Abstract:In order to investigate the effects of zinc fertilizer and lime on the yield and soil nutrient characteristics of double cropping rice, and to propose the best fertilization mode suitable for local soil and rice planting conditions, four fertilization treatments were applied in typical double cropping rice areas in south China: no nitrogen(PK), inorganic fertilizer(NPK), inorganic fertilizer + zinc fertilizer(NPK+Zn), and inorganic fertilizer+lime(NPK+CaO). The indexes of available zinc, alkali-hydrolyzable nitrogen, available phosphorus, pH, yield and nitrogen agronomic efficiency were determined. The results showed as follows : Application of zinc fertilizer(NPK+Zn) increased the actual yield of double cropping rice by 10.3%-56.9% and 7.6%-41.7% in the early and late seasons in 2017, respectively. In 2018,the growth rates in the morning and evening quarters were 17.6%-104.2% and 8.5%-45.2% respectively. NPK+Zn treatment effectively increased the content of soil available nutrients, in which, the content of available phosphorus was 29.2% and 33.3% higher than that of NPK treatment, and the content of available zinc was 25.5% higher than that of NPK treatment, respectively. Compared with NPK and NPK+CaO, NPK+Zn significantly increased the nitrogen agronomic efficiency by 57.3% and 67.1%. In conclusion, applying lime in successive years significantly reduced the available zinc content in soil and was not conducive to rice yield increase. In zn-deficient soil, zinc application could not only improve soil available nutrient content and agronomic utilization rate of rice nitrogen, but also make rice yield higher and stable. The application of zinc fertilizer + inorganic fertilizer was the best fertilization mode.