Fig. 1

Geographic location of saline land in Northwestern China (A). Planting pattern diagram (B): (a) schematic diagram (left) and sample diagram (right) of a H. glomeratus monocropping system; (b) schematic diagram (left) and sample diagram (right) of a S. glauca monocropping system; and (c) schematic diagram (left) and sample diagram (right) of H. glomeratus and S. glauca intercropping system. Seedling growth of Hg, Sg, and Hg||Sg for salt concentration of 0, 50, 100, 150, and 200 mmol·L− 1 (C). Abbreviations: Hg, H. glomeratus monocropping; Sg, S. glauca monocropping; Hg||Sg, H. glomeratus and S. glauca intercropping