Temperature is an extremely important condition affecting the effect of fertilizer application. It can affect the conversion of fertilizer in soil and the accumulation of effective nutrients. On the other hand, it also affects the internal physiological effects of crops. In high temperature and dry season, fertilization can not only promote Crops increase production and may reduce production. First, according to the physiological growth and development process of plants, combined with crop critical area and maximum potency, timely and effective topdressing. If there is growth, it will be fertilized, and if the amount of growth is small, it will be applied less or not. If the amount of growth is large, it will be applied (but not excessive). The stage in which fertilizer is most needed is the period of vigorous growth, flowering and fruiting of crops.
Second, the combination of NPK plays a mutually reinforcing role: on the one hand, phosphate fertilizer can be used more efficiently at higher temperatures, producing good fertilizer efficiency. On the other hand, sufficient phosphorus can increase nitrogen utilization rate. To the role of phosphorus to raise nitrogen. Because carbon ammonia is easily decomposed by heat and high concentration of nitrogen fertilizer is easy to cause crop burning, high temperature and dry weather should reduce the application rate of nitrogen fertilizer.
Third, the best fertilization method: deep application, dilution and pouring with water. It is best to plant greenhouses in key greenhouses for water and fertilizer integration, or drip irrigation. No matter what method is adopted, the plant should be kept at a distance of more than 10 cm to avoid direct contact of the fertilizer with plant straw burning. Especially peppers, flue-cured tobacco, melons, and vegetable crops.
Fourth, high temperature and drought at noon 35 ° C above the high temperature weather generally does not advocate top dressing, the best fertilization time is in the evening, suitable for personnel operation, but also can make up for the shortcomings of short crop absorption time, is the best time for fertilization.
Second, the combination of NPK plays a mutually reinforcing role: on the one hand, phosphate fertilizer can be used more efficiently at higher temperatures, producing good fertilizer efficiency. On the other hand, sufficient phosphorus can increase nitrogen utilization rate. To the role of phosphorus to raise nitrogen. Because carbon ammonia is easily decomposed by heat and high concentration of nitrogen fertilizer is easy to cause crop burning, high temperature and dry weather should reduce the application rate of nitrogen fertilizer.
Third, the best fertilization method: deep application, dilution and pouring with water. It is best to plant greenhouses in key greenhouses for water and fertilizer integration, or drip irrigation. No matter what method is adopted, the plant should be kept at a distance of more than 10 cm to avoid direct contact of the fertilizer with plant straw burning. Especially peppers, flue-cured tobacco, melons, and vegetable crops.
Fourth, high temperature and drought at noon 35 ° C above the high temperature weather generally does not advocate top dressing, the best fertilization time is in the evening, suitable for personnel operation, but also can make up for the shortcomings of short crop absorption time, is the best time for fertilization.
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