What should be noted in summer corn seedling stage management?
What should be noted for summer corn seedlings? Here is an introduction. The following points should be noted for summer corn seedlings: 1. Check seedlings and fill gaps to prevent missing seedlings and broken rows. To ensure a full stand, check seedlings and fill gaps in time. After sprouting early-maturing varieties, replant, or before the seedlings reach the 4-5 leaf stage, transplant seedlings with soil in the afternoon or on cloudy days. When corn has 3-4 leaves, thin...
What should be noted for summer corn seedlings? Here is an introduction.
The following points should be noted for summer corn seedlings:
I. Check seedlings and fill gaps to prevent missing seedlings and broken rows
To ensure a full stand, check seedlings and fill gaps in time. After sprouting early-maturing varieties, replant, or before the seedlings reach the 4-5 leaf stage, transplant seedlings with soil in the afternoon or on cloudy days. When corn has 3-4 leaves, thin seedlings in time; when it has 5-6 leaves, set the seedlings. Pull out weak seedlings, small seedlings, diseased seedlings, and round-stalk seedlings, and select and keep healthy seedlings of uniform size.
II. Cultivate in time to prevent weed infestation
During the seedling stage, cultivation and weeding should be done 2-3 times. Before setting seedlings, cultivation should be shallow, with a depth of 5 cm as appropriate. Before jointing, cultivate to kill weeds 1-2 times to promote deep rooting of secondary roots, with a depth of 10 cm, deeper between rows and shallower near the seedlings. Chemical weeding is encouraged.
III. Check for diseases and control insects to prevent disease and pest damage
Promptly clear weeds at field edges, ridge edges, and field corners to eliminate aphids and planthoppers. Corn thrips damage the corn whorl in mid-to-late June, causing the whorl to twist. Damaged leaves show silvery-white streaks, and in severe cases the whorl turns yellow and dies. Control should be carried out in time.
IV. Apply extra fertilizer to weak seedlings to prevent the strong from suppressing the weak
For weak seedlings, measures should be taken early, managing individual plants to promote weak ones into strong ones so they quickly catch up to the general plant height, preventing severe shading later that causes empty stalks or small ears with bald tips and missing kernels. A common method is to apply extra fertilizer, applying 5-10 kg of quick-acting nitrogen fertilizer per 667 sq m, placed in holes near the plants, and loosening the soil in time after application.
V. Combine drainage and irrigation to prevent waterlogging
A notable feature of the corn seedling stage is tolerance to drought and vulnerability to waterlogging. As long as there is no severe drought, watering is generally not needed, but in case of waterlogging, drainage should be timely. During the corn seedling stage, there are often heavy rains and sudden rains. After rain, drainage should be timely to prevent hot rain from damaging stems, leaves, and roots and causing seedling death. This is especially true for low-lying fields and fields with poor land preparation, which should be drained even more promptly. Cultivate in time to disperse soil moisture and ventilate, preventing waterlogging.
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