Practice has proved that it is a cost-effective application method to spray the vegetable leaf surface after diluting the micro-fertilizer, but the following "six levels" should be put in the spraying process:
The concentration is off. The concentration is suitable to receive good results, and the application concentration is too high, which is not only useless, but harmful. Generally speaking, suitable spraying concentrations of various micro-fertilizers are: boric acid or borax solution 0, 05---0, 25; ammonium molybdate solution 0, 02%--0, 05%. Zinc sulfate solution 0, 05--0, 2%; copper sulfate solution 0, 01--0, 02%; sulfuric acid to iron solution 0, 2--1%.
The period is closed. The period of spraying micro-fertilizer must be determined according to different vegetable varieties and different micro-fertilizer varieties, and it is generally suitable to spray before flowering.
The dosage is off. The amount of micro-fertilizer sprayed should vary depending on the growth conditions. Generally, 40-75 kg of fertilizing liquid can make the stems and leaves of vegetables wet.
The number of times is off. Foliar application generally uses less fertilizer, so it is difficult to meet the needs of all growth and development processes at one time. Therefore, it is generally appropriate to spray 2 to 4 times according to the length of the vegetable growth period.
Time is off. In order to reduce the loss of micro-fertilizer during the spraying process, it is beneficial to absorb the leaves. It should be sprayed in the afternoon or to the evening when it is cloudy or sunny. This can be used to increase the residence time of the fertilizer solution on the vegetable leaves. Apply the effect.
Mixed spray off. Mixing and spraying with micro-fertilizer, or mixing with other fertilizers and pesticides, can save the process and play the role of “one spray and multiple effectsâ€. However, when mixing, pay attention to clearing the fatness and medicinal properties. If the properties are opposite, they are mutually obstructive and must not be mixed. All kinds of micro-fertilizers should not be mixed with alkaline fertilizers such as grass ash and lime; zinc fertilizer should not be mixed with superphosphate; copper fertilizer should not be mixed with potassium dihydrogen phosphate solution. When mixing with pesticides, the dual effects of fertilizer efficiency and efficacy should be considered. For the sake of prudence, a small amount of solution of micro-fertilizer and pesticide should be placed in the same container before mixing. If there is no turbidity, precipitation and bubbles, it can be mixed. If any of the above phenomena occur, Indicates that the two cannot be mixed. Generally speaking, all kinds of micro-fertilizers cannot be mixed with alkaline pesticides. When preparing a mixed spraying solution, generally, a micro-fertilizer is first formulated into an aqueous solution, and then other medicines and fertilizers are directly added to the prepared micro-fertilizer solution for dissolution.
The concentration is off. The concentration is suitable to receive good results, and the application concentration is too high, which is not only useless, but harmful. Generally speaking, suitable spraying concentrations of various micro-fertilizers are: boric acid or borax solution 0, 05---0, 25; ammonium molybdate solution 0, 02%--0, 05%. Zinc sulfate solution 0, 05--0, 2%; copper sulfate solution 0, 01--0, 02%; sulfuric acid to iron solution 0, 2--1%.
The period is closed. The period of spraying micro-fertilizer must be determined according to different vegetable varieties and different micro-fertilizer varieties, and it is generally suitable to spray before flowering.
The dosage is off. The amount of micro-fertilizer sprayed should vary depending on the growth conditions. Generally, 40-75 kg of fertilizing liquid can make the stems and leaves of vegetables wet.
The number of times is off. Foliar application generally uses less fertilizer, so it is difficult to meet the needs of all growth and development processes at one time. Therefore, it is generally appropriate to spray 2 to 4 times according to the length of the vegetable growth period.
Time is off. In order to reduce the loss of micro-fertilizer during the spraying process, it is beneficial to absorb the leaves. It should be sprayed in the afternoon or to the evening when it is cloudy or sunny. This can be used to increase the residence time of the fertilizer solution on the vegetable leaves. Apply the effect.
Mixed spray off. Mixing and spraying with micro-fertilizer, or mixing with other fertilizers and pesticides, can save the process and play the role of “one spray and multiple effectsâ€. However, when mixing, pay attention to clearing the fatness and medicinal properties. If the properties are opposite, they are mutually obstructive and must not be mixed. All kinds of micro-fertilizers should not be mixed with alkaline fertilizers such as grass ash and lime; zinc fertilizer should not be mixed with superphosphate; copper fertilizer should not be mixed with potassium dihydrogen phosphate solution. When mixing with pesticides, the dual effects of fertilizer efficiency and efficacy should be considered. For the sake of prudence, a small amount of solution of micro-fertilizer and pesticide should be placed in the same container before mixing. If there is no turbidity, precipitation and bubbles, it can be mixed. If any of the above phenomena occur, Indicates that the two cannot be mixed. Generally speaking, all kinds of micro-fertilizers cannot be mixed with alkaline pesticides. When preparing a mixed spraying solution, generally, a micro-fertilizer is first formulated into an aqueous solution, and then other medicines and fertilizers are directly added to the prepared micro-fertilizer solution for dissolution.
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