Slow-release and controlled-release polymer fertilizers containing numerous nutrients and their production and use

摘要

This invention relates to a slow and controlled-release polymeric fertilizer with multiple nutrients having the following general formula : wherein n, m and M are defined in the description. The polymeric fertilizer of this invention is an environment-friendly slow and controlled-release fertilizer. Its slow and controlled release action lies in self-degradation and hydrolysis. This invention also relates to the preparing process for the fertilizer and the use method of the fertilizer in agriculture.