Artificial Macropores with Sandy Fillings Enhance Desalinization and Increase Plant Biomass in Two Contrasting Salt-Affected Soils

Salt accumulation in topsoil is a widespread restricting factor that limits agricultural production and threatens food security arid semi-arid regions. However, whether this upward enrichment was suppressed by macropores less documented. Therefore, artificial with sandy fillings (AMSF) method proposed study. Soil column experiments showed significant improvement of saturated hydraulic conductivity (Ks) more than 260% under macropore treatment. Freshwater irrigation conducted to monitor the short-term water salt movement. This research aimed at evaluating potential benefit AMSF on soil desalinization coastal farmland northern China. The results demonstrated downward movement stimulated method, accordingly, washing ions out top rooting zone. Particularly, 10 cm or depth treatments enhanced total 52.1% 176.6% 0–30 layer, comparison control group without macropore. Subsequent observations for alfalfa higher biomass 20.8% 15 depth. here provided an exploration demonstration pursue these studies ultimate goal optimizing application strategies amendment salt-affected lands