Sino-France Institute of Earth Systems Science, Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, PR China.
Published: April 2022
AI Article Synopsis
Article Abstract
Agricultural soils are the largest anthropogenic emission source of nitrous oxide (NO). National agricultural policies have been implemented to increase crop yield and reduce nitrogen (N) losses to the environment. However, it is difficult to effectively quantify crop-specific and regional NO mitigation priorities driven by policies, due to lack of long-term, high-resolution crop-specific activity data, and oversimplified models. Here, we quantify the spatiotemporal changes and key drivers of crop-specific cropland-NO emissions from China between 1980 and 2017, and future NO mitigation potentials, using a linear mixed-effect model and survey-based data set of agricultural management measures. Cropland-NO emissions from China tripled from 102.5 to 315.0 Gg N yr between 1980 and 2017, and decelerated since 1998 mainly driven by country-wide deceleration and decrease in N rate and the changes in sowing structure. About 63% of NO emissions could be reduced in 2050, primarily in the North China Plain and Northeast China Plain; 83% of which is from the production of maize (33%), vegetables (27%), and fruits (23%). The deceleration of NO emissions highlights that policy interventions and agronomy practices (i.e., optimizing N rate and sowing structure) are potential pathways for further ambitious NO mitigation in China and other developing countries.
Herbs rich in secondary metabolites may possess beneficial properties in livestock nutrition and health. 49 Polygonaceae species of European mountain regions were included in a qualitative systematic review based on the methodological framework of the PRISMA statement. 174 relevant publications were identified.
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