timely replanting transplanting, transplanting when selecting large seedlings, in the evening or cloudy afternoon with soil transplanting, watering after planting, survival after applying a small amount of fast-acting fertilizer , And carry loose soil to promote seedling growth.
3, 3 leaves 5-7 leaves Dingmiao. The thinning is usually carried out on 3-4 leaves. After the three-leaf stage, corn absorbs nutrients from the roots and the leaves absorb sunlight to produce more nutrients for seedling growth. If the seedling period is overcrowded, competing for water and fertilizer, affecting photosynthesis, is not conducive to strong seedlings. 6 to 7 leaves of Dingmiao, when Dingmiao remove small seedlings, weak seedlings, yellow seedlings, diseased seedlings, insect seedlings, mixed seedlings, too large seedlings, leave the seedlings near the nearest two plants, improve the uniformity of corn, keep seedlings uniform, strong seedlings , neat and consistent. Avoid setting seedlings too late, but also consume nutrients.
4, safe weeding: postemergence herbicides in the corn 3 to 5 leaf stage, weeds 2 to 4 leaf stage use. The herbicide should be applied after 8 to 10 leaves of corn. The spray should be strictly as required. The directional sprayer should be close to the ground and sprayed line by line. Do not spray on the corn leaf, nor can it hit the corn leaf. And to avoid the hot weather, the spraying effect is best before 9 o'clock in the morning or after 5 o'clock in the windless days. Do not re-spray, no leakage.
The maize seedling weather is dry and does not require watering, which helps to resist lodging later.
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