Avaliação dos efeitos de águas residuárias de suínos sobre a produção de fitomassa de pastagem do gênero Cynodon e nos atributos biológicos do solo

Abstract

The fertirrigation and irrigation used in fodder can contribute to the production of dry material and use of organic residue (such as wastewater of hog raising) may contribute for improvement of soil biological attributes. The experiment was developed at the Centro de Ciências Agrárias e Biológicas do Campus de Jataí, da Universidade Federal de Goiás, located in the city of Jataí, from november/06 to june/07, in an experimental area of soil Latossolo Vermelho Distroférrico. The design was made in blockes randomly devided into plots with five treatments and four repetitions. They consisted of chemical fertilization without irrigation, fertilization with organic waste from pigs in one application and irrigation, chemical fertilizer and irrigation, organic wast fertirrigatin from pigs and irrigation, and chemical fertirrigation and irrigation. Three variets of Cynodon have been used: Coast cross, Tifton 86 and Florakirk. The treatments were irrigated and fertirrigated with microsplinker. The objective was to evaluate the effects of fertirrigation and irrigation associated with the use of wastwwater in grasses of Cynodon genre, by changes in the biological attributes of soil and the production of dry material. Soil correction was made in the experiment, after chemical analysis. It was used a maximum strength of 180 m3 ha-1ano-1 of organic waste and for chemical fertirrigation and adubation, both calibrated with each other. For statistical analyses the Estat- Jaboticabal program was used. The chemical treatments and organic waste treatments showed similar results.