Dynamics and Determinants of the Grain Yield Gap in Major Grain-Producing Areas: A Case Study in Hunan Province, China.

ABSTRACT: Understanding the dynamics of the grain yield gap (YGAP) and its causative factors is essential for optimizing the layout of grain production and addressing the food crisis, especially in countries with a huge population and less cultivated land, such as China. In the study, a spatial analysis- and machine learning-based framework for YGAP analysis was developed, taking Hunan Province, China, as an application. The results showed that the average YGAP in Hunan Province gradually narrowed from 1990 to 2018, and the YGAPs narrowed in 116 counties. Of which, 26 counties narrowed by more than 4 t ha^-1, 58 counties narrowed from 2-4 t ha^-1, and 32 counties narrowed within 2 t ha^-1. Additionally, we found that the GDP per capita

SUBMITTER: Yu 

PROVIDER: S-EPMC9024450 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature