In the process of growth and development of corn, in addition to the three major nutrients nitrogen, phosphorus, potassium, but also boron, zinc, manganese, molybdenum and other trace elements. Although these microelements are used in small quantities, their role is irreplaceable. No matter which element is missing, it will affect the normal growth and development of corn, and it will become a limiting factor for high quality and high yield of corn. Therefore, we must pay attention to the application of micro-fertilizer production, symptomatic treatment, to ensure high yield and quality of corn. 1 Symptoms and Recovery of Zinc Deficiency Symptoms: Slow growth of plants and short internodes. Zinc is deficient in the seedling stage and early growth stage. The lower part of the new leaf appears yellowish or white. After the leaf grows, yellowish spots or greenish striped spots appear between the veins, and white spots can be seen between the midrib and the edges. The yellow tissue is broad-spectrum or necrosis, after which the leaves suddenly turn black and have a special metallic luster. The plants die after 3-5 days. During the late growth period, zinc deficiency occurs, and the silking and tasseling periods of the ear are delayed. The ear is short of seed and bald. Remedy: Spray foliar spray with 0.1%-0.2% zinc sulfate solution 2-3 times, spray 7-10 days, each time about 50kg per 667m3 spray fertilizer solution. 2 Symptoms of boron deficiency and remedy; weak young leaves do not develop and white tissue appears. The leaves are easy to wither, with white stripes between veins of the old leaves; the plants grow thin and short, the ears are deformed, the grains are arranged unevenly, shrinking, and the top grains are empty. Remedy: Foliar spray fertilizer solution 2-3 times, spray about 10 days 1 time, every time every 667m3 spray 0.2% boric acid or borax solution 50kg or so. If you choose borax, first use a small amount of warm water to dissolve it, then add fresh water and spray it in time. 3 Symptoms and remedy for manganese deficiency: The young leaves turn yellow, and the leaves appear chlorotic stripes that are parallel to the veins. The veins remain green, and the yellow stripes can expand one by one to form variegated spots, and the leaves are soft and sagging. Remedy: Foliar spraying of 0.05%-0.1% manganese sulfate solution, 5-7 days 1, even spray 2 times, each time about 667m3 spray fertilizer solution 50kg.
Reproductive And Urinary System
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