| To explore the effect of tillage synergistic materials addition on soil barrier reduction and crop yield in cultivated sodic\|saline soil, a field experiment was used with nine treatments of control treatment (CK), subsoiling with desulfurization gypsum(SG), subsoiling with humic acid (SF), subsoiling with compound conditioner (ST), subsoiling with compound conditioner and humic acid (STF), fenlong with desulfurization gypsum treatment (FG), smash\|ridging with humic acid (FF), smash\|ridging with compound conditioner (FT), and smash\|ridging with compound conditioner and humic acid treatment (FTF). The application rates of desulfurization gypsum, compound conditioner and humic acid were 15 000 kg·hm-2, 22 500 kg·hm-2 and 6 000 kg·hm-2. The results showed that compared with CK, in the 0~40 cm, the soil bulk density of tillage synergistic materials addition treatment decreased by 2.7%~18.4%, soil total porosity increased by 3.8%~25.3%, and soil three phase ratio improved. Compared with CK, the addition of tillage synergistic materials reduced soil pH, sodium adsorption ratio (SAR) and total alkalinity in 0~40 cm soil layer by 6.8%~21.3%, 20.7%~78.3% and 17.1%~47.7%, respectively. In 0~40 cm soil layer, tillage synergistic materials addition increased soil organic matter by 2.5%~63.9%. Compared with CK, the row number per ear, grain number per row and theoretical yield of maize increased by 4.8%~10.1%, 8.9%~22.0% and 9.8%~37.6%, respectively. Comprehensive improvement effect and crop yield effect analysis indicated that the 40 cm smash\|ridging with compound conditioner 22 500 kg·hm-2 and humic acid 6 000 kg·hm-2 had the best effect. |