Planting corn growth period management
Seedling management
1 The primary task of field management of seedlings, seedlings, and film-mulching corn is to release seedlings in a timely manner. The seedlings should be kept away from sunny days at noon and windy weather. There is a certain space for seedlings to plant seedlings under the membrane and can be treated with 3- to 4-chips. When the seedlings are released, guard against hot sprouts. At the time of the three-leaf clover and seedlings, when the seedlings are planted with five leaves and one heart, the seedlings, weak seedlings, young seedlings, leggy seedlings, and deformed seedlings are removed from the seedlings to ensure that the seedlings are maintained at a height of 4500--5000 strains per mu. The Baoding 1000--1200 strains.
2 In addition to seedlings and seedlings, weeds are to be sowed at the seedling stage. For the male parents planted in the ditch, cultivators are to be cultivated. In order to ensure that the seedlings are neat and consistent, the seedlings are controlled at a height of 15-25 cm and watered to conduct the seedlings to promote the root system. Under the hole, improve the water absorption of seedlings, drought resistance.
3 Prevention and control of diseases and pests at the seedling stage should be controlled according to the parents' disease resistance. The main maize disease in Gansu is smut, smut, which can be sprayed with 1% Bordeaux mixture once every 7 days. It is also necessary to prevent the underground tigers, earthworms and other underground pests from taking the principle of comprehensive prevention and prevention as the main principle.
4 Water and Fertilizer Management Seedling corn requires not too strict water and fertilizer requirements. If the source of fertilizer is adequate, it is generally not top-dressing, but it is necessary to strengthen the water and fertilizer management for the seedlings with weak growth potential, and partial fertilizer and partial water are used to ensure consistent growth before jointing. .
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