摘要
The issue of grain security in China is attracting global attention. In this research, we analyze the relationship between grain production and cropland resources. The results indicate that decoupling of these two variables is realized at the national level, and fertilizer and irrigation play increasingly important roles in grain production. Of the 18 principal grain producing provinces, seven showed absolute decoupling, three showed relative decoupling, five showed quasi-relative decoupling, and three provinces showed coupling. Also, the relative importance of fertilizer and irrigation in grain production is different among the four different modes of coupling/decoupling.
The issue of grain security in China is attracting global attention. In this research, we analyze the relationship between grain production and cropland resources. The results indicate that decoupling of these two variables is realized at the national level, and fertilizer and irrigation play increasingly important roles in grain production. Of the 18 principal grain producing provinces, seven showed absolute decoupling, three showed relative decoupling, five showed quasi-relative decoupling, and three provinces showed coupling. Also, the relative importance of fertilizer and irrigation in grain production is different among the four different modes of coupling/decoupling.
基金
supported by the State Scholarship Fund of China
the National Science Foundation (DEB-0238121)
