1, concentration
It is good to receive good results when the concentration is suitable. The high concentration is not only unhelpful but harmful. Usually boric acid or borax 0.05%-0.25%, ammonium molybdate 0.02%-0.05%, copper sulfate 0.01%-0.02%. If high concentration is required, it should not exceed 20% of the specified concentration.
2, in order to reduce the loss of micro-fertilizer in the spraying process, it is best to choose cloudy spray, sunny days should be sprayed in the afternoon to evening, in order to extend the wet time of the fertilizer on the stems and leaves as much as possible, in order to benefit absorb.
3, the amount
The amount of trace elements required for vegetables is small, and the critical range of various trace elements from lack to excess is very narrow, and a slight lack or excess may cause harm. Generally, 40-75 kilograms of fertilized liquid per mu can make the stems and leaves of vegetables evenly wet, avoiding repeated application.
4, the number of times according to the growth and development of vegetables, usually 2-4 times.
5. Reasonable mixing and spraying between mixed spray and micro-fertilizer, or mixed with other fertilizers or pesticides, can play the role of “one spray and multiple effectsâ€, but it is necessary to clarify the physical and chemical properties of fertilizers and pesticides to prevent chemical reactions and Reduce the effect of fertilizer (drug).
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