Evaluation of Nitrogen Fertilizer Fates and Related Environmental Risks for Main Cereals in China's Croplands from 2004 to 2018.

ABSTRACT: Assessment of the nitrogen (N) inputs and outputs in croplands would help effectively manage the distribution of N to improve crop growth and environmental sustainability. To better understand the N flow of the main cereal systems in China, soil N balance, N use efficiency (NUE), N losses and the potential environmental impacts of maize, wheat and rice cropping systems were estimated at the regional and national scales from 2004 to 2018. Nationally, the soil N balance (N inputs-N outputs) of maize, wheat, single rice and double rice decreased by 28.8%,13.3%, 30.8% and 34.1% from 2004-2008 to 2014-2018, equivalent to an average of 33.3 to 23.7 kg N ha^-1, 82.4 to 71.4 kg N ha^-1, 93.6 to 64.8 kg N ha^-1 and 51.8 to 34.1 kg N ha^-1, respectively. The h

SUBMITTER: Song D 

PROVIDER: S-EPMC9571694 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature