Resíduos orgânicos na produção de forragem e seus impactos na qualidade química do solo

Abstract

Poultry and swine husbandry are two activities carried out on the small rural property primarily with family labor. Associated with this, as a monthly income increment, milk production has been another diversification and income alternative for these production units. When thinking about milk production, genetics and food are two key factors. Therefore, the present work aimed to evaluate the production of green mass and dry mass and nutrient accumulation in the aerial part of tifton 85 and ryegrass with application of animal residues, as well as the impact of successive applications on quality. soil chemistry. This work was developed from 2012 to 2015 in the area of the Federal Farroupilha Institute, Frederico Westphalen. A randomized block design was used, the soil classified as typical Eutrophic Red Latosol. The evaluation of green and dry forage mass production carried out at 45 to 60 days intervals and the residues applications at approximately 90 days intervals, totaling 4 annual and 16 total applications during the experiment. After this period, soil was sampled at depths of 0-10 and 10-20cm for chemical evaluation. The results showed a significant response regarding the forage green matter and dry matter production as well as the nutrient accumulation in its aerial part. As for the chemical quality of the soil, the results show that successive applications of poultry litter and swine slurry lead to a significant accumulation of phosphorus and zinc, which require, from an environmental point of view, a more constant monitoring of these receiving areas. successive applications of these wastes.