1. School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255000, China; 2. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, Shandong 255000, China
Abstract：In order to rationally used brackish water resources and biochar improver, on the basis of water saving, the water-salt transport of brackish water under the action of biochar was studied. Indoor one-dimensional vertical infiltration test was made to study the moderate saline-alkali soil in the Yellow River Delta. The experiment included eight treatments: CK,W1,W2,W3,C1,W1C,W2C,W3C. Results show that migration depth of wetting front and the cumulative infiltration increased first and then decreased with the increase of salinity of brackish water. The infiltration performance of soil with biochar was better than that without biochar, the increase rate was 2.16%-8.54%, W2C was the best, and W1C was slightly less than W2C. The Kostiakov model could better describe the soil water infiltration process. After the infiltration experiment, the moisture content of 0—20 cm soil increased first and then decreased with the increase of salinity of brackish water, the moisture content of soil with biochar was better than that without biochar, the increase rate is 2.53%-3.95%, W2C was the best, W1C was slightly less than W2C. The soil salt content added with biochar increased with the increase of salinity of brackish water, the desalination effect of biochar treatments was better than that without biochar, and the desalting effect of 2 g/L brackish water was significant, up to 47.4%.It is recommended to add biochar to the moderate saline-alkali soil in the Yellow Delta and irrigate it with 2 g/L brackish water.
王世斌,高佩玲*,赵亚东,相龙康,孟庆梅,牛晓音. 微咸水对生物炭作用下盐碱土水盐运移特征影响[J]. 排灌机械工程学报, 2022, 40(2): 181-187.
WANG Shibin,GAO Peiling*,ZHAO Yadong,XIANG Longkang,MENG Qingmei,NIU Xiaoyin. Effects of mineralization of brackish water on water-salt transport characteristics of saline-alkali soil supplemented with biochar. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(2): 181-187.
