Adaptive conservation of natural resources determines the sustainable livelihood strategies of farmers in the semi-arid Loess Plateau region of China

Livelihood improvement and sustainable natural resource utilization are among the United Nations Sustainable Development Goals; however, most farm households either randomly select or just imitate livelihood strategies being practiced in other areas. As the livelihoods of farm households are vulnerable to several challenges in ecologically fragile areas, identifying the livelihood strategies of farm households in arid and semi-arid areas will help for promoting both livelihood security and environmental conservation. Hence, in this study, we constructed a sustainable evaluation index system for the livelihood of farmers in the Loess Plateau region of China by conducting field research and interviews. We employed the composite index method to measure the livelihood capital and the livelihood strategies chosen by farmers, and then analyzed the resource endowment of farmers under different livelihood strategies using logistic regression and structural equation modeling. The results revealed that under the combined influences of livelihood capital and government policy, farm households in the Loess Plateau region selected agro-dependent, agro-pastoral, agro-industrial, non-agricultural livelihood strategies. The key factors influencing the selection of these household livelihood strategies included the household labor capacity, the farmland owned per household, the number of livestock, and the grassland forage-supply ratio. The grassland forage-supply ratio was a crucial factor influencing the choice between agricultural and non-agricultural livelihood strategies. In this context, the grassland forage-supply ratio increased with the stocking rate. However, once the stocking rate exceeded 56.5 sheep/hm², the grassland forage-supply ratio no longer increased rapidly under the agriculture-based livelihood strategy. The strategy of ecological resource conservation and moderate utilization based on the quality and quantity of natural resources ensures win-win benefits for the environment and human well-being in arid and semi-arid areas. Moderate grazing therefore has the potential to improve farmers’ livelihoods without causing grassland degradation. These results contribute to the synergistic co-adaptation of livelihood improvement and ecological conservation in arid and semi-arid areas.