| 吴畏,高佩玲,郭祥林,吕庆鑫,张雪,李孟钊,王世斌.微咸水与生物炭协同作用对盐碱土入渗特征及水盐运移的影响[J].干旱地区农业研究,2023,(2):160~167 |
| 微咸水与生物炭协同作用对盐碱土入渗特征及水盐运移的影响 |
| Effects of synergism of brackish water and biochar on infiltration characteristics and water\|salt migration in saline\|alkali soil |
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| DOI：10.7606/j.issn.1000-7601.2023.02.18 |
| 中文关键词: 盐碱土 微咸水 生物炭 土壤水盐运移 水分入渗模型 |
| 英文关键词:saline\|alkali soil brackish water biochar soil water and salt transport water infiltration model |
| 基金项目:山东省自然科学基金（ZR2020ME251） |
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| 中文摘要: |
| 为研究添加生物炭条件下微咸水矿化度对盐碱土水盐运移的影响，采用一维垂直土柱入渗试验，研究了微咸水灌溉并施用生物炭对盐碱土水盐运移特征及其对Philip和一维代数入渗模型参数的影响，并对入渗模型的适用性进行了评价。本研究设置淡水对照CK（0 g·L-1）及4种微咸水矿化度水平（2、3、4、5 g·L-1）与施用玉米秸秆生物炭（5 t·hm-2）组合试验方案。结果表明：使用微咸水灌溉或施用生物炭均会增加土壤水分入渗速率及土壤含水率，提高土壤保水能力，且微咸水和生物炭协同作用下效果更好。灌溉微咸水并施用生物炭降低了土壤含盐量，在0~30 cm深度内的平均含盐量比初始含盐量降低了34.75%~74.00%，具有良好的盐分淋洗效果。Philip入渗模型能够较好模拟微咸水和生物炭协同作用下的土壤水分入渗情况，灌溉微咸水或施用生物炭会使吸渗率S增加，且两者结合使用时S增幅更大；由代数模型计算而得的土壤各层理论含水率值与实测值之间的平均绝对误差与均方根误差均小于2.2%，表现出一维代数模型较好的适用性。综上所述，使用微咸水灌溉并配施生物炭是改善黄河三角洲地区中度盐碱土入渗性能和水盐分布状况的较好方案。 |
| 英文摘要: |
| This study used the one\|dimensional vertical soil column infiltration experiment to investigate the water\|salt transport characteristics of saline soils with brackish water irrigation and biochar application and their effects on the parameters of Philip and one\|dimensional algebraic models, and the applicability of infiltration model was evaluated. The treatments of freshwater control (0 g·L-1) and four brackish water mineralization levels (2, 3, 4, 5 g·L-1) combining with the application of corn stover biochar (5 t·hm-2) were set up. The results showed that the use of brackish water irrigation or biochar application increased soil water infiltration rate and soil water content, and improved soil water retention capacity. The effect was better under the synergistic effect of brackish water and biochar. Irrigation with brackish water and application of biochar reduced the soil salinity, and the average salinity within 0~30 cm depth was reduced by 34.75%~74.00% compared with the initial salinity, with good salt leaching effect. The Philip infiltration model simulated better the soil water infiltration under the synergistic effect of brackish water and biochar, with irrigation of brackish water or biochar application increasing the infiltration rate S, and the increase in S was greater when the two are combined. The mean absolute error and root mean square error between the theoretical and measured moisture content values of the soil layers calculated by the algebraic model were less than 2.2%, demonstrating the good applicability of the one\|dimensional algebraic model. In conclusion, the use of brackish water irrigation with biochar application was a better solution for improving moderately saline soils in the Yellow River Delta region. |
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