Abstract: Four research aspects of agricultural non-point source pollution at home and abroad,i.e., mechanism of occurence, expansion and transformation; impact on water environment; modelling;and control and management are reviewed.Their development tendency is also discussed. Based on analysis of the current situation the ways of research suitable to actual condition in China are proposed.

Key words: Populus ×, euramericana cv. ‘Neva’, drought stress, basal diameter, seedling height, chlorophyll fluorescence, active oxygen metabolism.