Inadequate application of liquid pig manure (LPM) may pose risks to the soil due to the potential contaminants that exists, as well as by the large water input that can originate excessive moisture. By using Terrestrial Model Ecosystems, this study aimed to evaluate the effect of application of LPM (82% moisture) using the application rates of 20, 50 and 150 m³ ha⁻¹ and also of the corresponding amount of water to understand the origin of effects on the soil fauna of two sub-tropical soils. In general, the results obtained for the two soil types indicated that LPM (150 m³ ha⁻¹) changed the composition of soil fauna, with an increase in the abundance of insect larvae and dipterans, but a decrease in the number of earthworms and enchytraeids. Microbial biomass, soil respiration and the nutrients Mg, K and P increased with the amount of LPM supplied to the soil. When analysing the effects of adding large volumes of water via the LPM, results showed that application did not originate significant effects on the parameters measured. The differences obtained when comparing both treatments were mainly attributed to the organic load brought by the LPM and not to the amount of water without LPM.

液态猪粪（LPM）的不适当施用可能会对土壤造成风险，原因是存在的潜在污染物以及大量的水输入会产生过多的水分。通过使用陆地模型生态系统，本研究旨在通过使用20、50和150 m ³ ha ^-1的施肥量以及相应量的水来评估LPM（82％水分）的施用效果，以了解LPM的起源。对两种亚热带土壤的土壤动物的影响。通常，两种土壤类型获得的结果表明，LPM（150 m ³ ha ^-1）改变了土壤动物的组成，增加了昆虫幼虫和dip虫的数量，但减少了and和囊虫的数量。微生物生物量，土壤呼吸作用以及养分Mg，K和P随着供给土壤的LPM的增加而增加。当分析通过LPM添加大量水的效果时，结果表明，应用对测量的参数没有产生显着影响。比较两种处理时获得的差异主要归因于LPM带来的有机负荷，而不归因于没有LPM的水量。