Recently, the author visited the fruit-producing areas and found that farmers in various places still used some unreasonable fertilization methods in production. “One shot†is one of them. The so-called fertilization “one shot†means that the organic fertilizer is mixed with inorganic fertilizer in the autumn and is applied once to the fruit trees, and no fertilizer is applied in other seasons. Fertilization of fruit trees does not promote "one-shot" because this method of fertilization does not meet the annual requirement of fruit trees.
Generally, the north deciduous fruit tree is a crop with long growth cycle. The absorption of three main elements nitrogen, phosphorus and potassium can be considered as the peak period of nitrogen absorption in spring and the absorption of potassium before fruit expansion after fruit set and before harvest. During the peak period, the absorption of phosphorus was relatively flat during the anniversary and there was no obvious peak period. Just looking at the characteristics of this fertilizer requirement, it is not appropriate to apply the inorganic fertilizer at one time to apply fruit trees once. For example, in the fall, if nitrogen and potassium fertilizers needed for fruit trees are blended with organic fertilizers once in a year and applied at a time, and this is not the peak period of nitrogen and potassium absorption in fruit trees, the applied nitrogen and potassium are for fruit trees. Excessive, inorganic nutrients that cannot be used in fruit trees are bound to be fixed or lost in the soil, and nitrogen or potassium may be insufficient in the fruit trees during the peak period of nitrogen requirement or potassium demand. For fruit trees, for every hundred kilograms of fruit produced, there is a scientifically determined proportion of nitrogen, phosphorus, and potassium that is absorbed. Based on this ratio, the rate of absorption and loss of fertiliser can be considered, and a variety of inorganic substances can be given. The amount of fertilizer applied. However, this amount of fertilizer is not the amount that is applied to fruit trees at one time, but refers to the amount of fertilizer that fruit trees use throughout the year. Fertilization of fruit trees should be based on the characteristics of the nutrient requirements of the amount of fertilizer and fruit trees in different periods of the year, and fertilizers of different compositions should be mainly applied in stages.
Some fruit growers fertilize the "one bombardment" by confusing the characteristics of organic fertilizers with the characteristics of inorganic fertilizers. Organic fertilizers are generally required to be applied once after the fruit is harvested because the organic fertilizer has a relatively long-lasting fertilizer effect. The main purpose of the application is to improve the soil environment. Inorganic fertilizers are characterized by quick effect and short duration. It is best to apply them in different times according to the requirement of fertilizer requirements in different periods of fruit trees.
Fluorine-Containing Phenylamine
Most of the Fluorine-Containing Phenylamine products are a light yellow oily liquid, relatively high density, insoluble in water. Most of them are used in the manufacturing of pesticides and dye intermediates, small part of them can be used as an analytical reagent. The steam or smoke of fluorine-containing phenylamine series is irritated to eyes, mucous membranes and upper respiratory. Vapor and air can form explosive mixtures, in case of fire, high-heat combustion caused the explosion. And oxidant may react. Decomposition by high fever and emit toxic gases. In case of high fever, increased pressure within containers, cracking and the risk of explosion. Protective measures must be done carefully during product storage. Once the fire occurred, it must be immediately evacuated from air leakage,personnel to a safe area, prohibit access to the contaminated area. Recommended emergency personnel wearing self-contained breathing apparatus and wear chemical protective clothing. In the ambulance personnel to ensure proper safety measures, immediately use foam, carbon dioxide, dry, sandy soil to put out a fire.
Containing Phenylamine,2-Bromo-4-Methoxy-Phenylamine,5-Fluoro-2-Iodoaniline
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