| 铁矿尾砂配施有机物料对褐土压缩及回弹特性的影响 |
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| 引用本文： | 孙奥博,安晶,虞娜,叶旭红,刘虹豆,邹洪涛,张玉龙.铁矿尾砂配施有机物料对褐土压缩及回弹特性的影响[J].土壤,2022,54(6):1300-1306. |
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| 作者姓名： | 孙奥博 安晶 虞娜 叶旭红 刘虹豆 邹洪涛 张玉龙 |
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| 作者单位： | 沈阳农业大学土地与环境学院/农业农村部东北耕地保育重点实验室/土肥高效利用国家工程研究中心,沈阳农业大学土地与环境学院/农业农村部东北耕地保育重点实验室/土肥高效利用国家工程研究中心,沈阳农业大学土地与环境学院/农业农村部东北耕地保育重点实验室/土肥高效利用国家工程研究中心,沈阳农业大学土地与环境学院/农业农村部东北耕地保育重点实验室/土肥高效利用国家工程研究中心,沈阳农业大学土地与环境学院/农业农村部东北耕地保育重点实验室/土肥高效利用国家工程研究中心,沈阳农业大学土地与环境学院/农业农村部东北耕地保育重点实验室/土肥高效利用国家工程研究中心,沈阳农业大学土地与环境学院/农业农村部东北耕地保育重点实验室/土肥高效利用国家工程研究中心 |
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| 基金项目： | 辽宁省“兴辽英才计划”项目(XLYC1905010)；辽宁省教育厅重点项目(LSNZD202001)；辽宁省重点研发计划项目(2019JH2/10200004)。 |
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| 摘 要： | 铁矿尾砂作为工业废弃物已经应用于农业生产，可以改善土壤结构；农业机械作业造成的土壤压实、破坏土壤结构是影响作物产量的主要原因之一。论文旨在探讨铁矿尾砂配施有机物料对褐土压缩—回弹特性的影响，将混有铁矿尾砂和有机物料的土壤以18%含水率培养一昼夜，按1.25 g/cm3容重装入土工试验专用环刀，采用快速固结试验方法，进行单轴压缩试验。结果表明，随铁矿尾砂施用量增加，在低应力时，土壤孔隙比减小量（?e）变大；在高应力时，土壤 ?e 变小。预固结压力值（Pc）和压缩指数（Cc）均随铁矿尾砂施用量增加而降低，Pc和Cc变化范围分别为72.91～119.30 kPa、0.445～0.720，二者均与有机质含量呈极显著正相关关系；与砂粒含量呈极显著负相关关系（P<0.01）。回弹指数（Cs）变化范围为0.0109～0.0169，与有机质及砂粒含量均无显著相关关系，有机物料是影响土壤回弹指数的主要因素。较对照相比，20%铁矿尾砂配施有机物料处理使压缩指数降低12.77%，预固结压力值和回弹指数分别提高6.93%和22.14%，降低压实风险。
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| 关 键 词： | 土壤压实 土壤孔隙比 预固结压力值 压缩指数 回弹指数 铁矿尾砂 |
| 收稿时间： | 2022/3/1 0:00:00 |
| 修稿时间： | 2022/6/17 0:00:00 |
Effects of Iron Tailings Combined with Organic Materials on Compression and Rebound Characteristics of Cinnamon Soil |
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| SUN Aobo,AN Jing,YU N,YE Xuhong,LIU Hongdou,ZOU Hongtao,ZHANG Yulong.Effects of Iron Tailings Combined with Organic Materials on Compression and Rebound Characteristics of Cinnamon Soil[J].Soils,2022,54(6):1300-1306. |
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| Authors: | SUN Aobo AN Jing YU N YE Xuhong LIU Hongdou ZOU Hongtao ZHANG Yulong |
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| Institution: | College of Land and Environment,Shenyang Agricultural University/Key Laboratory of Cultivated Land Conservation in Northeast,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources,College of Land and Environment,Shenyang Agricultural University/Key Laboratory of Cultivated Land Conservation in Northeast,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources,College of Land and Environment,Shenyang Agricultural University/Key Laboratory of Cultivated Land Conservation in Northeast,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources,College of Land and Environment,Shenyang Agricultural University/Key Laboratory of Cultivated Land Conservation in Northeast,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources,College of Land and Environment,Shenyang Agricultural University/Key Laboratory of Cultivated Land Conservation in Northeast,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources,College of Land and Environment,Shenyang Agricultural University/Key Laboratory of Cultivated Land Conservation in Northeast,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources,College of Land and Environment,Shenyang Agricultural University/Key Laboratory of Cultivated Land Conservation in Northeast,Ministry of Agriculture and Rural Affairs/National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources |
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| Abstract: | Iron tailings as industrial waste have been used in agricultural manufacturing and improve soil structure, while soil compaction induced through agricultural equipment operation is one of the important factors that destroy soil structure and affect crop yield. The purpose of this study is to explore the effect of iron tailings combined with organic materials on the compression and rebound characteristics of cinnamon soil. The soil mixed with iron tailings and organic materials was cultivated for 24 hours at 18% moisture content and loaded into the special ring knife for geotechnical test according to the volume of 1.25 g/cm3, carrying out the uniaxial compression test by using the rapid consolidation test method. The results showed that with the increase of iron tailings application, the amount of soil void ratio reduction (?e) would raise at low applied stresses and reduce at high applied stresses. Both the pre-consoildation stress (Pc) and the compression index (Cc) decreased with the increase of iron tailings application. The variation ranges of Pc and Cc were 72.91 ~ 119.30 kPa and 0.445 ~ 0.720 respectively. Both of them were very significantly positively correlated with organic matter content and were very significantly negatively correlated with sand content (P<0.01). Organic materials was the main factor affecting the soil rebound characteristics. The rebound index (Cs) varied from 0.0109 to 0.0169, which had no correlation with the organic matter and sand content. Compared with the control, treatment of 20% iron tailings combined with organic materials could reduce the soil compression index by 12.77%, and the pre-consolidation stress and rebound index increased by 6.93% and 22.14% respectively, reducing the compaction risk. |
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| Keywords: | soil compression soil void ratio pre-compression stress compression index rebound index iron tailings |
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