Concentration off Concentration is appropriate to receive good results. If the concentration is too high, it is not only useless, but harmful. Generally speaking, the suitable spraying concentration of various micro-fertilizers is: boric acid or borax solution 0.05%～0.2%, ammonium molybdate solution 0.02%～0.05%, zinc sulfate solution 0.05%～0.2%, copper sulfate solution 0.01%～ 0.02%, ferric sulfate solution 0.2%～1%.
The dosage is close to 40 to 75 kg per acre of fertilizing solution, which can make the vegetable stems and leaves wet.
The number of times is usually less for foliar spraying, so it is difficult to meet the needs of all growth and development processes at one time. Therefore, according to the length of vegetable growth period, spraying 2 to 4 times is appropriate.
Time is concerned to reduce the loss of micro-fertilizer during the spraying process, which is beneficial to the absorption of the leaves. Spraying should be selected from cloudy or sunny afternoon to evening, so that the retention time of the fertilizer solution on the vegetable leaves can be extended, which is helpful to improve the spraying.施结果。 Application effect.
Mixed spray off Mixed spraying between micro-fertilizers or mixed spraying with other fertilizers and pesticides can save the process and play the role of "one spray and multiple effects". However, pay attention to clarify the fertility and medicinal properties when mixing them. If the properties are opposite, they interfere with each other and must not be mixed. All kinds of micro-fertilizers should not be mixed with alkaline fertilizers such as grass ash and lime, zinc fertilizers should not be mixed with superphosphate, and copper fertilizers should not be mixed with potassium dihydrogen phosphate solution.
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