SRN series special Urea Formaldehyde Slow-Releasing CompoundFertilizer is with urea formaldehyde at the core, which is ourenterprise manufactured and exported core slow-releasing nitrogenfertilizer, combined with crops’requirements of nutrient duringthe growing perios, designed scientific formulation, variousnutrient elements through mixing, granulation, drying, sieving,formed granular urea formaldehyde compound fertilizer. It isspecialized use for crops’base fertilizer, and it can improve theutilization rate of fertilizer, decrease the times offertilization, and ultimately achieve that fertilization only forone time can satisfy the crop nutrient requirements for wholegrowing period. Among them: nitrate nitrogen, ammonium nitrogen,urine nitrogen can provide crop’s early growth need of availablenitrogen, urea formaldehyde (UF/MU) provide middle and late neednitrogen.

Compared with soluble fertilizer, Urea Formaldehyde itselfconsists of water soluble parts and water insoluble parts, itwill release nitrogen in soil under moisture, urease,temperature, etc. working together. Due to the release speed ofnitrogen depends on water insoluble parts, made it possible tocontrol the release of fertilizer artificially. But UreaFormaldehyde release of nitrogen is relatively slow, thus UreaFormaldehyde is generally not used separately. They always usedin the compound fertilizer containing dissolved nitrogen sourcesof rapid release and phosphorus, potassium. The fast releasenitrogen supplies corresponding nutrient in early growingperiods, and Urea Formaldehyde gives and effect to prolong theefficiency. The result of mixing dissolved nitrogen and UreaFormaldehyde is to obtain uniform the nitrogenous fertilizer,which can lengthen the releasing time, and pledge enough nitrogenfor a long period.

The Urea Formaldehyde above supplies by granulated or thepowdery. The granulated product’s grain size range is 1-4 mm, maydirectly mix with other fertilizers for use, the granular canprevent the dust, comparing with other types of fertilizer, evenif the granularity reduces, also cannot influence the releasespeed greatly. The powdery product 100% sieves through 60 mesh,suits very much on the fertilizer applicator, and can use inmaking granulation craft to obtain the complex fertilizer whichcontains difficult nutrient content.