黄土高原生态系统服务供需关系的时空变化

赵雪雁, 马平易, 李文青, 杜昱璇

Spatiotemporal changes of supply and demand relationships of ecosystem services in the Loess Plateau

ZHAO Xueyan, MA Pingyi, LI Wenqing, DU Yuxuan

图2 1990—2018年黄土高原粮食供给量与需求量变化趋势

Fig. 2 Trends of crop supply and demand in the Loess Plateau from 1990 to 2018