Abstract: Based on the data of soil physical-chemical characteristics and the temperature during rice growing period in eight representative counties and cities in the southeast coast areas of Fujian Province,the soil capacities of fertilizer supply both for early and late rice were simulated,by using the RCSODS model.The rational rates of fertilizer application were also simulated,according to the local yield targets of the main rice varieties as well as the fertilizer use efficiencies.The results showed that the organic matter content and total amount of nitrogen in rice fields were medium,while the available phosphorus(P) and potassium(K) were deficient in general,as the most of soils in Fujian Province are acidic.In order to reach the target yields at the present level,for the early rice it needs to apply 56.98-231.85 kg N/ha and 73.28-173.57 kg P2O5/ha and 15.41-257.63 kg K2O/ha.For the late rice the fertilization rates were as follows: 64.63-237.93 kg N/ha,88.76-176.72 kg P2O5/ha and 50.41-315.96 kg K2O/ha.In comparison of the actual fertilization rates with the simulated rates,it could be concluded that the actual rates of nitrogen fertilizer application at present in Fujian Province was appropriate,while the rates of phosphate and potassium fertilizers were obviously insufficient.

Key words: Rice, Rice, Rate of fertilization, Coast areas of Southeast China, RCSODS