| 引用本文: | 王幼奇,包维斌,赵云鹏,等.生物炭添加对淡灰钙土水分入渗过程的影响[J].灌溉排水学报,2018,37(12):60-65. |
| WANG Youqi,BAO Weibin,ZHAO Yunpeng,et al.生物炭添加对淡灰钙土水分入渗过程的影响[J].灌溉排水学报,2018,37(12):60-65. |
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| 摘要: |
| 【目的】改善和提高银川平原土壤蓄水保肥能力和土地生产力。【方法】以银川淡灰钙土为研究对象，采用室内一维垂直定水头法，选取5种生物炭添加比例0%（CK）、2%（B1）、3%（B2）、5%（B3）和6%（B4），研究了湿润锋进程、入渗速率、累积入渗量，比较了Kostiakov模型、Philip模型、Horton模型和通用经验模型对含生物炭土壤水分入渗过程的适用性。【结果】B1、B2、B3和B4处理的初始入渗速率比CK分别减小5%、12%、32%和38%，稳定入渗速率减小30%、39%、44%和48%，即随生物炭量增加土壤水分入渗速率呈逐渐减小的趋势；入渗历时120 min时，B1、B2、B3和B4处理的湿润锋进程比CK分别减少14%、31%、39%和40%，累积入渗量分别减少13%、24%、36%和42%，即随着生物炭量的增加，其对土壤湿润锋进程、累积入渗量抑制作用越强；4种入渗模型中Horton模型最适宜模拟研究区不同生物炭量条件下土壤水分入渗过程。【结论】生物炭添加可以改善淡灰钙土水分损失快、持水性能差的情况，显著提高淡灰钙土保水能力。 |
| 关键词: 生物炭； 入渗速率； 土壤水分； 干旱半干旱区； 模型 |
| DOI：10.13522/j.cnki.ggps.20180089 |
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| Amending Soil by Biochar Reduces the Ability of the Soil to Infiltrate Water |
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WANG Youqi, BAO Weibin, ZHAO Yunpeng, ZHANG Xing, BAI Yiru
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1.College of Resources and Environment, Ningxia University, Yinchuan 750021, China; 2.China-Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Regions, Yinchuan 750021, China
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| Abstract: |
| 【Objective】Biochar has been increasingly used as an agent to improve soil quality but its impact on ability of the soil to conduct water is poorly understood. The aim of this paper is to study changes in water infiltration in soil amended with biochar at different ratios in Yinchuan Plain.【Method】 Light sierozem soil taken from the plain was amended with biochar at ratios of： 0% (CK), 2% (B1), 3% (B2), 5% (B3) and 6% (B4). Each amended soil was then packed into column, followed by infiltration test. During the infiltration process, we measured advance of the wetting front, infiltration rate and cumulative infiltration. The results were analyzed using the Kostiakov model, the Philip model, the Horton model and a general empirical model.【Result】Compared with CK, B1, B2, B3 and B4 reduced the initial infiltration rate by 5%, 12%, 32% and 38% respectively, and the steady infiltration rate by 30%, 39%, 44% and 48% respectively. After 120 min of infiltration, B1, B2, B3 and B4 reduced the wetting front by 14%, 31%, 39% and 40%, and cumulative infiltration by 13%, 24%, 36% and 42%, respectively, compared to CK. Increasing biochar amendment considerably reduced water infiltration. We also found that the Horton model was more accurate than other models to reproduce the infiltration process in all columns.【Conclusion】Amendment with biochar could significantly improve water retention in the light sierozem soil due to reduction in water flow. The practical implications of this, however, would be case-dependent. |
| Key words: soil amendment; biochar; infiltration rate; soil moisture; arid and semiarid area; model |
