A fertilizer blend containing 10 wt. % to 90 wt. % of a first particulate fertilizer composition and 10 wt. % to 90 wt. % of a second particulate fertilizer composition is disclosed. In the fertilizer blend, the second particulate fertilizer composition can be blended with the first particulate fertilizer composition. The first particulate fertilizer composition can include a core containing a binder, a pH buffering agent, and an urease inhibitor, and a shell containing urea, where the shell covers at least a portion of an outer surface of the core.

The present invention relates to the technical field of fertilizer and soil conditioner production, and particularly to a regulating solution, fertilizer and soil conditioner for increasing Vitamin C (abbreviated as Vc, which is also known as ascorbic acid) content of plants as well as a preparation method therefor and application thereof. At the same time, the present invention also relates to a resource utilization technique of wasted liquid in the industrial production of vitamin C. The regulating solution is obtained by regulating the pH value of a wasted gulonic acid mother solution (a residue after evaporation of fermentation liquid from vitamin C industry) or/and 2-keto-L-gulonic acid solution by an alkaline solution, wherein a fertilizer regulating solution is obtained by regulating the pH value of the regulating solution to 3.0-9.0; and a soil conditioner regulating solution is obtained by regulating the pH value of the regulating solution to 2.0-10.0. The regulating solution obtained by the present invention and the fertilizer and soil conditioner prepared by using the regulating solution as a raw material can significantly increase Vc content of plants, and the effect can be found in all plants tested.

The present invention relates to the technical field of fertilizer and soil conditioner production, and particularly to a regulating solution, fertilizer and soil conditioner for increasing Vitamin C (abbreviated as Vc, which is also known as ascorbic acid) content of plants as well as a preparation method therefor and application thereof. At the same time, the present invention also relates to a resource utilization technique of wasted liquid in the industrial production of vitamin C. The regulating solution is obtained by regulating the pH value of a wasted gulonic acid mother solution (a residue after evaporation of fermentation liquid from vitamin C industry) or/and 2-keto-L-gulonic acid solution by an alkaline solution, wherein a fertilizer regulating solution is obtained by regulating the pH value of the regulating solution to 3.0-9.0; and a soil conditioner regulating solution is obtained by regulating the pH value of the regulating solution to 2.0-10.0. The regulating solution obtained by the present invention and the fertilizer and soil conditioner prepared by using the regulating solution as a raw material can significantly increase Vc content of plants, and the effect can be found in all plants tested.

A system for coating fertilizer substrates is provided. The system comprises a mixing unit wherein the mixing unit comprises a container bowl having an inlet portion and an outlet portion wherein the inlet portion is operatively fastened to a hot air conduit having a blowing unit connected at one end. The invention also relates to a process for coating fertilizer substrates and the coated substrates thereof.

A composition containing diaminomethanal complexes with C.sub.1 to C.sub.3 carboxylic acids. The composition can be made into a solution by adding water. The solution can be applied to plants and/or soil.

A fluidized bed cooler for cooling a urea-containing granular material may include a cooler chamber having a product inlet opening, a product outlet opening, a perforated plate disposed in the cooler chamber, and at least one cooling medium entry opening disposed beneath the perforated plate. The product inlet opening may be disposed above the perforated plate, and a baffle plate may be disposed between the product inlet opening and the perforated plate. A distributor plate may be disposed between the baffle plate and the perforated plate. An area of the distributor plate may be 10% to 50% greater than an area of the baffle plate.

A fertilizer granule containing a core containing a nitrogen containing fertilizer such as urea and a coat on the core, the coat containing an organic zinc (Zn) complex and an inorganic Zn compound, and methods of making and using the fertilizer granule.

A use of 1,9-decanediol in inhibiting ammonia volatilization from soil is provided. It is found that 1,9-decanediol has dual regulation effects, not only significantly inhibiting ammonia volatilization from soil, but also effectively inhibiting nitrification process, which plays synergistic effects. As a fat-soluble substance, 1,9-decanediol has high stability in soil and is not easy to be separated from nitrogen fertilizer. 1,9-decanediol, as a plant root exudate, also has advantages of being green, safe, and pollution-free, which provides a new method and an idea to expand an application field of 1,9-decanediol and improve an industrial application value of 1,9-decanediol.

A use of 1,9-decanediol in inhibiting ammonia volatilization from soil is provided. It is found that 1,9-decanediol has dual regulation effects, not only significantly inhibiting ammonia volatilization from soil, but also effectively inhibiting nitrification process, which plays synergistic effects. As a fat-soluble substance, 1,9-decanediol has high stability in soil and is not easy to be separated from nitrogen fertilizer. 1,9-decanediol, as a plant root exudate, also has advantages of being green, safe, and pollution-free, which provides a new method and an idea to expand an application field of 1,9-decanediol and improve an industrial application value of 1,9-decanediol.

Animal waste contains most of the essential nutrients required for plant growth. However, animal waste also contains microbes that convert urea to ammonium ions, nitrification of the ammonium ions to NO2 and NO3 and denitrification of NO.sub.2 or NO.sub.3 to N.sub.2. N.sub.2O is produced as an intermediate of nitrification and denitrification processes and N.sub.2O is a 300 times more potent greenhouse gas than CO.sub.2. The instant invention discloses low-cost, fluid suspension compositions comprising a combination of urease, nitrification and denitrification inhibitors that decrease the loss of nitrogen from animal waste and lessen the biological formation of the greenhouse gas N.sub.2O. These compositions comprise nitrogenous phosphoryl compounds and nitrification inhibitors that utilize manufacturing processes for the formation of low cost, fluid suspensions comprising one or more inhibitor particles selected from the group consisting of urease inhibitor particles, b) nitrification inhibitor particles, and c) fused particles.