Because the composition of foliar fertilizer is more complicated, most of them are a mixture of large, medium and trace elements, and a few foliar fertilizers are also mixed with hormones and additives. The metal ions contained are mostly potassium, zinc, manganese, copper, and the like. When so many metal elements encounter alkaline pesticides , antibiotics or pesticides, they will react and have different degrees of turbid precipitation and stratification.
Once the mixture of the fertilizer and fertilizer is sprayed onto the crop, the lighter causes the medicament to fail. In severe cases, the vegetable growth point shrinks, or the symptoms of excessive hormones sometimes cause crop poisoning.
In fact, some fungicides also have the function of foliar fertilizer. For example, azoxystrobin pesticides spray azoxystrobin 4-5 times during the whole growth period of the crop, which not only has excellent disease prevention effect, but also increases chlorophyll, leaves oil green bright and soft, and leaf function period is prolonged.
It can be said that the use of such a bactericide for many times is better than the foliar fertilizer for spraying. The copper ion contained in the copper preparation is one of the trace elements required for crop growth, and is an active element involved in chlorophyll photosynthesis. The copper fertilizer is supplemented by spraying the copper preparation invisibly.
There are many drugs for mancozeb, and after repeated use, crops are generally not deficient in manganese or zinc. Calcium and magnesium are the large amount of elements needed for crops. The water and soil in northern China are rich in content, which can generally meet the needs of crop growth. Sulfur and chlorine preparations are also common and can be replenished during the watering process without the need to deliberately replenish sulfur and chlorine.
In short, the spray blending foliar fertilizer should be cautious, and must be used in a large area after a small area test.
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