硅渣土壤调理剂施用对设施土壤物理性状影响研究

Study on the Effect of Silica Slag Soil Conditioner Application on Physical Properties in Facility Soil

摘要: 本试验研究硅渣调理剂不同施用量对土壤容重、土壤团聚体及田间持水量等土壤物理性状的影响，共设计五种施硅渣水平CK、Si1、Si2、Si3、Si4，施用量分别为0、10、20、30、50 kg (SiO₂)/亩。结果表明，Si4处理土壤容重为1.34 g/cm³，对土壤容重降低效果显著优于其他处理(P < 0.05)，较CK处理改善效果最佳。Si1处理在>0.25 mm水稳性团聚体含量及平均重量直径的表现上显著优于其他处理(P < 0.05)，其他处理无显著差异。土壤田间持水量的结果与土壤容重表现一致，Si4处理显著优于其他处理且较CK处理改善最佳(P < 0.05)。施用硅渣调理剂对土壤物理性状有显著影响，并且对土壤结构有积极的改善作用。综合看，在本试验条件下，Si4处理(亩施SiO₂ 50 kg)对土壤结构的综合改善效果最佳。

Abstract: In this experiment, the effects of different application dosages of silica slag conditioner on soil bulk density, soil aggregates, field water capacity and other soil physical properties were studied. A total of five silica slag application levels CK, Si1, Si2, Si3 and Si4 were designed, with application dosage of 0, 10, 20, 30 and 50 kg (SiO₂)/mu respectively. The results showed that Si4 treatment of soil bulk density was 1.34 g/cm³, significantly better than other treatments in reducing soil bulk density, and better than CK treatment. Si1 treatment was significantly better than other treatments in terms of >0.25 mm water-stable aggregate content and average weight diameter (P < 0.05), but there was no significant difference in other treatments. The results of soil field water holding capacity were consistent with the soil bulk density, and Si4 treatment was significantly better than other treatments and better improved than CK treatment. The application of silica residue conditioner has significant effect on soil physical properties and has positive effect on soil structure. In summary, under the conditions of this experiment, Si4 treatment, namely SiO₂ 50 kg per mu, had the best comprehensive improvement effect on soil structure.