In the process of growth and development of corn, in addition to nitrogen, phosphorus and potassium, it also needs various trace elements such as boron, zinc, manganese and molybdenum. Although these trace elements are used in a small amount, their effects are irreplaceable. No matter which element is missing, it will affect the normal growth and development of corn and become a limiting factor for high quality and high yield of corn. Therefore, production must pay attention to the application of micro-fertilizer, and treat the disease to ensure high yield and quality of corn.
1 zinc deficiency symptoms and remedies
Symptoms: Plants develop slowly and the internodes become shorter. Zinc deficiency in the seedling stage and pre-growth stage, the lower part of the new leaf is light yellow or even white. After the leaf grows, there are yellowish spots or green streaks between the veins, and even white or between the midrib and the edge can be seen. The yellow tissue is broad or necrotic, and then the leaves suddenly turn black, with a special metallic luster, and the plants die after 3-5 days. Zinc deficiency in the middle and late growth stages, delayed silking and tasseling of the ear, and lack of seed baldness in the ear.
Remedy: Foliar spray 0.1%-0.2% zinc sulphate solution 2-3 times, spray 7-10 days, each time 667m3 spray fertilizer 50kg or so.
2 symptoms of boron deficiency and remedial symptoms; young leaves are weak and do not spread, white tissue appears. The leaves are easy to die, and there are white streaks between the leaves of the old leaves; the plants grow thin and thin, the ears are deformed, the grains are not aligned, shrinking, and the top grains are empty.
Remedy: Spray the boron fertilizer solution 2-3 times on the foliar surface, spray once every 10 days, and spray 0.2% boric acid or borax solution about 50kg per 667m3. If borax is used, it should be dissolved with a small amount of warm water, then diluted with water and sprayed in time.
3 symptoms of Mn deficiency and remediation Symptoms: Young leaves turn yellow, leaves appear green croaker stripes parallel to the veins, while the veins remain green, yellow stripes can expand to form variegated spots, and the leaves are soft and drooping.
Remedy: Foliar application of 0.05%-0.1% manganese sulfate solution, 5-7 days, spray 2 times, each time 667m3 spray fertilizer 50kg or so.
1 zinc deficiency symptoms and remedies
Symptoms: Plants develop slowly and the internodes become shorter. Zinc deficiency in the seedling stage and pre-growth stage, the lower part of the new leaf is light yellow or even white. After the leaf grows, there are yellowish spots or green streaks between the veins, and even white or between the midrib and the edge can be seen. The yellow tissue is broad or necrotic, and then the leaves suddenly turn black, with a special metallic luster, and the plants die after 3-5 days. Zinc deficiency in the middle and late growth stages, delayed silking and tasseling of the ear, and lack of seed baldness in the ear.
Remedy: Foliar spray 0.1%-0.2% zinc sulphate solution 2-3 times, spray 7-10 days, each time 667m3 spray fertilizer 50kg or so.
2 symptoms of boron deficiency and remedial symptoms; young leaves are weak and do not spread, white tissue appears. The leaves are easy to die, and there are white streaks between the leaves of the old leaves; the plants grow thin and thin, the ears are deformed, the grains are not aligned, shrinking, and the top grains are empty.
Remedy: Spray the boron fertilizer solution 2-3 times on the foliar surface, spray once every 10 days, and spray 0.2% boric acid or borax solution about 50kg per 667m3. If borax is used, it should be dissolved with a small amount of warm water, then diluted with water and sprayed in time.
3 symptoms of Mn deficiency and remediation Symptoms: Young leaves turn yellow, leaves appear green croaker stripes parallel to the veins, while the veins remain green, yellow stripes can expand to form variegated spots, and the leaves are soft and drooping.
Remedy: Foliar application of 0.05%-0.1% manganese sulfate solution, 5-7 days, spray 2 times, each time 667m3 spray fertilizer 50kg or so.
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