High-temperature and dry days fertilization method timely change
Temperature is an important external condition for the application of fertilizers, especially at high temperatures and droughts, fertilization may cause crops to reduce production, fertilization must be particularly cautious at high temperatures and droughts.
Fertilizer Varieties Apply More P Fertilizer Less Nitrogen
Phosphate fertilizers, on the one hand, can be used more effectively at higher temperatures, resulting in good fertilizer efficiency; on the other hand, they can increase the availability of water in the soil and act to relieve drought and promote each other. In addition, sufficient phosphorus fertilizer can increase the utilization of nitrogen, play a role in phosphorus nitrogen. Reduce the amount of nitrogen fertilizers, especially carbon-ammonia that is easily decomposed by heat, because heat-decomposable carbon ammonia and high-concentration nitrogen fertilizers can easily cause crops to sprout.
The amount of fertilization cannot be equivalent to normal weather
In high temperature and dry season, the soil moisture evaporates strongly and the concentration of surface water solution increases sharply. At this time, if the fertilizer is applied as much as under normal weather, the crop yield will not be maintained or increased, and production may be reduced. For example, when rainfall is moderate, maize yields 12 kg of pure nitrogen per acre, which may yield high yields. If the same amount of fertiliser is applied at high temperatures and drought, it will face the risk of reduced production.
The best time to apply fertilizer
Fertilization in the morning, although the operator feels more comfortable, but with the rise of the sun, the temperature rises sharply, the water is quickly evaporated, the crop absorption time is short, the fertilizer utilization rate is low; noon fertilization, due to high temperature, is not conducive to fertilizer Absorption and personnel operations; late fertilization, both suitable for personnel operation, but also make up for short crop absorption shortcomings (because the night is a process of lowering temperature, evaporation of surface water is weakened, water retention time is long), is the best fertilization time.
Fertilization method deep application or dissolution diluted watering
Keep a distance of more than 10 cm from the plants during fertilization to avoid direct contact of the chemical fertilizers with the roots of the plants. At noon, the high temperature above 35°C generally does not top-up fertilizer. The best fertilization time is in the evening, which is suitable for personnel operation and beneficial to crop absorption.
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