Method of improving nutrient preserving capability of planting concrete

The invention discloses a method of improving nutrient preserving capability of planting concrete. The method is as follows: mixing a granular fertilizer used as fine aggregate into concrete, packaging a cement slurry on a fertilizer surface layer in a mixing process to form a fertilizer efficiency controlled-release shell. The concrete comprises the following components in percentage by weight: 10.0%-20.0% of cement, 60.0%-90.0% of coarse aggregate, 1.0%-8.0% of fertilizer, 0.1%-0.3% of water reducer, 0.05%-0.15% of retarder and 2.0%-5.0% of water. The method provided by the invention can be used for realizing purpose of controlled release of fertilizer efficiency, and improving the nutrient preserving capability of the concrete; after the fertilizer is released in a controlled manner, the porosity of the planting concrete is increased to provide more space for development of a plant root system; moreover, raw materials are easily available and the process is simple.