When is the best time to fertilize corn seedlings and when is the best topdressing for corn?

Tapping stalk fertilizer. Generally, when there are 6-8 leaves and a seedling height of 30 cm, it is a critical period for phosphorus and potassium fertilizers, and you can choose "potassium dihydrogen phosphate in fertile leaves". Tapping straw fertilizer can promote the enlargement of the upper leaves of maize, expand the photosynthesis area, prolong the functional period of the lower leaves, and lay a good foundation for promoting roots, strengthening stalks and increasing ears.

Tapping ear fertilizer. Top dressing at the corn trumpet stage, that is, 10-15 days before tasseling, and 12-13 leaves. This stage is the most vigorous period of corn growth and development, which requires more fertilizer and water, and is the key period to determine the size of the ear and the number of grains per ear.

At this time, the heavy application of ear fertilizer and the simultaneous attack of fertilizer and water can not only meet the fertilizer and water needs of panicle differentiation, but also improve the photosynthetic productivity of the middle and upper leaves, so that the input ear nutrients are more, and the grains are more and full, which has a significant effect on improving the yield.

Tapping fertilizer. It refers to a top dressing before and after pollination when the female spike filaments begin to be extracted. The main purpose is to prevent late defertilization, prolong the functional period of the upper leaves, promote grain filling, increase grain weight, and improve yield.

Corn topdressing should be based on soil fertility, variety fertilizer characteristics, variety growth period and other appropriate amount of topdressing to meet the needs of corn growth and development. However, the previous time to chase less, the latter to chase more, whether to chase the grain fertilizer should be based on the soil fertility status. In the later stage, the soil that is easy to defertilize can chase a little less tapping fertilizer, so as not to cause too much topdressing to cause greedy green and late ripening and reduce yield.

In the three stages of maize growth, the proportion of fertilizer required is different, the seedling stage accounts for 2 of the total fertilizer requirement, the ear stage accounts for 85, and the grain stage accounts for 13.

1.Corn from jointing to the bell stage, is the peak period of fertilizer, fertilization to achieve reasonable fertilization, that is, the combination of base fertilizer, seed fertilizer, top dressing; combination of nitrogen, phosphate and potassium fertilizers; Combination of agricultural fertilizer, chemical fertilizer and biological fertilizer. Bottom fertilizer should be applied sufficiently, which is the foundation, generally 2000 kg of rotted organic fertilizer, phosphorus pentoxide kilograms, potassium fertilizer kilograms as base fertilizer.

2.In the base fertilizer, seed fertilizer application level is not high, soil conditions are poor, planting late-maturing varieties of plots, can be in the corn 6 7 leaf stage, top dressing, about 15 kg of urea per mu, deep chase more than 15 cm, improve fertilizer utilization; Bottom fertilizer and seed fertilizer are applied to the plots with high levels, and about 10 kg of urea per mu.

3.Corn topdressing should be carried out as soon as possible, the first method is the front topdressing, the back of the ground, topdressing and the land should be combined; the second is to use a pickaxe to dig the pit and chase more than 15 centimeters deep; When topdressing, it is necessary to combine chemical fertilizer and biological fertilizer to promote the good development of the root system, under normal circumstances, 10 15 kg of urea per mu, plus 1 kg of biological fertilizer, can promote the early maturity of corn.

4.In the heading stage and filling stage, the mu is sprayed with kilograms of potassium dihydrogen phosphate and kilograms of urea, mixed with 50 kilograms of water, which can prevent baldness and grain deficiency, increase yield and improve quality.

5.Organic food corn, can not use chemical fertilizer, it is best to use fermented organic fertilizer, do base fertilizer, top dressing with cake fertilizer, fertilizer effect is stable and lasting, the effect is better than chemical fertilizer, and the stamina is long, but when topdressing, cake fertilizer and crop seedlings keep an appropriate distance, so as not to burn the seedlings caused by the heat generated during the fermentation of cake fertilizer.

<> corn is fertilized once a month. Yuhu lacks wild rice topdressing needs 2 times, respectively at the corn seedling stage, tassel, the first application of potassium fertilizer, the second application of nitrogen fertilizer.

The growth period of corn will be affected by the seasonal climate, varieties and so on, generally about 100 to 130 days, in this period, corn will go through the seedling tolerance period, ear stage, flowering stage, fruit stage several stages.

Corn is highly drought tolerant, cold tolerant, barren tolerant and excellent environmental adaptability. Corn has a high nutritional value and is an excellent food crop.

<> corn is fertilized once a month. Corn topdressing needs to be done twice, respectively at the corn seedling stage, the first time to apply potassium fertilizer, and the second time to apply nitrogen fertilizer.

The growth period of corn will be affected by the seasonal climate, variety, etc., generally about 100 to 130 days, in this period, corn will go through the seedling stage, ear stage, flower and grain stage, fruit stage several stages. Hu Queye.

Corn is very drought tolerant, cold tolerant, barren tolerant and excellent environmental adaptability. Corn has a high nutritional value and is an excellent food crop.

<> corn is fertilized once a month. Corn topdressing needs to be done twice, respectively, at the corn seedling stage, tassel, and liquid tung hui for the first time to apply potassium fertilizer, and the second time to apply nitrogen fertilizer.

The growth period of corn will be affected by the seasonal climate, variety, etc., generally about 100 to 130 days, in this period, corn will go through the seedling stage, ear stage, flower and grain stage, fruit stage several stages.

Corn has strong drought tolerance, cold tolerance, barrenness tolerance and excellent environmental adaptability. Corn has a high nutritional value and is an excellent food crop.

Corn can generally be fertilized about 11 days after the seedlings emerge, and the seedling fertilizer can be applied, which can promote the growth of weak seedlings and ensure that the growth rate of corn seedlings in the field is consistent; When the corn plant grows to 41-51 cm, the seedling fertilizer can be applied to the hidden hood, which can make the corn grow rapidly, thereby improving the growth efficiency of the corn. Qi seedling fertilizer and seedling fertilizer can be used urea, compound fertilizer, phosphate fertilizer, potassium fertilizer and other fertilizers, for example, urea is the mainstay, and then mixed with 30 kg of compound fertilizer in an appropriate amount.

<> corn can generally be fertilized about 11 days after emergence, and full seedling fertilizer can be applied, which can promote the growth of weak seedlings and ensure the consistent growth rate of corn seedlings in the field; When the corn plant grows to 41-51 cm, the seedling fertilizer can make the corn grow rapidly, thereby improving the growth efficiency of the corn. Qi seedling fertilizer and seedling fertilizer can be used urea, compound fertilizer, phosphate fertilizer, potassium fertilizer and other fertilizers, for example, urea-based, and then shouted to mix an appropriate amount of 30 kg of compound fertilizer.

Usually in the seedling stage, ear stage, flowering and grain stage of corn is the most suitable for fertilization, fertilization is usually carried out with urea, compound fertilizer and other fertilizers according to soil conditions and corn growth.

Pumping can increase the yield of the upper leaves of maize and improve photosynthesis. From 7 days to 13 days before heading, maize leaves are in the heading stage, the most vigorous development period, and the most need for fertilizer and water, which is the key period to determine the size of the ear type and the number of grains per panicle. At this time fertilizer and water should be used at the same time to increase the yield with a significant impact.

Precautions for corn topdressing:

If topdressing three times, the seedling stage should not be topdressing too early, 5-6 leaves are appropriate, in order to facilitate squatting seedlings thick and strong; Jointing fertilizer is generally in 10-11 leaves is appropriate, mechanical operation can be appropriately advanced, to avoid agricultural machinery and seedlings injury, ear fertilizer should pay attention to the amount of nitrogen front rolling fertilizer, in order to prevent greed; If you top the fertilizer once, you should chase the jointing fertilizer.

Do deep fertilization: Corn top dressing must be done deeply, otherwise it will reduce fertilizer utilization. The most suitable depth is 5-10 cm, and the soil is covered in time.

Look at the growth of top dressing: seedlings are uneven plots, in the top dressing of strong seedlings and weak seedlings should be treated differently, weak seedlings should be silver to be appropriately early top dressing, if necessary, can be sprayed separately foliar fertilizer, to promote the early growth of weak seedlings, strong seedlings top dressing time is appropriately delayed.

When the corn is in the seedling stage, it is necessary to apply a seedling fertilizer, pay attention not to apply thick fertilizer Fengji, so that the corn plant can grow vigorously, maintain the corn in the seedling stage, and do a good job in water management to avoid plant water shortage or long-term drought, and also need regular weeding and pest control.

1. Fertilization method

When the corn seedling stage, it is necessary to apply a seedling fertilizer to it when planting, so as to promote the vigorous growth of corn plants, at this time, you can apply some compound fertilizer, phosphate fertilizer, potassium fertilizer and urea, etc., fertilizer can be applied in the hole, pay attention to not apply thick fertilizer to it, so as not to produce fertilizer damage.

2. Water management

When the corn seedling stage, it needs to do a good job of water management, it needs sufficient water to be able to grow vigorously, but the plant is not resistant to waterlogging, so in the rainy season, it needs to be drained when the silver travel, so as not to cause corn root rot due to water accumulation in the soil, but it needs to be irrigated more in the dry season.

3. Cultivating and weeding

In order to make the corn seedlings grow vigorously, then it is necessary to regularly plough and weed, so that the soil can become loose and breathable, which is conducive to the growth of corn roots, and can also prevent weeds and corn plants from competing for nutrients.

4. Prevention and control of diseases

When the corn seedling stage, it is also necessary to do a good job in the prevention and control of pests and diseases, it is best to disinfect the soil before planting, and if the corn produces pests and diseases during the maintenance process, it is necessary to spray the plant with special drugs in time, so that the corn can recover its health.