The three major misunderstandings of fertilizer

Use fertilizer carefully

Applying chemical fertilizers to crops as seed fertilizers can play a role in timely replenishment of fertilizers and promote the early emergence of strong seedlings, but you should not dress seeds at will. For example, the soaked cotton seeds cannot be dressed with urea, because urea contains a small amount of biuret, which will cause the seed buds to become dehydrated and die during the seed germination process. Kiln ash potash fertilizer can not be used as seed fertilizer, because calcium oxide is very water-absorbing, and it becomes mature lime after absorbing water in the soil, releasing a lot of heat energy, which will affect the germination of seeds. Some chemical fertilizers should be used as seed fertilizers. Seeds that cannot be mixed overnight, such as superphosphate mixed with cotton seeds, will all damage the sprouts if they are planted the next day.

Avoid single species

In the application of chemical fertilizers, the law that should be followed is that nutrients are equally important and irreplaceable. The content of different nutrients in crops often differs by several times or even more, but they cannot replace each other. Such as single application of nitrogen fertilizer, carbohydrates are used to synthesize protein, chlorophyll and other nitrogen-containing compounds in a large amount, the formation of cellulose and pectin is very small, the stems and leaves grow wildly, the crops are late, the grains are not full, and they are prone to lodging or causing pests and diseases. . Chlorine-free crops, such as beans, sugar beets, watermelon, tobacco, etc. The application of chlorine-containing compounds will promote the hydrolysis of carbohydrates in crops, affect the formation of starch and sugar, and reduce yield and quality. There is also a partial application of certain trace elements, which will also have an antagonistic effect on other trace elements, depleting their respective effectiveness. Therefore, in agricultural production, formula fertilization should be vigorously promoted, so as to seek advantages and avoid disadvantages, and balance fertilizer effects.

Prevent excessive fertilization

Appropriate increase in chemical fertilizers can significantly increase crop yields. After the amount of fertilizer is exceeded, not only will the yield not increase, but it will reduce the yield. If the ammonium ion is excessive, it will affect the conversion of glucose to sucrose, reduce the sweetness, and cause nitrous acid poisoning of crops and inhibit the growth of new buds. Excess potassium ions will inhibit the absorption of calcium and magnesium. Therefore, when guiding the application of chemical fertilizers, fertilization should be based on the fertilizer requirements of the crop; fertilization should be based on the local soil and climate conditions at the time; fertilization methods should be paid attention to, quantitative fertilization, deep fertilization, and water adjustment; vigorously advocate or create conditions and sufficient Mixed fertilization of decomposed organic fertilizers enhances the complementary effect.

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