Corn, also known as maize, corn, baugu, Baomi, and millet, has poor root development and low fertilizer absorption rate in the absence of phosphorus; slow growth of plants in the absence of potassium, short stems, short internodes; zinc deficiency When the seedlings produce white seedlings, the veins produce white spots, the plants are dwarfed, the internodes become shorter, the leaves are dry and even die, and so on. Next, the small series will elaborate on the performance of the corn deficiency and the planting precautions.
First, the relationship between corn growth and environmental conditions
1, temperature
Corn is a warm crop, so the growth temperature is required to be above 10 degrees.
2, lighting
Early maturing maize varieties are not very sensitive to light response, while late maturity varieties are sensitive to light response.
3, moisture
In the process of corn planting, the water requirement is relatively high. Generally, a corn plant consumes 150-200 kg of water in its lifetime.
4, soil and nutrients
Maize plants have strong adaptability and low pH requirements for soil. Therefore, in the process of planting corn, soil with deep soil, high organic matter content, good soil structure and pH between 6 and 7 should be selected.
Second, the lack of corn performance
1. Phosphorus deficiency at seedling stage
(1) The root system is poorly developed and the fertilizer absorption rate is low.
(2) The leaves of corn plants will appear purple-red, the leaves will curl and the stems will be purple.
(3) In the mid-term lack of phosphorus, the leaves are delayed, the fertilization is poor, and the deformed ears are prone to occur.
(4) Phosphorus deficiency in the late stage, the ear is matured late, and the grain is not full.
2. Potassium deficiency at seedling stage
(1) The leaves of the plants are yellow or yellowish brown, and the edges of the leaves are dry.
(2) The plants grow slowly, the stems are short, and the internodes become shorter.
(3) When the potassium deficiency is serious, the tip of the leaf is burnt and gradually dark brown-red.
(4) The growth of old plants is stagnant, the veins turn yellow, the internodes are shortened, the roots are small, and it is easy to fall.
(5) The ears appear bald, the grains are small, the starch content is low, and the quality is poor.
3. Zinc deficiency during seedling stage
(1) The seedlings produce white seedlings, the veins produce white spots, the plants are dwarfed, the internodes become shorter, and the leaves are dry and even die.
(2) Zinc deficiency in the middle stage, yellow and green stripes appear in the middle and lower leaves of the plant, resembling mosaics.
(3) The late leaves are in the form of mosaics from the bottom to the top, and the development is blocked.
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