Mingtai Balance Arm Suspension System For Shadowless Lamp
Shandong Mingtai Medical Equipment Group Co., Ltd is established in 2000 year, supporting operating room and ICU medical equipment. Since company established, continue to develop, keep making progress, let people enjoy the health future with better quality and service. Mingtai products get ISO13485, ISO9001, CE & SFDA certification. Mingtai company have many patents. Mingtai brand series Operating Light, Operating Table, Medical Pendant , Hospital Bed and air disinfection equipment meet different distributor and customer`s different requirement.
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First, the advantages of chemical fertilizer The main advantage of fertilizer is that it can increase the total amount of nutrients in soil and crops. 1. The nutrient content of high urea nitrogen is 46%, and the general phosphorus calcium phosphate content is 12% to 18%. Pure horse manure contains 0.4%-0.5% nitrogen and 0.2%-0.35% phosphorus. One kilogram of ammonium sulfate is equivalent to 30-40 kilograms of human waste, and 1 kilogram of calcium phosphate is equivalent to 60-80 kilograms of manure. With high nutrient content and less use per unit area, it is easy to transport and saves labor. 2. Fertilizer fast fertilizers are water-soluble or weakly acid-soluble. They can be rapidly absorbed and utilized by crops when applied to the soil. Fertility is fast and significant. 3. Raw material-rich fertilizers are produced from natural mineral resources. These raw materials are abundant and can be mined in large quantities. 4. The production of chemical fertilizers using industrialized production is rich in raw materials and can be produced on a large scale industrially. It is not subject to seasonal restrictions and yields are large. 5. Save on transportation and labor. Fertilizer has high nutrient content and less consumption. The expenses and labor costs for transportation and application are relatively low. 6, easy to save and long-term storage of fertilizer compared with farmyard fertilizer is small, nutrient stability, easy to save, long shelf life, not easily degenerate. 7, a variety of performance Some fertilizers can not only provide crop nutrients, but also can enhance crop resistance and insecticidal role. Second, the weakness of chemical fertilizers 1. Single nutrient fertilizer The general fertilizer does not contain organic matter, and its composition is relatively single, containing only one or two or three nutrients. Even compound fertilizers rich in nutrients are unlikely to be as comprehensive as organic fertilizers. 2. There are limitations to fertilizers on the soil and crops. The use of chemical fertilizers should be based on the soil and crops to select the appropriate species in order to obtain satisfactory results, otherwise it would be counterproductive. 3, the application of chemical fertilizers should pay attention to methods of high concentration of fertilizers, solubility, if used improperly, it is likely to cause harm. If the seeds or roots are directly contacted, it is easy to burn seeds and burn seedlings; if it is used improperly, it will cause greediness and lodging. Excerpted from China Agricultural Press>