Nutrient controlled-release method based on hydrothermal carbon fertilizer

• Main Authors: MA WENCHAO, WU WENZHU, ZHONG LEI, YAN BEIBEI, CHEN GUANYI, TIAN JINGNAN, SUN YURU, SONG YINGJIN
• Format: Patent
• Language: Chinese; English
• Published: 14.01.2020
• 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 discloses a nutrient controlled-release method based on a hydrothermal carbon fertilizer. The hydrothermal carbon fertilizer is mixed with a hydrochloric acid solution with different concentrations and shaken for different times, after shaking is completed, washing is performed to be neutral, filtration is performed, and after oven-drying is performed, the hydrothermal carbon fertilizer with different nutrient controlled-release effects can be obtained. The method can make the main nutrient nitrogen in the hydrothermal carbon fertilizer be slowly released. At the same time, a controlled-release principle is analyzed, and a nutrient controlled-release equation is established by polynomial model fitting of relevant data based on Matlab-2018b. The method can effectively delay adissolution rate of nitrogen in the hydrothermal carbon fertilizer and improves a nutrient utilization rate. The method has simple operation, low equipment and process requirements, easy industrial production, and broad appli