Mathematical model of ammonium nitrogen transport with overland flow on a slope after polyacrylamide application.

ABSTRACT: The nutrient loss caused by soil erosion is the main reason for soil degradation and environmental pollution, and polyacrylamide (PAM) as a common soil amendment has a great influence on runoff and erosion processes at the slope. In order to investigate the mechanism of nutrient transport with runoff, a field experiment was conducted and a simple mathematical model was developed in this study. Four PAM application rates (0, 1, 2, and 4 g·m^-2) and two rainfall intensities (50 and 80 mm·h^-1) were applied in the field experiment. The results revealed that runoff rate of 2 g·m^-2 PAM application treatments decreased by 5.3%-10.6% compared with the control groups, but it increased by10.9%-18.7% at 4 g·m^-2 PAM application treatments. Polyacrylamide appl

SUBMITTER: Ao C 

PROVIDER: S-EPMC5913245 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature