Based on the studies of the mechanisms of specially strong fixation of P in the soils in Leizhou Peninsula, high efficient phosphoric fertilizers were made by using the modified industrial and agricultural wastes as activated agents to activate ground phosphate rock.

This paper is based on the ion exchange reaction between potash feldspar and phosphorite in the phosphoric acid environment, NPK compound fertilizer and slow-released phosphate is produced by the production of the ion exchange reaction.

And study the nitrogenous fertilizer response trial, phosphorous fertilizer response trial, potassium fertilizer response trial and nitrogen, phosphorous, potassium nutrition balance separately.