| 引用本文: | 郭同铠,毛伟兵,孙玉霞,等.腐殖酸对滨海粘质盐土持水性能的影响[J].灌溉排水学报,0,():-. |
| GUO Tong-kai,MAO Wei-bing,SUN Yu-xia,et al.腐殖酸对滨海粘质盐土持水性能的影响[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 为研究腐殖酸对黄河三角洲粘质盐土持水性能的影响,进行了不同腐殖酸配施量下的室内试验。通过压力膜法测定各处理不同水吸力下的土壤含水量,结合VG模型分析土壤水分特征曲线；通过KSAT饱和导水率仪测定土壤饱和导水率,分析腐殖酸配施量与饱和导水率关系；通过不同腐殖酸配比下粘质盐土持续蒸发试验,结合蒸发量分析腐殖酸配施量与蒸发的关系。结果表明：粘质盐土配施腐殖酸后,土壤水分特征曲线发生明显变化。其中,各腐殖酸配施量下粘质盐土水分特征曲线均高于T0；土壤水分常数发生明显上升,其中T2和T5配量,升高最明显；饱和导水率明显上升,且T2和T5上升最明显,与T0相比分别上升了36.96%和56.92%；土壤蒸发发生明显变化,结合6小时和12小时累计蒸发量发现,T2-T4蒸发量较小,其中T4蒸发量最小。综上所述,腐殖酸能有效提高土壤持水能力,且T2处理下粘质盐土持水能力最强。 |
| 关键词: 粘质盐土；腐殖酸；土壤持水能力；VG模型 |
| DOI： |
| 分类号:S156.4 |
| 基金项目:山东省重大科技创新项目(2017CXGC0306)：盐渍土快速改良与地里培肥产品的研发与应用。 |
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| Effects of humic acid on water holding properties of clay solonchak |
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GUO Tong-kai1, MAO Wei-bing2, SUN Yu-xia1, XIA Li-juan1
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1.College of Water Comservancy and Civil Engineering,Shandong Agricultural University,Tai’an Shandong 271018;2.山东农业大学
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| Abstract: |
| In order to study the effect of humic acid on the water-holding properties of the clay soil in the Yellow River Delta, laboratory experiments under different humic acid application rates were carried out. The soil water content under different water suctions of each treatment was determined by pressure membrane method, and the soil water characteristic curve was analyzed by VG model. Determination of soil saturated hydraulic conductivity by KSAT saturated hydraulic conductivity meter and analysis of relationship between humic acid compounding amount and saturated hydraulic conductivity. The relationship between the amount of humic acid and evaporation was analyzed by the evaporation test of clay soil under different humic acid ratios. The results showed that the soil moisture characteristic curve changed significantly after the application of humic acid in the clay soil. Among them, the moisture characteristic curves of the clay soil under the application of humic acid were higher than T0. The soil water constant increased significantly, and the T2 and T5 doses increased most obviously. The saturated hydraulic conductivity increased significantly, and the increase of T2 and T5 was the most obvious, which was 36.96% and 56.92% higher than that of T0. The soil evaporation changed significantly. Combined with the accumulated evaporation in 6 hours and 12 hours, it was found that T2-T4 had a small evaporation, and the T4 evaporation was the smallest. In summary, humic acid can effectively improve soil water holding capacity, and the clay soil has the strongest water holding capacity under T2 treatment. |
| Key words: clay solonchak;humic acid;soil water holding capacity;VG model |
