Abstract: With the improvement of the standards in point-source pollution control, the issues of non-point source (NPS) pollution become increasingly prominent. Agricultural NPS pollution, due to its wide coverage, difficulty to control, and large amounts of uncertainties in simulation, has become a hot spot in recent studies of water environment pollution control. Aiming at the uncertainties in agricultural NPS pollution simulation, this paper introduced the commonly used agricultural NPS pollution models and their uncertainty sources, with the focus on the research methods of model structure, related parameters, and input uncertainties as well as the advances in the applications of NPS pollution uncertainty research. It was suggested that in future studies, more attention should be paid on the quantitative analysis of the uncertainties of NPS pollution and on the key factors affecting the simulation of NPS pollution load, which could help to the prevention and management of agricultural NPS pollution, the improvement of related researches, and the formulation of effective measures for agricultural NPS pollution control.

Key words: Poplars, New clones, Introduction, Selection