| 引用本文: | 刘 源,崔二苹,李中阳,等.再生水和养殖废水灌溉下生物质炭和果胶对土壤盐碱化的影响[J].灌溉排水学报,2018,37(6):16-23. |
| LIU Yuan,CUI Erping,LI Zhongyang,et al.再生水和养殖废水灌溉下生物质炭和果胶对土壤盐碱化的影响[J].灌溉排水学报,2018,37(6):16-23. |
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| 摘要: |
| 再生水和养殖废水作为农业灌溉替代水源会对土壤盐碱性产生影响，而生物质炭和果胶由于其对土壤结构和性质的影响而有可能对2种水源灌溉下造成的土壤盐碱化产生调控作用。【目的】揭示再生水和养殖废水灌溉下生物质炭和果胶对土壤盐碱化的影响及其差异性。【方法】利用根箱试验的方法测定了土壤pH值、EC、盐分离子等指标，计算了土壤钠吸附比和碱化度。【结果】与养殖废水灌溉相比，再生水灌溉增加了土壤pH值、EC、盐分、钠吸附比和碱化度，有引发土壤次生盐渍化和碱化的风险。生物质炭和果胶的添加对土壤pH值无显著影响。在蒸馏水和再生水灌溉时生物质炭处理土壤的电导率和盐分与不添加处理无显著差异，但在养殖废水灌溉时生物质炭处理非根际土壤电导率和盐分分别比不添加处理显著增加了34.9%和40.4%。灌溉水源相同时，果胶处理土壤电导率和盐分与不添加处理无显著差异。果胶处理土壤的钠吸附比和碱化度高于生物质炭处理和不添加处理。【结论】生物质炭增加了养殖废水灌溉下土壤发生次生盐渍化的风险，而果胶增加了再生水和养殖废水灌溉下土壤发生碱化的风险。 |
| 关键词: 生物质炭； 果胶； 再生水； 养殖废水； 土壤盐碱化 |
| DOI：10.13522/j.cnki.ggps.2017.0430 |
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| Effects of Irrigating Biochar- and Pectin-amended Soil with Treated Municipal Wastewater and Swine Wastewater on Soil Salinity and Sodicity |
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LIU Yuan, CUI Erping, LI Zhongyang, DU Zhenjie, GAO Feng, FAN Xiangyang
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Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; Agriculture Water and Soil Environmental Field Science Research Station of Xinxiang City of Henan Province of CAAS, Xinxiang 453002, China; Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources of CAAS, Xinxiang 453002, China
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| Abstract: |
| 【Objective】Reusing treated municipal wastewater and livestock-farm wastewater for irrigation can ameliorate the increased water scarcity and curtail their discharge to surface and subsurface watercourse, but inappropriate managements could result in soil salinization and sodification. The purpose of this paper is to experimentally investigate the impact of irrigating biochar- and pectin-amended soils with the aforementioned brackish water on soil qualities. 【Method】 The experiments were conducted in rhizoboxes and the control was without soil amendment. During the experiment, we measured soil pH, electricity conductivity (EC), concentration of typical ions and other indicators, from which the sodium adsorption ratio (SAR) and the exchange sodium percentage (ESP) were calculated. 【Result】 Compared with using swine wastewater, irrigation using treated municipal wastewater increased soil pH, EC, salt content, SAR and ESP, thereby risking secondary salinization and sodification; biochar and pectin addition did not have noticeable impact on soil pH. Compared to the control, biochar amendment did not alter the EC and salt content when irrigated with distilled water or treated domestic water, but led to an increase in EC and salt content by 34.9% and 40.4%, respectively, when irrigated with swine wastewater. Pectin addition did not result in a noticeable change in EC and salt content, but increased the SAR and ESP compared to the control 【Conclusion】 Amending soil with biochar risked secondary soil salinization when irrigating with swine wastewater, while irrigating pectin-amended soil with treated municipal water or swine wastewater risked soil solidification. Irrigation with the above brackish water to soils amended by biochar or pectin should therefore be used with care. |
| Key words: biochar; pectin; reclaimed water; swine wastewater; soil salinization |
