Simulation of land transfer process by energy flow model: case of the Taihang Mountain area in Hebei province

Land transfer data at Donggaochang Village in the Taihang Mountains region of Hebei province from 2016 to 2019 were subject to analysis by the ESL(energy system language) model, to simulate and evaluate changes in system energy after land transfer, with attention to land use scenarios and labor inputs． Crop biomass, capital and ecological environment were significantly increased after land transfer． Ten years after land transfer, crop biomass, capital and forest biomass were 12.97 times, 2.10 times and 36.54 times higher respectively than before． Fifty years later, crop biomass, capital and forest biomass increased to 15.34 times, 4.23 times and 39.22 times respectively of these parameters before land transfer． After 100 years, these parameters increased to 26.79, 7.39 and 66.60 times of before． Effect of land transfer on planting structure was average, but effect of adjusted labor input structure on pumpkin biomass and capital after land transfer showed an inverted U-shape． Pumpkin biomass reached a peak in 24 years, capital reached a peak in 48 years． Local labor input increased crop biomass by 46.5%, capital by 212%．