Runoff Losses in Nitrogen and Phosphorus From Paddy and Maize Cropping Systems: A Field Study in Dongjiang Basin, South China.

ABSTRACT: Surface runoff is one of the predominant routes for agricultural nitrogen (N) and phosphorus (P) losses, yet their characteristics and corresponding control measures are not fully understood. In 2019 and 2020, field-scale plot experiments were performed at Dongjiang Basin in South China to investigate the characteristics of N and P runoff losses from paddy and maize cropping systems. The results showed that N and P losses from maize fields via surface runoff (27.85 and 1.24 kg ha^-1 year^-1) were significantly higher than those from paddy fields (15.37 and 0.8 kg ha^-1 year^-1). The main forms of N losses were nitrate ( NO3- -N) and ammonium ( NH4+ -N) in paddy and maize fields, respectively, whereas particulate P form predominated in surface

SUBMITTER: Zeng F 

PROVIDER: S-EPMC8384078 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature