Injection of liquid swine slurry and effects on properties of a Nitossolo Vermelho

Abstract

The objective of this work was to evaluate the superficial and injected applications of swine slurry and urea to the soil, regarding their effects on the physical properties of a Nitossolo Vermelho distroférrico under a no-tillage system. The treatments were: injected slurry into the groove with a liquid swine slurry injector (LSSI); slurry on surface, applied on the lines by the LSSI kept raised; urea injected by opening the groove with the LSSI and distributed manually; and corn, under no-tillage, as a control. Sowing and the injection of liquid slurry or urea do not modify the organic carbon content, pH, and aggregation, but alter the soil bulk density and porosity in the mobilized line, and increase the macropores.

Effect of swine manure on soil health properties: A systematic review

“…Adesanya et al (2016) found that mean weight diameter was significantly greater in the manure treatment compared with the control soil; this is likely due to an increase in SOC after manure is applied to the soil. Rech et al (2018) found no change in mean weight diameter in a clay soil when liquid swine manure or inorganic fertilizer was applied. Tavares et al (2019) found that the mean weight diameter increased the most when only 25 m 3 ha −1 yr −1 liquid swine manure was applied (39%) and increased the least when 75 m 3 ha −1 yr −1 liquid swine manure was applied (15%), which suggests that the composition of the swine manure is more important than the rate that it is applied.…”

“…Two of the swine manure papers that were reviewed reported an increase in bulk density and a decrease in porosity after manure was applied to clayey soils (Rech et al., 2018; Scheid et al., 2020) (Table 5). Soil bulk density did decrease over time with annual swine manure application compared with the control that did not receive manure (Scheid et al., 2020).…”

“…Rech et al. (2018) found no change in mean weight diameter in a clay soil when liquid swine manure or inorganic fertilizer was applied. Tavares et al.…”

“…Rech et al (2018) injected or surface applied manure to the soil either in grooves that were created using liquid swine slurry injector equipment or on the raised lines created using the injector equipment, which avoids soil mobilization. Although both application methods increased the bulk density compared with the control plots, bulk density was lower in the lines compared with when manure was applied to the grooves (Rech et al, 2018). Bulk density may have increased due to compaction caused by the liquid swine slurry injector equipment.…”

Incorporation in soil and addition of enzyme inhibitor as a way to increase the efficiency of pig slurry and mineral fertilizer

“…This set was adapted from a no-till sowing machine, which has a front cutting disc and a furrower stem, in which the posterior face is located the output of the jet of PS. Thus, incorporations were performed in furrows of 0.12 m deep and spaced 0.35 m, with average width soil mobilization of 0.10 m (Rech et al, 2018). The PS superficial applications were made with the same equipment, but with the incorporation set suspended over the ground.…”