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.
Extinction curing agent extinction principle is to use two different kinds of reactivity of the curing agent system, in which there are a kind of system of curing reactivity, reaction speed, small another system of curing reactivity, slow reaction, two kinds of powder coating film forming matter system and reaction rate differences between the difference of compatibility between the two kinds of reaction products, form the onlookers rough surface on the diffuse reflection and scattering light, and weak reflection power extinction film.
Matt Hardener,Hybrid Powder Coatings,Silicone Matting Powder White,Material Matt Hardener
Guangzhou Quanxu Technology Co Ltd , https://www.skyelecteflonheater.com