How to apply micro-fertilizer in autumn sowing crops
The soaking method first dilutes the micro-fertilizer with water, and then puts the seed into the micro-fertilizer solution, so that the seed absorbs the fertilizer liquid and expands, and the fertilizer enters the seed with the water liquid. Therefore, in the soaking process, the seeds must be frequently turned over so that the seeds can evenly absorb the fertilizer. The concentration and time of the commonly used soaking seeds are: molybdenum fertilizer is immersed in 0.05%~0.1% ammonium molybdate solution for 10~12 hours; boron fertilizer is 0.05. % borax solution is immersed for 4~6 hours; zinc fertilizer is immersed in 0.05% zinc sulphate solution for 12~24 hours; manganese fertilizer is immersed in 0.1% manganese sulphate solution for 8~12 hours; rare earth micro-fertilizer is 0.03%~0.1% nitric acid Rare earth immersion for 10~12 hours. After the seeds are soaked, they can be sown after being dried and dried.
The seed dressing method first dissolves the relevant micro-fertilizer with a small amount of water, and prepares a high-concentration fertilizer solution, and then sprays the fertilizer liquid on the seed with a clean sprayer, while spraying and mixing, so that the surface of the seed is stained with a layer of fertilizer liquid, generally Only 0.5 to 4 grams of micro-fertilizer per 0.5 kg of seeds can be sown after the seeds are dried and dried. If it is dry mix, it is necessary to mix the micro-fertilizer powder and the seeds thoroughly. The amount of seed dressing is generally 2~6 grams of borax, 2~4 grams of ammonium molybdate, 8~15 grams of copper sulfate, sulfuric acid. Zinc 4~6g, copper sulfate 4~6g, rare earth micro-fertilizer 2~4g.
When the soil-casting autumn-sown crops are planted, 0.5 to 1.5 kg of micro-fertilizer and seeds are simultaneously planted into the seeding ditch. If the amount of soil is sufficient, it can be used for the whole growth period of the crop. Experiments show that when the amount of micro-fertilizer is large, the micro-nutrient content of the plant is large. Because the micro-fertilizer is easily fixed by soil particles in the soil, the dosage is large and the investment is high, so try to concentrate on it to reduce the loss of soil in the season. The micro-fertilizer can not only achieve good results in the season or the current year, but also for several years. Therefore, the soil application method is suitable for farmers with better economic conditions and less labor.
The spray method applies the micro-fertilizer evenly to the leaf surface of the crop, and is then absorbed by the leaf and then supplied to various parts of the plant. This is a commonly used fertilization method, which is economical and effective. The practice is: first dilute the relevant micro-fertilizer with water and then spray. Usually borax or boric acid is 0.1%~0.25%, ammonium molybdate is 0.05%~0.1%, copper sulfate is 0.01%~0.02%, manganese sulfate is 0.05%~0.1%, copper sulfate is 0.01%~0.02%, rare earth nitrate It is 0.03%~0.1%. The number of sprays is determined according to the length of the crop growth period. It is advisable to spray more sensitive crops and deficient soils, and it is better to use the stems and leaves to moisten each time. It is better to choose the sunny evening spray to extend the wet time of the fertilizer on the crop leaves as much as possible and enhance the fertilizer absorption effect. Finally, according to the needs, several kinds of micro-fertilizers are sprayed or mixed with other fertilizers and pesticides to achieve complementary fertilizers, mutual promotion, and labor-saving effects. However, it must be observed in a small amount before mixing, and there are no adverse reactions such as turbidity, precipitation, and bubbling. If it is, it cannot be mixed to avoid waste and side effects.
Note: The concentration should be applied evenly. The demand for trace elements in crops is small, and the range of micro-fertilizers from lack to application is quite narrow. Therefore, to prevent excessive dosage, pay attention to uniform application. Note the use with a large amount of elemental fertilizer. On the basis of satisfying the demand for a large number of elements in the crop, the micro-fertilizer can show a significant increase in yield. Pay attention to the extent to which various crops respond to micronutrient. Planting the same crops in successive years, or applying fertilizers containing a large amount of elements, and not paying attention to the application of organic fertilizer, is prone to trace element deficiency.
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Flap Disc
Flap disc, commonly known as flat emery cloth wheels, emery discs, flower impellers or elastic grinding discs, are a large variety of coated abrasive conversion products, which press the cut coated abrasive sheets one by one. It is formed by sticking adhesive to the back cover plate along the circumference. The flap disc are called strong elastic grinding discs. They are made of calcined emery cloth, which uses mesh, nylon, plastic, steel paper and other materials as the base. Attached abrasive tools, evenly distributed in a fan shape to ensure the best grinding effect. The particle size is 36#-320#, 60# and 80# are the most common, and the outer diameter is 4"-7" installed on the angle grinder. Angle grinders are mainly installed on hand-held Power Tools to polish and polish welds, burrs, chamfers, surface rust removal, and surface polishing of various metal and non-metal parts.
The flat emery cloth wheel (flap wheel) is formed by sticking multiple emery cloth sheets on the tray in a fan-shaped superimposed arrangement, and the bonding angle between each emery cloth and the tray plane is 10°-30°. The emery cloth arrangement of the utility model can make When the abrasive cloth wheel grinds and polishes the workpiece to be processed, the cutting angle is optimized to ensure that the base material of the abrasive cloth wheel and the grinding are consumed simultaneously, which obviously improves the overall wear resistance and grinding efficiency of the flat abrasive cloth wheel, and prolongs the service life of the abrasive cloth wheel. Grind the surface of metallic and non-metallic materials.
product advantages:
Compared with the resin grinding wheel for fixed abrasives, it has the advantages of polishing and polishing at one time, shortening the operation time, saving the grinding cost, high efficiency, good heat dissipation, high grinding efficiency, reducing operator fatigue, increasing machine life, etc. It has strong elasticity, High tensile and bending strength and good grinding effect. The grinding speed is fast, the effect is good, and the noise during grinding is low. It is suitable for various industries or fields of manufacturing such as major metal parts factories and machinery factories. Good weather resistance, salt spray resistance and heat resistance, suitable for use in different regions.
Scope of application:
It is suitable for polishing of stainless steel, metal, metallurgy, automobile, wood, marble and other industries. It is especially suitable for the processing of stainless steel and can replace the resin-shaped grinding wheel. It has strong elasticity, high tensile and bending strength, good self-sharpening, high grinding rate, and low noise. It is suitable for welding seams in the box. Polishing of the edges.
There are different classifications of louvers according to different angles. The following are two common classifications:
According to the appearance: T27 VS T29
Flap disc generally have two shapes, curved and flat.
The flap disc type is also called the T27 type, and the curved type generally refers to the T29 type.
The flap disc type (T27) has a flat surface. It is mainly used to polish the flat surface and the external edges and corners. The flap disc and the workpiece are angled during work, which can complete the grinding and polishing at one time, reducing the work flow.
The curved surface of the curved louver (T29) has an upward arc, which makes the T29 flap disc have a better cutting ability on the plane. When working, the T29 type grinding wheel forms an angle of 15° to 25° with the grinding surface, which is mainly used to deal with the grinding of contours and edges. When there are higher requirements for speed and cutting ability, T29 flap disc is undoubtedly the best choice.
The related abrasive products we can supply is Flap Disc Adhesive, Bonded Abrasives , and Abrasive Machine such as Flap Disc Making Machine,Abrasive Belt Making Machine, Flap Wheel Machine , Polishing Machine ,Sanding Disc Machine, if you have any needs about abrasive tools, please kindly feel free to contact us.
According to the type of abrasive particles: ceramic alumina VS zirconium corundum VS alumina
According to the type of abrasive selected, the flap disc can be divided into three types: ceramic alumina, zirconium corundum and alumina.
Because ceramic alumina itself has many crystals, it has good self-sharpening, relatively neat edges, good heat dissipation, and long service life. Therefore, ceramic alumina louvers are mainly used for the grinding of stainless steel, aluminum and other hard metals.
Zirconium corundum itself is a polycrystalline crystal, with fast cutting speed, good self-sharpening, and strong resistance to high pressure and high temperature. Therefore, zirconium corundum louver blades have strong cutting ability and long service life.
Alumina: single crystal, the cutting ability begins to decline at the beginning of grinding, and the abrasive grains are not easy to break, so the alumina flap disc is suitable for the processing of common metals.
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