| Cite this article: | 郭祥林,高佩玲,王世斌,等.微咸水灌溉下不同生物炭对盐碱土水盐运移的影响[J].灌溉排水学报,0,():-. |
| GUO Xianglin,GAO Peiling,WANG Shibin,et al.微咸水灌溉下不同生物炭对盐碱土水盐运移的影响[J].灌溉排水学报,0,():-. |
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| Effects of different biochar on water and salt transport in saline-alkaline soil under brackish irrigation |
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GUO Xianglin, GAO Peiling, WANG Shibin, LV Qingxin, WU Wei, LI Mengzhao, ZHANG Xue
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School of Agricultural Engineering and Food Science,Shandong University of Technology
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| Abstract: |
| 【Objective】In order to reasonably develop and utilize brackish water to improve saline-alkaline soils, 【Method】an indoor one-dimensional infiltration experiment was conducted to investigate the effects of mixing wheat/maize straw biochar with brackish water irrigation on water-salt transport and pH in saline soils in the Yellow River Delta. The experiment included ten treatments: CK (Deionized water)、X1 (10 t/hm2 wheat straw biochar)、X2 (20 t/hm2 wheat straw biochar)、Y1 (10 t/hm2 maize straw biochar)、Y2 (20 t/hm2 maize straw biochar)、W (3 g/l brackish water)、WX1、WX2、WY1、WY2. 【Result】The results showed that the addition of biochar under brackish water irrigation improved the infiltration capacity and increased the water retention capacity of the soil, and the infiltration performance and water retention effect of the addition of wheat straw biochar was better than that of the addition of maize straw biochar, with WX1 treatment having the best effect. The salinity of the 0-35 cm soil layer was increased by the treatment of brackish water with biochar compared with CK, but the salinity did not exceed the salt tolerance threshold of the crop and did not produce salt damage, among which WY1 had the best desalination effect with 49.54%, and WX1 was slightly smaller than WY1. The addition of biochar under brackish water irrigation increased soil pH, but was not significantly different from freshwater irrigation, and the soil pH treated with wheat straw biochar was lower than that of maize straw biochar, with WX2 having the best effect and WX1 slightly less than WX2.【Conclusion】In summary, it is recommended that 10t/hm2 of wheat straw biochar be mixed to improve moderately saline soils in the Yellow River Delta region under 3 g/L brackish water irrigation conditions. |
| Key words: brackish water mineralisation; biochar; moderately saline soils; water-salt distribution; pH |
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