| 引用本文: | 王则玉,马兴旺,李 杨,等.不同酸化生物炭用量对滴灌棉田盐碱土水盐运移的影响[J].灌溉排水学报,2024,43(3):33-38. |
| WANG Zeyu,MA Xingwang,LI Yang,et al.不同酸化生物炭用量对滴灌棉田盐碱土水盐运移的影响[J].灌溉排水学报,2024,43(3):33-38. |
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| 摘要: |
| 【目的】研究不同酸化生物炭用量对滴灌棉田盐碱土水盐运移的影响，确定改良棉田盐碱土的最佳木醋液酸化生物炭用量。【方法】基于一维土柱模拟试验，分别设置1%、2%、3%、4%和5%五个不同质量木醋液酸化生物炭处理（木醋液与生物炭质量比为2∶1），以空白处理作为对照CK1，以添加2%未酸化生物炭处理作为对照CK2，分析不同处理滴灌后湿润峰垂直运移距离、土壤pH值、含盐量、土壤碱化度和脱盐率的分布特征。【结果】添加酸化生物炭处理的土壤湿润峰垂直运移距离和下渗速度均显著高于CK2和CK1；添加酸化生物炭处理下的各层土壤pH值均显著低于CK2和CK1，且施用量越多pH值降幅越大；随着酸化生物炭施用量的增加，各土层土壤碱化度呈先降低后升高的变化趋势，2%酸化生物炭处理下的土壤碱化度降幅最大；添加未酸化生物炭和酸化生物炭处理的0~50 cm各层土壤脱盐率均有所增加，2%酸化生物炭处理下的整体脱盐效果最好。【结论】添加酸化生物炭对盐碱土的改良效果优于添加未酸化生物炭，以2%酸化生物炭用量下的效果最优。 |
| 关键词: 木醋液；生物炭；盐碱土改良；盐分垂直分布 |
| DOI：10.13522/j.cnki.ggps.2023431 |
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| Effects of acidified biochar amendment on water and salt movement in saline-alkali soil in drip-irrigated cotton field |
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WANG Zeyu, MA Xingwang, LI Yang, PU Shenghai, MA Honghong, LIU Xiaoli
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Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
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| Abstract: |
| 【Objective】Acidified biochar has been used as a soil conditioner to improve properties of saline-alkali soils. This paper presents the results of an experimental study on the effect of acidified biochar amendment on water and salt movement in saline-alkali soil. 【Method】Infiltration experiment was conducted using columns repacked with saline-alkali soil taken from a cotton field to the depth of 40 cm. The soil was amended with acidified biochar at a ratio from 1% to 5%. Soils without biochar amendment (CK1) and amended with 2% of non-acidified biochar (CK2) were taken as the control. The movement of wetting front, changes in soil pH, soil salt content, soil alkalinity and soil desalination in each treatment were measured and analyzed.【Result】The pH value of the soil amended with acidified biochar was significantly lower than that of the soil in CK1 and CK2, with pH value decreasing with the increase in acidified biochar application. With acidified biochar application increasing, soil alkalinity decreased first followed by an increase, with soil alkalinity being the least when acidified biochar application ratio was 2%. Soil desalination in the 0-50 cm of soil layer and salt accumulation in the 50-70 cm of soil layer both increased with the increase in application of unacidified biochar and acidified biochar. Overall, soil desalination was the best in soil amended by 2% of acidified biochar.【Conclusion】Amending soils by acidified biochar was more effective to improve the properties of saline-alkali soil than amending with non-acidified biochar. Among all treatments we compared, amending the soil by 2% of acidified biochar was most effective in improving soil properties. |
| Key words: wood vinegar; biochar; improved alkalized soil; salinity vertical distribution |
