Rushing fertilizer is widely used in greenhouses and open vegetables, mainly used in the period of strong vegetable growth, such as the fruiting period of vegetable vegetables, the picking period of Chinese cabbage after harvesting fruits and fruits. Because of the quick effect of flushing fertilizer, the general fertilizer will be effective two days after the application. Therefore, it has been adopted by many vegetable farmers in recent years.
The purpose of fertilization is not only to produce high yields of crops, but also to pay attention to comprehensive benefits. To this end, it is necessary to master the technical essentials of fertilization. First, choose the type of fertilizer that is fertilized. Only water-soluble fertilizers can be applied with water. Nitrogen fertilizers are commonly used in urea, ammonia, ammonium sulfate and ammonium nitrate; potassium fertilizers are commonly used potassium chloride and potassium sulfate, and potassium nitrate can also be used. Phosphate fertilizer, even water-soluble ammonium dihydrogen phosphate and diammonium phosphate, should not be applied. The reason is that the phosphate fertilizer has poor mobility after being dissolved, and it is easy to be fixed and cannot penetrate into the root layer with water. Therefore, it is best to apply the phosphate fertilizer in the soil layer in order to improve its utilization. The nutrient content of a single application of fertilization must be standardized. In the high-yield cultivation of vegetables, the amount of pure nitrogen per mu should be controlled at 2 to 4 kg per acre, especially the nitrate nitrogen should be controlled at 2 to 3 kg per acre, a limited number of times. The amount of potassium (potassium oxide) is generally 2 to 4 kg per acre. Otherwise, the waste and loss of nutrients are large, which not only reduces the fertilizer utilization rate, but also may cause pollution to water quality.
In the control of irrigation amount, it is necessary to prevent flooding when flooding; when the canal is filled, the depth of the ditch is adapted to the amount of water to prevent the nutrients dissolved in the water from being lost with water.
In addition, granular compound fertilizer, solid organic fertilizer, microbial preparation or fertilizer should not be applied.
Source: Shandong Science and Technology News
Mini Flap Disc
flap discs are widely used in automobiles, stainless steel products, metal products, glass manufacturing and other industries, and have special effects on welds, solder joints, flash, rust removal and surface polishing. The reason why the Flap Disc is so widely used is because it has five advantages that cannot be ignored:
1. The flap disc blades have high hardness, high strength and strong grinding ability during use.
2. The flap disc has low noise, low vibration and long service life during use.
3. The flap disc has strong wear resistance and long service life.
4. It is not easy to generate heat and burn parts during use.
5. The use of flap disc can improve work efficiency.
The related abrasive products we can supply is Flap Disc Adhesive, Flap Wheels , Sanding Belt , 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.
The flap disc blades can be used instead of resin Grinding Wheels and steel wire wheels. They have a good effect on rust removal, grinding and polishing. It is a good way to polish and remove rust. It is worth choosing!
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.
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