Urea formaldehyde(UF/MU)
 At present,our country chemical fertilizer's annual output had achieved 150 million tons, urea occupies above 1/5.After the urea executes into the soil,can decompose and release out nitrogen under the urine enzyme's function.But the urea solubility is big,can drain along with the moisture content in soil; In addition, also a part of urea may adhere to the soil pellet surface layer so that difficult to be absorbed by the crops. Thus, causes the urea's effective availability generally isonly about30%.Therefore,the various countries was trying to find out the method f how to raise the urea use factor.
At the end of 40's last century,the researcher discov-ered the urea and the formaldehyde's condensation product releases the ammonia obviously is lower than the urea, and has carried on the experiment in the American pasture,confirmed this kind of condensation compound has the good fertilizer effectiveness. Thus, many countries then start to take as the slow-releasing chemical fertilizer to conduct the experimental study. In recent years according to the reports from Japan, Germany and so on, this kind of condensation compound also had the functions of promo-ting soil to form the granular structure,guaranteeing the soil moisture, preventing desertification and increasing crops root system penetrating power.At the same time also has characteristic, for example, environmental prote-ction, resources economization, and labor force economi-zation. The composition of formaldehyde urea cannot cause the burn and the leaching loss,can release the majority of nitrogen gradually in the entire growth season, other parts possibly change over to the next growth season.
Compared with soluble fertilizer, urea formaldehyde's release nitrogen speed is slower,but we have to know that most of the urea formaldehyde do not use seperately.They always mix with dissolved nitrogen and mixed ferti-lizer for which has phosphorus and kalium components. The soluble fertilizer provide early period nutrient,me-anwhile,the urea formaldehyde gives and effect to prolong the efficiency.The union of the soluble nitrogenous ferti-lizer and the urea formaldehyde's only result is to btain the nitrogenous fertilizer of which is evenly and can leng-then the releasing time,Pledge enough nitrogen within a certain long period.
Products of UF of our company are produced accord-ing to the quality levels ofU.S.A.and Japan,which reaches the advanced international standards
Out companycanprovide Urea for maldehyde,following is the UF products'specification:
Total nitrogen(TN) |
38-40% |
Water insoluable nitrogen (WIN) |
14-24% |
Urine nitrogen |
3-5% |
Activity index (AI) |
40-70% |
UF(liquid)products speclifications are below: 
Total nitrogen(TN) |
24-28% |
Water-soluble organic nitrogen |
15-18% |
Urine nitrogen |
9% |
 The urea formaldehyde amy supply by granulated or the powdery.the granulated product's grain size range is 1-4mm,may directly mix with other fertilizers for use, the granular can prevent the dusting,compare with other types fertilizer,even if the granularity reduces,also cannot influence the release speed greatly.The powdery product 100%sieves through 60 item,suits very much on the ferti-lizerapplicator,and can use in making granulation craft,It is the complex fertilizer which obtains the different nutrient content. |
