An Agro-Silvo-Pastoral Production System in Brazil
Mariana Pereira1, Davi Jose Bungenstab2, Roberto G. Almeida2, Horst Jürgen Schwartz3
1Federal University of Mato Grosso Do Sul, Animal Science, Brazil
Extensive beef production with grazing cattle kept exclusively on sown pasture is one of the main economic activities in Central-Brazil. Poorly managed systems, besides the evident inefficient use of local natural resources, lead to environmental degradation. Alternatives for recovering such areas are being developed, among them, some complex integrated production systems. EMBRAPA beef cattle leads technology research for beef cattle husbandry in Brazil, for such, a 12 years agro-silvo-pastoral experiment was implemented in 2009 to identify the most appropriate combinations of species and cultivars, tree densities and stocking rates, as well as cultivation techniques for local conditions. An 18 ha trial combining Brachiaria pastures with Eucalyptus trees (227 trees per ha) having soybeans cultivation periodically to improve pastures was implemented at EMBRAPA beef cattle experimental Station in Campo Grande-MS, Brazil. Preliminary results available from the on-going experiment show that the system is able to keep stocking rates above average of previous traditional pastures (1.3 versus 0.8 AU ha-1). Forage availability and quality is above regional averages, reaching 4.964 kg DM ha-1 and crude protein content of 8.97%, also above regional averages, resulting in cattle live-weight gains of 172 kg ha-1 year-1 against regional averages of 70 kg ha-1 year-1. Grain crop production between months 38 to 42 using no-tillage seeding over Brachiaria grass between tree rows resulted in soybean yields of 2880 kg ha-1, which are close to regional averages (3200 kg ha-1). Forest production results showed DBH of 16 cm and 38 m3 ha-1 at month 36. Estimated carbon storage by the system for the same period was 40 metric tons of CO2 equivalents per ha.
Keywords: Beef cattle, Brachiaria, Eucalyptus, integrated systems, soy bean
Contact Address: Horst Jürgen Schwartz, Humboldt-Universität zu Berlin, Department of Livestock Ecology, Asternplatz 2a, 1220ß Berlin, Germany, e-mail: schwartzhjgmail.com