1, concentration
Appropriate spraying concentration can receive good results, and high concentration is not only unfavorable 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, period
In order to reduce the loss of trace fertilizer in the spraying process, it is better to choose cloudy spraying, and sunny days should be sprayed in the afternoon to evening to extend the moistening time of the fertilizer solution on stems and leaves as much as possible to facilitate absorption.
3, dosage
The amount of trace elements required for vegetables is very small, and the critical range of various trace elements from the lack to the excess is very narrow. A slight lack or excess may cause harm. Generally, 40-75 kilograms of fertilizer solution for a mu can make the stems and leaves of vegetables evenly wet, and avoid repeated application.
4, the number of times according to the growth and development of vegetables, usually 2-4 times.
5, mixed spray
Proper mixing and spraying of trace fertilizers, or mixed spraying with other fertilizers or pesticides, can play a role of “one injection and multiple effectsâ€, but it is necessary to clarify the physical and chemical properties of fertilizers and pesticides to prevent chemical reactions and reduce fertilizers. )effect.
Contributed by: Inner Mongolia Soil and Fertilizer Workstation
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Major components:Pullulan and purified water
Character:The product is cylindrical and is made of two hard and elastic empty sacs made up of two sets of cap and body. The bag is smooth, uniform in color, smooth in incision, free of deformation, non-toxic and harmless, and is no odor
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