Maize seedling management needs "early management coarse early method"

Corn is sown to jointing stage as seedling stage. Mainly long root growth, stem segment differentiation, growth center for the root system. The seedlings are warm, more resistant to drought, more afraid of earthworms, and the fields are more afraid of seedling shortages and grass shortages. The soil should be loose. Field management should be based on "early management of early-onset," to prevent the emergence of "old seedlings" to reach the root, strong seedlings, seedlings early, adequate, homogeneous, strong purpose. The main measures are:

1, set the seedlings in the morning. Should be seedlings during the three-leaf period, four-leaf stage seedlings. When the seedlings are to be seedlings, they must go to seedlings, weak seedlings, diseased seedlings, and hybrid seedlings, leaving the same strong seedlings. In the severely irrigated section, the two plants with the same growth can be left to ensure the density.

2, weeding weeding. After the emergence of corn, timely cultivating loose soil to loosen the soil, eliminate weeds and promote deep rooting. The cultivating frequency is 2 to 3 times. The cultivator has a deep understanding of the principle of shallow seedlings and deep rows. The first cultivator was carried out before the seedlings, with a depth of 3 to 5 cm. The second and third cultivators are conducted before jointing, and the depth is preferably 8 to 10 cm.

3, top-dressing watering. Top dressing is usually done after seedling till jointing. The fertilization has the role of promoting roots, strong seedlings, and promoting strong stalks, laying a good foundation for panicles and ears. If you don't have enough fertilizer, you have to chase it early. To apply partial fat to thin seedlings and promote early onset of seedlings. The water consumption of maize during the seedling stage accounted for 31.8% of the water consumption during the whole growth period, and the relative soil relative water content was about 65%. The number of watering in the seedling stage can be controlled between 1 and 2 times, and watering must not be performed when watering. The irrigation volume is about 667 square meters and about 60 cubic meters. Seedlings in the seedling stage should be digging trenches in time for drainage, lifting the waterlogging, and timely cultivating in order to return seedlings.

4, prevention and treatment of pests. Maize seedling pests are mainly armyworm and thrips, and control of armyworm can be sprayed with 50% phoxim emulsion 3000 times solution. Thrips were diluted 1500-fold with 40% dimethoate emulsion or 50% dichlorvos emulsion. Spraying dimethoate and pyrethroid pesticides can also kill aphids, such as hoppers and other poisonous insects, and play a role in preventing the occurrence of viral diseases.

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