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First, technical measures
1. The choice of fertilizer. In order to ensure that the corn is not de-fertilized in the later stage of growth, long-acting nitrogen fertilizer should be used. Such as coated urea, coated urea, long-acting ammonium bicarbonate. In addition, attention should be paid to the combination of fertilizers to make the nutrients comprehensive.
2. Application time. For plots with irrigated conditions or good moisture in spring, spring application can be used; for plots without hydration conditions, it should be applied in autumn.
3. Determination of the amount of fertilizer applied. According to the production target and the level of soil level, the formula fertilization, generally high-fertility soil, the plot of more than 750 kg per mu, should be applied 20 kg of long-acting urea, 25 kg of corn special fertilizer (or 15 kg of diammonium), micro-fertilizer 1. 25 kg, medium fertility soil, about 600 kg per mu, should be applied long-acting urea 25 kg, corn special fertilizer 20 kg, diammonium 10 kg, micro-fertilizer 1.25 kg. For low-fertilizer soil yields below 500 kg, 30 kg of long-acting urea, 30 kg of corn special fertilizer, 15 kg of diammonium and 1.25 kg of micro-fertilizer should be applied.
4, application method
Before the combination of autumn cultivated land or spring land preparation, the fertilizer will be uniformly applied to the surface at one time, and then tillage and rotary tillage will be carried out in time. In the autumn, it should be noted that it is suppressed twice in winter, which plays an important role in protecting the fat.
Second, the role and effect
1. The role of drought resistance and conservation: Due to the one-time application of fertilizer, the number of cultivation of soil is reduced, water evaporation is reduced, and water is increased by 2-3 percentage points. Especially in the autumn, after the snowfall in winter, the pressure is suppressed, which avoids the drought caused by the spring application and the wind and the wind, which lays the foundation for the spring seeding.
2. After the one-time application of long-acting fertilizer, the crop does not need topdressing, which can simplify production management, save labor and labor, reduce labor intensity, and win time for improving the overall economy of the family.
3. Improve the utilization rate of fertilizer, long-term fertilizer efficiency, increase production, and improve efficiency.
Since the long-acting fertilizer is applied to the soil, it will slowly decompose for a long time, release nutrients, and supply crops. It avoids the traditional fertilization method, because of the weather, drought, no rain, no fertilizer, delay of nutrient accumulation caused by agricultural time or concentrated fertilization and nutrient enrichment, and improved fertilizer utilization. 10-15%. Generally, the number of grains per spike is increased by more than 20 grains, and the weight of 1000 grains is increased by more than 20 grams, and the yield is increased by 10-30%. Increased overall economic efficiency.
Dry bottom corn fertilizer
The one-off application of corn fertilizer in dry land is to apply the fertilizer required for the whole growth period of corn to the soil before the autumn or spring tillage. The technical measures for the corn growth period do not need topdressing. It has changed the traditional fertilization program and is a fertilization method adapted to the development of water-saving agriculture in dry farming and the characteristics of northern climate.
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