| A pot experiment was conducted to study the differences in phosphorus efficiency, root morphology and nitrogen and potassium uptakes, and the correlativity between root morphology and phosphorus efficiency in four corn inbred lines at low and normal phosphorus levels. The results demonstrated that with hilling done, phosphorus efficiency showed a significant and positive correlation with the amount of absorbed phosphorus in corn and this indicated that the genotypes with high uptake efficiency had high phosphorus uptake efficiency under phosphorus deficiency as well as big root size and radiuses. Meantime, phosphorus deficiency also led to lowered uptakes of nitrogen and phosphorus. |