Phosphorus application method for reducing concentration of lead in rice in heavily lead-contaminated rice field

The invention relates to a phosphorus application method for reducing the concentration of lead in rice in heavily lead-contaminated rice field, and belongs to the technical field of agricultural product heavy metal pollution control. The method is concretely characterized in that the total phosphorus application amount (the phosphorus application level is high, and the effective component is P2O5) in the heavily lead-contaminated rice field (the soil Pb concentration is 1000mg/kg and is 3 or more times a nationally limited standard) is 150kg/hm , phosphorus is applied three times, phosphorus accounting for 1/2 of the total phosphorus application amount is applied 3d before rice seedling transplantation, phosphorus accounting for 1/4 of the total phosphorus application amount is applied 20d (tillering fertilizer) after the seedling transplantation, and phosphorus accounting for 1/4 of the total phosphorus application amount is applied 5d (granular fertilizer) before earing. Compared with common one-time medium level phosphorus application methods commonly used in practical rice production, the method provided by the invention decreases the Pb concentration of rice by 63.2-81.9%, and obviously improves the rice output (7.7% increase of hsien rice and 7.4% increase of japonica rice).