Summer corn is not used because of the intercropping and rushing live in the wheat field. The base fertilizer is not applied, and the amount of fertilizer is also insufficient. Therefore, reasonable topdressing is essential.
First, select the corresponding topdressing program corn to form a certain yield, need to absorb the corresponding nutrients from the soil and fertilizer, the higher the yield, the more fertilizer needed, it is necessary to select the appropriate topdressing plan according to the yield level and soil conditions. There are 3 types of topdressing options available. High-yield fields, good ground strength, and a large number of top dressings. It is best to use topdressing methods such as light-seeking seedling fertilizer, heavy-chasing ear-fertilizer and compensatory grain-removing fertilizer: the amount of seedling fertilizer accounts for 30% of the total topdressing fertilizer, and the ear fertilizer accounts for about 50%. About 20%. Medium-yield fields, good fertility base, and a large number of top dressings. It is advisable to use the second-strength fertilization method of applying sufficient seedling fertilizer and heavy-seeking fertilizer: about 40% of seedling fertilizer and 60% of ear fertilizer. Low-yield fields, poor soil foundation, and small amount of topdressing should be used for topdressing methods of heavy-seeding seedlings and light-chasing ear fertilizers: about 60% for seedlings and about 40% for panicles.
Second, the good time for topdressing depends on the fertilizer requirement of corn for a lifetime, and the topdressing in the best fertilization period can fully exert the fertilizer effect and play the role of increasing production and income.
(1) The seedlings and fertilizers have the effect of promoting roots, strong seedlings and promoting leaves and strong stalks, laying a shelf for high yield and laying a foundation for the ear. In addition to the application of quick-acting nitrogen fertilizer, the seedling fertilizer can also be applied with phosphate fertilizer and potassium fertilizer at the same time, and can also be applied with decomposed organic fertilizer.
(2) Spike fat corn is in the period of vegetative growth and reproductive growth, and it grows vigorously, requiring a large amount of fertilizer. At this time, fertilization can not only meet the nutrient requirements of ear differentiation, but also improve the photosynthesis rate of the middle and upper leaves, so that the nutrients fed into the ear are more, and the grain weight and grain weight are promoted.
(3) Granulated corn is taken from the male to the flowering stage and transferred to reproductive growth. The application of granular fertilizer can prolong the functional period of green leaves, increase the photosynthesis efficiency, increase the accumulation of photosynthetic products, and promote the grain and grain weight.
In addition, the spraying of phosphate fertilizer on the leaf surface in the late growth stage of corn has a significant effect on promoting nutrient transport to grain and increasing 1000-grain weight. Generally, the leaching solution is clarified with 0.4%-0.5% potassium dihydrogen phosphate aqueous solution or 3%--4% calcium superphosphate, and sprayed on the stems and leaves with about 75-100 kg per acre, the effect is remarkable.
Third, master the fertilizer concentration and location of the appropriate fertilization concentration and location, can fully play the fertilizer effect, reduce the loss of fertilizer, and play a cost-effective fertilization. Nitrogen fertilizers for topdressing must be applied deep into the soil in order to fully exert fertilizer efficiency and increase nitrogen use efficiency. Generally, a deep application of nitrogen fertilizer of about 10 cm is appropriate. The seedling fertilizer is applied at a distance of 10-12 cm from the plant, and the panicle fertilizer is applied at a distance of 15-20 cm from the plant, which is beneficial to the absorption and utilization of the plant.
First, select the corresponding topdressing program corn to form a certain yield, need to absorb the corresponding nutrients from the soil and fertilizer, the higher the yield, the more fertilizer needed, it is necessary to select the appropriate topdressing plan according to the yield level and soil conditions. There are 3 types of topdressing options available. High-yield fields, good ground strength, and a large number of top dressings. It is best to use topdressing methods such as light-seeking seedling fertilizer, heavy-chasing ear-fertilizer and compensatory grain-removing fertilizer: the amount of seedling fertilizer accounts for 30% of the total topdressing fertilizer, and the ear fertilizer accounts for about 50%. About 20%. Medium-yield fields, good fertility base, and a large number of top dressings. It is advisable to use the second-strength fertilization method of applying sufficient seedling fertilizer and heavy-seeking fertilizer: about 40% of seedling fertilizer and 60% of ear fertilizer. Low-yield fields, poor soil foundation, and small amount of topdressing should be used for topdressing methods of heavy-seeding seedlings and light-chasing ear fertilizers: about 60% for seedlings and about 40% for panicles.
Second, the good time for topdressing depends on the fertilizer requirement of corn for a lifetime, and the topdressing in the best fertilization period can fully exert the fertilizer effect and play the role of increasing production and income.
(1) The seedlings and fertilizers have the effect of promoting roots, strong seedlings and promoting leaves and strong stalks, laying a shelf for high yield and laying a foundation for the ear. In addition to the application of quick-acting nitrogen fertilizer, the seedling fertilizer can also be applied with phosphate fertilizer and potassium fertilizer at the same time, and can also be applied with decomposed organic fertilizer.
(2) Spike fat corn is in the period of vegetative growth and reproductive growth, and it grows vigorously, requiring a large amount of fertilizer. At this time, fertilization can not only meet the nutrient requirements of ear differentiation, but also improve the photosynthesis rate of the middle and upper leaves, so that the nutrients fed into the ear are more, and the grain weight and grain weight are promoted.
(3) Granulated corn is taken from the male to the flowering stage and transferred to reproductive growth. The application of granular fertilizer can prolong the functional period of green leaves, increase the photosynthesis efficiency, increase the accumulation of photosynthetic products, and promote the grain and grain weight.
In addition, the spraying of phosphate fertilizer on the leaf surface in the late growth stage of corn has a significant effect on promoting nutrient transport to grain and increasing 1000-grain weight. Generally, the leaching solution is clarified with 0.4%-0.5% potassium dihydrogen phosphate aqueous solution or 3%--4% calcium superphosphate, and sprayed on the stems and leaves with about 75-100 kg per acre, the effect is remarkable.
Third, master the fertilizer concentration and location of the appropriate fertilization concentration and location, can fully play the fertilizer effect, reduce the loss of fertilizer, and play a cost-effective fertilization. Nitrogen fertilizers for topdressing must be applied deep into the soil in order to fully exert fertilizer efficiency and increase nitrogen use efficiency. Generally, a deep application of nitrogen fertilizer of about 10 cm is appropriate. The seedling fertilizer is applied at a distance of 10-12 cm from the plant, and the panicle fertilizer is applied at a distance of 15-20 cm from the plant, which is beneficial to the absorption and utilization of the plant.
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