【Objective】This study is the first to make a large-scale assessment of the effect of the application of enhanced efficiency nitrogen fertilizers(EENF) on rice yield and plant N uptake quantitatively to provide a scientific basis for evaluating the economic benefits of EENF and promoting the use of EENF in China.【Method】A total of 48 peer-reviewed studies were collected in Chinese and English books and journals to establish a field experimental database, and a meta-analysis was conducted to quantitatively ev...