População de coprófagos em áreas de integração lavoura pecuária em dois níveis de adubação nitrogenada

Abstract

A high food production and also with high quality is now one of the main challenges of Brazilian and world agriculture. There is a need to ensure food for a population that grows at a rapid pace and increasingly depends on the field ability to generate food, fiber, energy production, timber and other goods. In this sense it is necessary to enhance agricultural production it is necessary to intensify production on available land, explore the soil to the fullest, but in an orderly manner without degrading it. The crop livestock integration system, starts from a principle of continuous soil use and assists in increasing production. This production system if done correctly improves the chemical, physical and biological soil conditions. In this context the coprophagous beetles perform an important job of incorporating organic matter into the soil, popularly known as "dung beetles" the coprophagous remove cattle feces by making small "balls" transporting them to distant places of fecal plate and incorporating them into the soil. The experiment was conducted in a private rural property in the town of Abelardo Luz - SC during the winter of 2014. This study aimed to evaluate the effect of nitrogen fertilization (0 and 200 kg N ha-1) applied to cover in the form of urea, on the population and diversity of captured coprophagous by "pitfal" traps on oat pastures Avena (Avena strigosa Schreb.) + ryegrass (Lolium multiflorum Lam.). The experimental design was a randomized block factorial 2x2 with three replications. The totalaverage population of individuals captured was 95.50 trap-1 e 97.41 trap-1 with 0 kg N ha-1 and 200, respectively. The average number of morphotypes was 7.58 trap-1 and 7.66 trap-1 with 0 kg N ha-1 and 200, respectively. The results show that nitrogen fertilization had no effect on coprophagous population and diversity.