Recently, some farmers have reported that after the corn seedlings grow out, the leaves are discolored, and they become purple-red and even die. What is the cause? Have you ever encountered discoloration of corn seedlings? Then do you know why it is discolored? The next small series will be aimed at the analysis and prevention of different colors of corn seedlings!
Different colors, different symptoms!
Leaf seedling turns yellow: the seedling leaves are chlorotic and then turn yellow. The usual reason is that the nursery is not strong enough; in addition, the sowing is too deep to cause normal emergence. Unreasonable close planting, soil deficiency, and imperfect seed granules are also triggers. In severe cases, the whole leaves die, which may cause empty poles or baldness.
Control measures: select high-quality seeds, germination before sowing, timely cutting seedlings and weeding, supplementing nitrogen fertilizer to promote seedling growth, finely crushing soil.
Leaf seedlings become white: more in the four-leaf period and later. The leaves are chlorotic and then gradually yellowish white. At the 5-6 leaf stage, 1-3 under the heart leaves except the veins, and the rest appear yellowish and pale green stripes. Purple streaks appear at the base. After 10-15 days, the purple color gradually turns yellow-white, and the mesophyll becomes thin and white, which is caused by zinc deficiency in the soil.
Control measures: use zinc fertilizer as seed fertilizer and fine soil to mix evenly, and sprinkle it beside the seeds when the corn is planted. Or zinc fertilizer seed dressing, foliar spray zinc fertilizer.
Leaf seedlings become purple: more often after the three-leaf period. The leaves are chlorotic and red and eventually become purple. The most obvious feature is that the leaves turn purple, the stems are small, and the growth is obviously slow. This is caused by phosphorus deficiency in the soil; in addition, low-lying water, underground pests, etc. may be caused.
Control measures: increase the application of phosphate fertilizer, intensive cultivation of flat soil, timely drainage.
Leaf seedlings turn yellow-green: the leaves are narrow, the plants are short, and the lodgings appear, and the leaves are yellow-green stripes or brown. This is due to the lack of potassium.
Control measures: rationally increase the application of potassium fertilizer.
The question about the discoloration of corn seedlings is here. Only by understanding the reasons for its different colors, it is better to prescribe the right medicine. I hope that farmers can learn from such problems when they encounter such problems!
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