Controlled release fertilizer equipment Henan Viet controlled release fertilizer equipment manufacturing equipment research and development of controlled release fertilizer and controlled release fertilizer is the use of polymer-coated fertilizer, fertilizer granulator dual-mode investment, microporous membranes are usually only a few hundred nanometers, liquid The water can not pass through the membrane, microbial fertilizer fertilizer granulator dual-mode, only the water molecules to form into the film, so in addition to water molecules free access to film, fertilizer granules completely and external isolation, dual-mode fertilizer granulator , and nutrient excluded by osmotic membrane outer membrane. Therefore, only the speed of release of nutrients and water molecules velocity and pores of the membrane pores, and when the latter controlled-release fertilizer into the soil (Millipore set), only the speed and movement of water molecules and the water molecules The velocity depends on the temperature. There is no effect of the release of controlled-release fertilizer on soil microbes, PH value, etc. Common soil fertilized fertilizer, pre-fast result due to the release of excess nutrients, plants can not completely absorbed in the short term, resulting in the accumulation of a lot of nutrients in the soil, likely to be volatile, lost under the rain; seep into the ground; or fixed soil, so fertilizer The average utilization rate of only 35%, while the latter lack of nutrients. Controlled release fertilizer nutrients is actually irrelevant to the pre-saving supplies to the plant to get late, while reducing leaching, decomposition and soil microorganisms fixed, the equivalent of a little bit to keep the plants fed fertilizer. Therefore, fertilizer use efficiency can reach about 75%, with the highest near the root can reach more than 80%. Controlled release fertilizers means to slow or control the release rate of new fertilizers. Slow-release fertilizer in a broad sense, including the slow-release fertilizer and controlled release fertilizer two types. "Slow-release" refers to a chemical substance nutrient release rate is far less than instant fertilizers, soil fertilized into an effective state release rate of plant nutrients; "controlled release" refers to a variety of regulatory mechanisms to release the nutrient release according to the set (release rate and release time) and crop nutrient uptake pattern consistent with the law. Therefore, under the biological or chemical action decomposable organic nitrogen compound fertilizer commonly referred to as slow-release fertilizer, while the biological and chemical factors such as insensitive coated fertilizer commonly referred to as controlled release fertilizer. Henan long-acting nitrogen fertilizer equipment fertilizer equipment manufacturing company Viet development of new synthetic organic slow release nitrogen fertilizer equipment mainly a class of long-acting nitrogen fertilizer urea formaldehyde, urea polymer with an aldehyde to produce a poorly water soluble, it is generally in microorganisms By gradually decompose and release ammonia and carbon dioxide. Among them, urea-formaldehyde (codenamed UF) is more mature, in 1955 commodity fertilizers have been sold. Such long-acting nitrogen fertilizer is considered promising are urea isobutyraldehyde (isobutylene diurea, codenamed IBDU), there is merchandise to sell fertilizer. It is suitable for a variety of different soil and climate, the rate of nitrogen release effective with product particle size. Fertilizer has produced more than two months to three years on a variety of urea isobutyraldehyde. Some products made of brick, called super slow-release fertilizer, manure fertilizer granulator dual-mode, can continue to supply nitrogen for 3 to 5 years, can be used for forestry and urban greening. Nitrogen provides nearly 100% effective, there is no residue. Coated fertilizer with sulfur, paraffin, asphalt, plastics and other water-soluble granular fertilizer to put on his coat, so that the slow release nitrogen. One of the most important is the sulfur coated urea, which provides nitrogen and sulfur elements. Our sulfur resources are scarce, the main research using ammonium bicarbonate or calcium magnesium phosphate coated urea slow release nitrogen fertilizer. CAS Nanjing Institute of Soil Science has developed above coated slow release nitrogen fertilizer.