| 引用本文: | 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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| 摘要: |
| 【目的】为合理开发利用微咸水改良盐碱地,【方法】以黄河三角洲地区中度盐碱土为研究对象,进行室内一维入渗试验,探讨了在微咸水灌溉基础上掺加小麦/玉米秸秆生物炭对盐碱土水盐运移和pH的影响。试验共设置10个处理：CK(去离子水)、X1(10 t/hm2小麦秸秆生物炭)、X2(20 t/hm2小麦秸秆生物炭)、Y1(10 t/hm2玉米秸秆生物炭)、Y2(20 t/hm2玉米秸秆生物炭)、W(3 g/l微咸水)、WX1、WX2、WY1、WY2。【结果】微咸水灌溉条件下掺加生物炭提高了土壤入渗能力,增加了土壤保水能力,且掺加小麦秸秆生物炭的入渗性能与保水效果优于掺加玉米秸秆生物炭,其中WX1处理效果最优；微咸水配施生物炭处理较CK增加了0-35 cm土层含盐量,但含盐量未超过作物耐盐阈值,不会产生盐害作用,其中WY1处理脱盐效果最优,脱盐率达49.54%,WX1略小于WY1；微咸水灌溉条件下掺加生物炭增加了土壤pH,但与淡水灌溉无明显差异,且经小麦秸秆生物炭处理的土壤pH均低于玉米秸秆生物炭,其中WX2处理效果最好,WX1略小于WX2。【结论】综上考虑,在3 g/L微咸水灌溉条件下,建议掺加10t/hm2的小麦秸秆生物炭改良黄河三角洲地区中度盐碱土。 |
| 关键词: 微咸水矿化度;生物炭;中度盐碱土;水盐分布;pH |
| DOI： |
| 分类号:S278 |
| 基金项目:山东省自然科学基金项目（ZR2020ME251） |
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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 |
