| Effects of different improvers on water and salt migration in saline\|alkali soil |
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| DOI：10.7606/j.issn.1000-7601.2020.06.25 |
| Key Words: moderately saline\|alkali soil mixed sand mixed biochar soil water and salt migration one\|dimensional algebraic model |
| Author Name | Affiliation | | LIU Yue | School of Resources and Environmental Engineering, Shandong University of Science and Technology, Zibo, Shandong 255000, China | | LI Mengzhao | School of Resources and Environmental Engineering, Shandong University of Science and Technology, Zibo, Shandong 255000, China | | XU Zhijie | School of Resources and Environmental Engineering, Shandong University of Science and Technology, Zibo, Shandong 255000, China | | MA Xiaowei | School of Resources and Environmental Engineering, Shandong University of Science and Technology, Zibo, Shandong 255000, China | | SONG Yiyi | School of Resources and Environmental Engineering, Shandong University of Science and Technology, Zibo, Shandong 255000, China | | ZHANG Jinpeng | School of Resources and Environmental Engineering, Shandong University of Science and Technology, Zibo, Shandong 255000, China | | WANG Shibin | College of Agricultural Engineering and Food Science, Shandong University of Science and Technology, Zibo, Shandong 255000, China | | GAO Peiling | School of Resources and Environmental Engineering, Shandong University of Science and Technology, Zibo, Shandong 255000, China
College of Agricultural Engineering and Food Science, Shandong University of Science and Technology, Zibo, Shandong 255000, China |
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| Abstract: |
| In order to explore the effects of surface (0~20 cm) sand\|mixing and biochar treatment on saline\|alkali soil improvement in the Yellow River Delta region, vertical one\|dimensional water infiltration experiment was carried out indoors to study the effects of physical improvement method and biological improvement method on soil water infiltration, soil profile moisture content and salt content. Test for moderate saline\|alkali soil (salt content 2.381 g·kg-1), the test set to CK (mixed sand or biochar 0%), S1 (mixed sand 5%）, S2 (mixed sand 10%), S3 (mixed sand 20%), C1 (mixed biochar 0.5%), C2 (mixed biochar 1%), C3 (mixed biochar 2%). The results showed that under the condition of same infiltration, surface (0~20 cm) mixed sand, biochar could improve the effect of salinization of soil moisture infiltration, mixed with biochar increased significantly the aded a layer of water storage capacity, mixing sand significantly increased under sand mixing layer. Soil moisture content in the soil of the 20~40 cm, mixed sand treatment increased by 1.37% than of mixed biochar treatment; Under the treatment of different modifiers, the addition of sand was more beneficial to the desalination of salinized soil. The average desalination rate of the 20% sediment treatment was 5.26%~13.80% higher than that of the biochar treatment, the depth of the desalination area was increased by 2.35%~3.92%, and the depth of the standard desalination area was increased by 1.70%~3.00%. According to the indoor one\|dimensional vertical water infiltration test results of river sediment and biochar, the soil surface sediment mixing sand can effectively solved the problem of salinized soil in the Yellow River Delta Region, improved the distribution of soil water and salt, and provided a good environment for crop growth. |
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