Avaliação da composição inicial dos dejetos suínos mediante à adição de casca de arroz

Abstract

One of the biggest difficulties in agriculture, mainly for swine farming, is the optimization of production systems so that they, as well as competitive not cause a negative impact on the environment, particularly soil and water. Composting is an excellent alternative for biological, physical and chemical control of the manure as it reduces the risk of contamination and its negative interaction with the environment. The objective of this work is to evaluate the initial compose of the pig manure, with and without the addition of rice husk, to thereby determine the impact of the mixture of rice husk on the initial compose of the manure. The adoption of practice where the waste is mixed with other materials, in this case specifically rice husk, and improve the nutritional composition of the final product, favors the most appropriate target in general. The experiment was conducted at the farm I of Yargo Swine Culture, located in Itaqui-RS. The swine manure were placed in tanks and the composters were arranged in a place protected from rain. There were two treatments, one treatment in the composters were 1.56 m³ of waste, already, in treating the two composters were 1.1 m³ of manure and 60 kg of rice husk, which corresponded to a height of 0.23 cm. There were five replicates per treatment, thus working with 10 storage tanks. Each repetition was considered an experimental unit. The experimental design was completely randomized. After verifying the normality of the data, we proceeded to the analysis of variance, and then the t test at 5% probability, with the help of computer program Assistat. Thus, the addition of rice husk, it can be said that there is a significant difference (P <0.05) in most of the items analyzed, proved to be better quality treatment 2 with 70% waste and 30% of rice husk, given the different composition of swine manure and residue, and this factor for the change of the compound.