Ammonium phosphate sulfate slow release fertilizer for improving soil structure of saline-alkali soil and preparation method of ammonium phosphate sulfate slow release fertilizer

• Main Authors: WU YOULI, HAN CHAOYING, XIANG SHUANGLONG, HE RUNLIN, XU LIQIN, TANG LIJUN, WANG CAIYAN, LIAO JIXING, LUO FULANG, HE HUA
• Format: Patent
• Language: Chinese; English
• Published: 07.09.2018
• Subjects: CHEMISTRY; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS

The invention relates to the technical fields of fertilizers and processing techniques of the fertilizers and particularly relates to an ammonium phosphate sulfate slow release fertilizer for improving the soil structure of saline-alkali soil and a preparation method of the ammonium phosphate sulfate slow release fertilizer. According to the preparation method, liquid-state elemental sulfur is uniformly distributed into diammonium phosphate with a neutralization degree of 1.3-1.4 until the sulfur content of diammonium phosphate is 8%-13%, so that the pH value and EC value of soil are decreased, the secondary salinization of soil is prevented, and the phosphorus availability of soil is improved; the fertilizer is prepared by virtue of diatomite, so that the utilization rate of air nitrogenis increased; the sustained release of an ammonium phosphate finished product is realized, so that the utilization rates of nitrogen and phosphorus are increased; and meanwhile, the diatomite has adsorbability and is capable