Specification for the “Three Controls” nutrient management technology for irrigated rice

The technical specification for the "Three Controls" nutrient management technology(TCNM) for irrigated rice was put forward in this paper.The TCNM technology consists of four parts,i.e.the determination of total fertilizer-N input,fertilizer-N timing and split rates at key growth stages,amount and timing of phosphorus and potassium requirement,and adoption of other crop management measures.