Patents Assigned to Zhengzhou Centre of Popularization & Research on Zhengzhou Luxuriance Phosphate & Compound Fertilizer
  • Controlled release fertilizer and preparations thereof
    Patent number: 5849060
    Abstract: The present invention relates to a controlled release fertilizer having water-soluble fertilizers as nucleus and limited-soluble plant nutrient compounds as coating layers, characterized in that more than two coating layers of limited-soluble compounds are formed around the nucleus, and that the release rates of the fertilizer can be controlled by regulating the solubilities of the limited-soluble compounds. The invention also relates to a process for preparing the controlled release fertilizer.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: December 15, 1998
    Assignee: Zhengzhou Centre of Popularization & Research on Zhengzhou Luxuriance Phosphate & Compound Fertilizer
    Inventors: Li Diping, Wang Haobin, Xu Xiucheng, Hou Cuihong