Fertilizer variety
Apply more phosphorus fertilizer to apply less nitrogen fertilizer.
Phosphate fertilizer is applied in high temperature and dry weather. On the one hand, it is because phosphate fertilizer can be used more effectively at higher temperatures, which produces good fertilizer efficiency. On the other hand, it is because phosphate fertilizer can improve the utilization of water in soil and promote each other. The role. In addition, sufficient phosphorus can increase the utilization of nitrogen and play a role in phosphorus and nitrogen. In high temperature and dry weather, the application rate of nitrogen fertilizer should be reduced, especially carbon ammonia which is easily decomposed by heat, because carbon ammonia and high concentration of nitrogen fertilizer which are easily decomposed by heat are easy to cause crop burning.
Number of fertilizer
In the high temperature and dry season, under the illumination of strong light, the temperature of the bare ground can reach 50 °C, the water evaporation is strong, and the concentration of the surface water solution increases sharply. If the same amount of fertilizer is applied under normal weather, the crop yield can not be maintained or Increase production, and is likely to reduce production. For example, when the precipitation is moderate, the application of 12 kg of pure nitrogen per mu may result in high yield, and if the same amount of fertilizer is applied at high temperature and drought, the risk of production is reduced.
Fertilization time
Fertilization in the morning, although the staff feels more comfortable, but as the sun rises, the temperature rises sharply, the water is quickly evaporated, the crop absorption time is short, the fertilizer utilization rate is low; at noon fertilization, due to high temperature, is not conducive to fertilizer Absorption and personnel operation; fertilization in the evening, it is suitable for personnel operation, and can make up for the shortcomings of crop absorption time (because the night is a process of temperature reduction, surface water evaporation is weak, water retention time is long), so it is the best fertilization time. .
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