Symptoms of nutrient deficiency in Summer Maize and its targeted Control methods

The deficiency of trace elements in summer maize will show a variety of corresponding symptoms in the process of growth and development. identifying maize deficiency and scientifically applying micro-fertilizer to remedy is an important technology for high yield of maize.

Corn

First, zinc deficiency: in the maize seedling stage, the young leaves lose green and show light yellow, resulting in white seedlings. The green stripes of the leaves in the middle of the corn are obvious, and the old leaves at the bottom are grayish brown. Zinc deficiency of corn can be applied 1.5-2.0 kg zinc sulfate per mu or 0.2% Mel 0.3% zinc sulfate solution is sprayed on the leaves, which can be sprayed 3 times, each time at intervals of 5-6 days.

Second, molybdenum deficiency: the old leaves of corn lose green and turn yellow between the veins, the leaf margin is scorched, curl inward, and the grain shrinks. 0.15% Mel 0.2% ammonium molybdate solution can be sprayed on the leaves.

Third, iron deficiency: the veins of the new leaves of corn lose green and yellowing, remain green and striped obviously, and the stems and leaf sheaths of corn are purplish red. This can be foliar sprayed with 0.2% Mel 0.3% ferrous sulfate solution, and can be sprayed 3 times at intervals of 5-7 days.

Fourth, boron deficiency: the young leaves of corn can not spread and turn white, and gradually wither and die. The old leaves have white stripes between the veins, and the plants are short and thin. Can use 85 grams of borax or 50-60 grams of boric acid, mixed with 60 kilograms of water, foliar spraying, can be sprayed 3 times, each time at intervals of 5-7 days.

Fifth, manganese deficiency: starting from the new leaves, the young leaves turn yellow, there are green spots between the veins of corn leaves, the leaves are soft and drape, and the roots are slender and white. 0.2% manganese sulfate solution can be used for foliar spraying 2-3 times, each time at intervals of 7-10 days.

Sixth, copper deficiency: corn plants grow slowly, short, withered at the top and form clusters. The leaf color of corn is gray-yellow or red-yellow with white spots, and the ear development is poor. One kilogram of copper sulfate can be applied per mu or 0.2% copper sulfate solution can be sprayed on the leaves.