[1]SHI Yakun,ZENG Yi,GUO Jinjin,et al.Effect of the New Phase of the Grain for Green Program on Grain Output on the Loess Plateau[J].Research of Soil and Water Conservation,2022,29(03):419-425.
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Effect of the New Phase of the Grain for Green Program on Grain Output on the Loess Plateau
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 03
Page number:
419-425
Column:
Public date:
2022-04-20
- Title:
- Effect of the New Phase of the Grain for Green Program on Grain Output on the Loess Plateau
- Keywords:
- Grain for Green Program; food security; sustainable vegetation restoration; sloping cropland; scenario analysis
- CLC:
- F326.11; F326.2
- DOI:
- -
- Abstract:
- China is actively achieving the 2030 sustainable development goals, including using only 7% of the world's agricultural land to stop 22% of the world's population from going hungry and carrying out a number of national vegetation restoration projects to control climate change. However, the reduction of cropland caused by vegetation restoration may threaten food security, which may lead China to face challenges about the uncertain impact of large-scale vegetation restoration on regional food security. We analyzed the spatial distribution characteristics of sloping cropland and its influencing factors on the Loess Plateau, and to predict regional food security under different vegetation restoration scenarios by using spatial statistics and scenario analysis. The results show that the cropland with slope >20°still widely distributes in the Loess Plateau, accounting for about 13% of the total area of sloping cropland; the cropland with slope>20°mainly concentrates in the loess hilly and gully region, which is significantly affected by the level of regional economic development; compared with the first phase of the Grain for Green Program, the grain self-sufficiency index under all vegetation restoration scenarios of the new phase of the Grain for Green Program has no downward trend, and can gradually reach 0.90. For this region, Further returning cropland with slopes >20° will be considered to achieve better functions of soil and water conservation and carbon sequestration. However, attention should be paid to the negative impact of insufficient regional food supply caused by vegetation restoration, especially the phenomenon of re-cultivate on restored land. Regional food security and sustainable ecological restoration can be ensured through more detailed planning.
- References:
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Last Update:
2022-04-20