摘要:The application of an acidic biochar can improve plant growth and soil properties in saline conditions. In this study, we investigated the effect of acidic biochar on plant growth and nutrients contents in saline soil. Seven treatments were arranged in a complete randomized design, including control (CK), 0, 30, and 45 g biochar added to a soil having 1% and 1.5% salts; these treatments were termed as B<sub>0</sub>S<sub>1</sub>, B<sub>30</sub>S<sub>1</sub>, B<sub>45</sub>S<sub>1</sub> and B<sub>0</sub>S<sub>1.5</sub>, B<sub>30</sub>S<sub>1.5</sub>, B<sub>45</sub>S<sub>1.</sub><sub>5</sub> respectively. Experimental results showed that the plant height, leaves plant<sup>−1</sup>, leaf area, and shoot fresh and dry biomass, and root fresh and dry biomass were increased for the B<sub>45</sub>S<sub>1.5</sub>, respectively. Similarly, the highest total nitrogen (TN), total phosphorus (TP), total potassium (TK), and total sodium (Na) concentration in maize shoot were observed for B<sub>30</sub>S<sub>1</sub>, B<sub>0</sub>S<sub>1.5</sub>, CK, and B<sub>0</sub>S<sub>1.5</sub>, respectively. The highest concentrations of TN, TP, TK, and Na in root were obtained with the treatments B<sub>0</sub>S<sub>1</sub>, B<sub>0</sub>S<sub>1</sub>, B<sub>45</sub>S<sub>1</sub>, and B<sub>0</sub>S<sub>1</sub>, respectively. Soil pH, and EC decreased and nutrients concentration improved by the addition of acidic biochar. We conclude that the use of acidic biochar can be a potential source for the improvement of maize plant growth as well as mitigate the adverse effect of salt stress.