Abstract: During the last 15 years, the Department of Irrigation and Drainage of China Institute of Water Resources and Hydropower Research (IWHR) conducted extensive studies on the precise management and regulation of water and fertilizers to meet the development needs of intensive and precision irrigated agricul-ture. These studies mainly focus on the water and fertilizer management for different scale fields in differ-ent ecological regions as well as regulation across multiple processes. The main findings were highlighted in this paper. The standards of micro irrigation uniformity were studied with respect to many aspects of water and solute dynamics, environmental effects, and crop yield and quality under a wide range of environments from arid to subhumid climates for typical wheat, cotton, maize and vegetable crops. As a result, new tar-get uniformity values have been recommended. The design principles and methods of drip irrigation system were updated, considering the spatial variability of soil properties along vertical and lateral directions. We initiated the studies of variable rate irrigation (VRI) to make this new technology adapt to the water limit-ed environments. Many efforts have been made to improve the performance of low-pressure emitters, land-scape sprinklers and fertilizer injectors. Typical efficient use modes of water and fertilizers were established in different regions to aid the extension of sprinkler and microirrigation technologies. These results have greatly contributed to updating the knowledge on water and fertilizer management and increasing water and fertilizer efficiency of sprinkler and microirrigation.

Keywords：irrigation；fertigation；precise regulating；variable rate irrigation；sewage effluent

(Journal of China Institute of Water Resources and Hydropower Research, Vol. 16, No. 5, 2018)