| 丁奠元,赵英,方圆,冯浩.活性炭对农田土壤孔隙结构的影响[J].干旱地区农业研究,2018,36(1):36~42 |
| 活性炭对农田土壤孔隙结构的影响 |
| Effect of addition of activated carbon on soil pore structure |
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| DOI：10.7606/j.issn.1000-7601.2018.01.05 |
| 中文关键词: 活性炭 土壤孔隙结构 双指数土壤水分特征曲线模型 毛管孔隙 非毛管孔隙 |
| 英文关键词:activated carbon soil pore structure double-exponential water retention equation soil capillary pore soil non-capillary pore |
| 基金项目:国家863计划项目（2013AA102904）；黄土高原土壤侵蚀与旱地农业国家重点实验室主任基金（K318009902-1427）；“111”项目（B12007） |
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| 中文摘要: |
| 分析了农田土壤中施用不同用量活性炭（活性炭用量分别占土壤质量的0、0.1%、0.3%、0.6%、0.9%和1.2%）对土壤总孔隙的影响，及其随着时间（0、30、60 d和90 d）的变化；利用DE双指数模型计算了土壤毛管度和非毛管孔隙度，定量评价了活性炭对土壤不同大小等级孔隙状况的影响。结果表明：活性炭对土壤的毛管孔隙影响不大，主要增加了土壤的非毛管孔隙，培养90 d时，相比对照处理，活性炭处理（从低到高）的土壤非毛管孔隙度分别增加5.8%、2.5%、8.7%、9.1%和14.7%；活性炭处理减小了土壤容重，增大了土壤总孔隙度，培养90 d时，活性炭处理（从低到高）的总孔隙度比对照处理分别增加1.9%、1.8%、2.3%、2.7%和4.3%；活性炭处理显著减小了土壤毛管孔隙孔径（P<0.05），而显著增大了土壤非毛管孔隙孔径（P<0.05）。活性炭对土壤孔隙的影响随着时间的延长越来越明显，这可能主要与活性炭自身特性和添加活性炭所引起的有机质和微生物变化有关。 |
| 英文摘要: |
| Addition of organic materials into soil can improve soil structure. The objective of this study is to investigate the effects of activated carbon on the soil pore structure. In the treatments of different amounts of activated carbon (the percentage of soil weight 0%, 0.1%, 0.3%, 0.6%, 0.9% and 1.2%) and durations of incubation (0, 30, 60, 90 d), we measured the soil total porosity, capillary porosity, and no-capillary porosity using the double-exponential water retention equation. Results showed that activated carbon insignificantly affected soil capillary porosity but significantly increased the soil no-capillary porosity, compared with the control treatment after 90 d, the soil no-capillary porosity of the activated carbon treatments (from low to high)increased 5.8%, 2.5%, 8.7%, 9.1% and 14.7%, respectively. Activated carbon decreased soil bulk density and increased soil total porosity, compared with the control treatment after 90 d, the soil total porosity of the activated carbon treatments (from low to high) increased 1.9%、1.8%、2.3%、2.7% and 4.3%, respectively. The activated carbon significantly decreased the radii of soil capillary pores and increased the radii of soil no-capillary pores. The activated carbon may change the composition of soil organic matters and the activity of soil microorganisms, so the effects of activated carbon on the soil pore structure became more obvious over time. These findings may serve as theoretical basis for the use of activated carbon to improve soil structure. |
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