Organic mineral and phytase as reducer of the pig manure pollutant power

Author(s)

Amanda Raquel de Miranda Caniatto

• Document type: Master's Dissertation
• Press: Pirassununga.
• Institution: Universidade de São Paulo (USP). Faculdade de Zootecnica e Engenharia de Alimentos (FZE/BT)
• Defense date: 2011-04-08

Examining board members

Marcus Antônio Zanetti; Anibal de Sant\'Anna Moretti; Evaldo Antônio Lencioni Titto

• Advisor: Marcus Antônio Zanetti

Abstract

This study aimed to evaluate the use of phytase and organic minerals (Cu and Zn) in pig diets in order to reduce the power of polluting waste. Sixteen pigs at the age of 68 days, were allocated in metabolism studies cages for collection of feces and urine, in a climatic chamber. The animals were kept in two tracks of ambient temperatures: thermal comfort and heat stress, and subjected to the treatments: control (T1); organic minerals supplementation (T2); phytase supplementation (T3); organic minerals and phytase supplementation (T4). Feces and urine were analyzed for P, N, Na, K, Cu, Zn and Ca concentrations. It was also measured rectal temperature, body surface temperature, feces and urine volume and the food and water consumption. The results had shown that heat stress affected the rectal and superficial temperature, and excreted feces volume (P<=0,05). The Zn and Ca excretion were reduced with the phytase use, whereas organic Cu and Zn benefited Zn, Ca and P (P<=0,05). The heat stress significantly increased Cu excretion, while Na was reduced (P<=0,05). Although there was no interaction on the activity of phytase and organic minerals, these additives contributed to the excretion reduction of minerals. (AU)

• FAPESP's process: 09/04231-1 - Organic mineral and phytase as reducing the power of pollutant pig manure
• Grantee: Amanda Raquel de Miranda Caniatto
• Support Opportunities: Scholarships in Brazil - Master