Phosphorus(P)fertilization is essential for winter oilseed rape(Brassica napus L.)especially in the intensive cropping systems.To evaluate the yield response to P fertilization and economic optimum P rate(EOPR)under different levels of soil indigenous P supply(IPS),we collected 1437 site-year experiments with four P application rates at the regional scale in Yangtze River Basin,with large yield range of 665-4470 kg ha-1.