Analysis of reclaimed water irrigation research based on China National Knowledge Infrastructure

Reclaimed water irrigation has become an important way to alleviate the shortage of water resources in the world. This study analyzed reclaimed water irrigation research in the China National Knowledge Infrastructure database from 2000-2021 using Excel and SPSS, as well as literature metrology. A qualitative and quantitative analysis of Chinese reclaimed water irrigation research in the past 20 y from the aspects of the number of publications, topics, experimental factors, survey region, and irrigation duration was carried out. The results indicated that there exists a wide dis-crepancy in the development of reclaimed water reuse among the provinces of China. Furthermore, the effects of reclaimed water on soil environments are highly dependent on water quality, while the appropriate irrigation practices still require further study under drought stress. This research will help facilitate understanding of reclaimed water irrigation in China and promote the practice of reclaimed water utilization in the future.