The experiment was conducted in a protected cultivation in the Marechal Cândido Rondon, PR, Brazil. The experimental design was constituted of randomized blocks with six piggery wastewater doses (0, 25, 50, 100, 200 and 400 m³ ha-1) in four repetitions. The variables evaluated were: number of tillers, plant height, dry matter, leaf area, leaf number, potassium content, phosphorus content and crude protein in the culture, leachate and soil analysis. The number of tillers increased linearly with the addition of SRW doses. At the beginning of the development of millet culture, swine raising wastewater (SRW) application causes a decrease in plant height; however, over the course of time, this management increases those values. There was an increase in the number of leaves at the beginning, and leaf area at the end of the development of millet crop. The SRW doses applied did not cause increase in phosphorus and potassium contents in plants, raising only the crude protein. The dry mass is highly influenced by the increase in SRW doses, with their highest levels in a dose of 319.75 m³ ha-1. The SRW doses cause reduction in soil pH and its constituents are not leached.

The objective was to evaluate the inclusion of chemical additives or bacterial inoculant in corn silage. The experimental design was completely randomized with five treatments: silage without additive; silage added with urea (3.0%); silage with limestone (3.0%); silage added with crystal sugar (3.0%); and silage with a bacterial inoculant. Five of them were opened during the fermentation process (15 days) to measure pH, and three were opened 60 days after ensiling to evaluate the ammonia nitrogen and organic acids content. For the pH at the end of the fermentation process, higher values were found for the limestone additive, followed by the silage with urea, which had higher participation of lactic acid, 19.06 ppm for limestone and 18.95 ppm for urea. Higher concentrations of acetic acid were observed in inoculant silages (18.49ppm) or silage without additive (18.46ppm). The ammonia nitrogen content was higher in the silage with urea (23.74mg dL-1), followed by the silage without additive (7.54mg dL-1), which also had the highest concentration of butyric acid (4.19ppm). The use of additives reduced the concentration of butyric acid in the silage. The bacterial inoculant was the most efficient in decreasing the pH of the ensiled material.

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