02479nam a2200493 a 450000100080000000500110000800800410001910000200006024501170008026000390019730000090023649000340024552011010027965000190138065000250139965000190142465000190144365000230146265000140148565000150149965000210151465000200153565000250155565000100158065000260159065000200161665000130163665000140164965000250166365000260168865300090171465300240172365300240174765300240177165300260179565300180182165300110183965300270185065300230187765300220190065300190192270000250194170000190196621096312019-06-04       2010    bl uuuu     u0uu1 u    #d1 aVALENTIM, J. F.  aReconciling cattle ranching and environmental conservation in the Legal Brazilian Amazon.h[electronic resource]  aRio Branco, AC: Embrapa Acrec2010  a3 p.  a(Embrapa Acre. Police brief).  aThe Legal Brazilian Amazon is a region with growing economic, social and environmental relevance in the national and international scenarios. With a cattle heard above 70 million heads and an area of native and cultivated pastures above 61 million hectares cattle ranching has been one of the main focus of the debate regarding the sustainable development of the Region In the last 30 years, gains in productivity avoided need for incorporation of 147.5 million hectares of the biomes Cerrado and Amazon to the cattle production systems in the Legal Amazon to meet the current world demand for meat. Studies conducted at farm level in the State of Acre show that improved mixed grass-legume pastures with grass species of the genera Braquiaria or Panicum and the legumes Pueraria phaseoloides or Arachis pintoi managed correctly can allow farmers to sustainably maintain stocking rates of 2.5-2.7 animal units/hectare (1 animal unit is equivalent to 450 kg of live weight), with no need of nitrogen fertilizer, the most limiting and expensive nutrient to agricultural production in the tropics. .  aArachis pintoi  aEnvironmental impact  aForage grasses  aForage legumes  aGrazing management  aLivestock  aBrachiaria  aCapim Brachiaria  aCapim Colonião  aGramínea Forrageira  aKudzu  aLeguminosa Forrageira  aPanicum Maximum  aPastagem  aPecuária  aProteção Ambiental  aPueraria Phaseoloides  aAcre  aAmazonia Occidental  aAmazônia Ocidental  aAmendoim forrageiro  aCacahuetes forrajeros  aForage peanut  aGanado  aLeguminosas forrajeras  aManejo de pastoreo  aPastos forrajeros  aWestern Amazon1 aANDRADE, C. M. S. de1 aBARIONI, L. G.