School of Resources and Environmental Engineering，Ludong University,Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences,School of Resources and Environmental Engineering，Ludong University,School of Resources and Environmental Engineering，Ludong University,School of Resources and Environmental Engineering，Ludong University
The National Water Pollution and Treatment Science and Technology Major Project of China (2015ZX07203007); The Natural Science Foundation of Shandong Province (ZR2013DM010).
应用化学改良剂是改良利用盐渍土的重要措施之一。竹炭型土壤调理剂（Bamboo-charcoal Soil Amendment，BC）能有效改善土壤的物理结构，但其用量至关重要。本文按照BC 占干土的比例设置为0‰、4‰、8‰、12‰、16‰、20‰，通过盐化潮土的一维垂直入渗试验，探求改良轻度盐渍土的较适宜BC 用量范围。结果表明：1）施用BC 能够增大湿润锋运移深度，增加土壤累积入渗量。相同历时（240 min）情况下，施用BC 处理的湿润锋移动深度较CK 分别增加4.5%、11.9%、10.2%、15.3% 和17.6%，累积入渗量较CK 分别增加5.1%、18.4%、11.2%、23.5% 和23.6%。2）添加BC 可以改变土壤水分的分布特征，随BC 用量的增加，0~10 cm 土层含水率呈减小趋势，10~30 cm 土层含水率呈增大趋势。3）各BC 处理的土壤浸提液电导率随土层深度增加呈增大趋势，土壤盐分分布呈“底聚型”；土壤湿润区中Cl- 和Na 在剖面上均呈“L”型分布；4）综合土壤水盐的剖面分布及其数量特征，BC 施用量为8‰时，对土壤的改良效果最好，但此用量的实际应用效果有待进一步验证。
It is an important measure to apply chemical modifiers to improve saline soil. Bamboo-charcoal Soil Amendment (BC), as a kind of soil conditioners, have important effect on improving soil physical structure, but its dosage is crucial problem. In this experiment, the application amount of BC was set as 0‰, 4‰, 8‰, 12‰, 16‰, and 20‰ according to the percentage of dry soil mass basis, and then one-dimensional vertical infiltration experiment was carried out to explore the suitable dosage of BC in improving the salinized Chao soil. The results showed that: 1) Application of BC could increase soil wetting front depth and the cumulative infiltration. Under the same duration (240 min), compared with CK treatment, the wet front depth with BC applications of 4‰, 8‰, 12‰, 16‰, and 20‰ was increased by 4.5%, 11.9%, 10.2%, 15.3% and 17.6%, respectively, and the cumulative infiltration was increased by 5.1%, 18.4%, 11.2%, 23.5% and 23.6% separately 2) The application of BC changed the water distribution characteristics in soil profile. The water content of 0~10 cm soil layer decreased with the increasing amount of BC application, but which that of 10~30 cm soil layer increased. 3) The average value of conductivity of soil extracts increased with the increase of soil depth, and the soil salinity showed the characteristics of bottom aggregation; Cl- and Na in soil wet zone both showed “L” shaped distribution features on the soil profile. 4) In terms of comprehensive soil water and salt condition, 8‰ of BC application amount showed the best effect on soil quality improvement. However, the actual effect of this amount of BC application in field needs to be further verified.
刘璐,张晴雯,潘英华,陈雅囡,胡鑫隆. 竹炭型土壤调理剂对土壤水盐运移及分布的影响[J]. 农业现代化研究, 2019, 40(5): 862-869
Liu Lu, Zhang Qingwen, Pan Yinghua, Chen Yanan, Hu Xinlong. Effect of bamboo-charcoal soil amendment on soil infiltration and water salt distribution[J]. Research of Agricultural Modernization, 2019, 40(5): 862-869