The study looked at how fertilization affects the yield of high-yield paddy fields in the middle and lower reaches of the Yangtze River. They examined 19 fields with different cropping systems and management practices in several provinces. The results showed that fields using a double rice system had a yield of about 16,893 kg/hm2, while fields with a rape-rice rotation had a yield of about 13,000 kg/hm2. The best amount of nitrogen, phosphorus, and potassium fertilization for double rice fields was around 461, 130, and 430 kg/hm2, with a ratio of 1:0.28:0.85. For rape-rice rotation fields, the optimal fertilization was about 200, 145, and 250 kg/hm2, with a ratio of 1:0.72:1.23.