02252naa a2200301 a 450000100080000000500110000800800410001910000230006024500920008326000090017530000130018449000480019750001130024552013850035865000190174365000110176265000110177365000120178465000120179665000090180865000220181765000120183965000230185165300110187465300160188570000170190177300320191815519321996-10-15       1992    bl ---       0--  u    #d1 aLOPES, H. O. da S.  aPotential of utilization of feed resources of Brazilian Cerrados for grazing livestock.  c1992  ap.56-66.  a(Tropical Agriculture Research Series, 25).  aTrabalho apresentado no 25th International Symposium on Tropical Agriculture Research, Tsukuba, Japan, 1991.  aOver 40% of the estimated 130 X 10 (expoente) 8 cattle population in Brazil is found in the "Cerrados" (savannas), a region which covers more than 200 million hectares. Livestock production levels per animal and per area are low and have remained stagnant for several decades. Forages are low in protein, digestible energy and minerals, particularly phosphorus, especially during the long dry season. It is estimated that by 1990 over 40 million hectares had been planted to pasture and over 12 million hectares had been planted to annual crops. More than 150 million tons of crop residues and by-products, mainly from corn, soybeans and sugarcane are potentially available to help solve the dry season feed shortages in integrated crop livestock production systems. Numerous forage grasses and legumes adapted to the cerrado ecosystem have been released. Recent research on legume-based pastures has demonstrated their large potential. Effectiveness of cheaper alternative phosphorus sources has been demonstrated. The integration of livestock and annual crop production systems is new but shows promise of potential synergism with important advantages for both livestock and crops. One of the major goals in developing efficient and sustainable production systems for the cerrados to meet the growing demand for food is to reduce pressure on the rainforests of the Amazon basin.  aanimal feeding  aBrazil  acattle  agrazing  aCerrado  aGado  aNutrição Animal  aPastejo  aSuplemento Mineral  aBrasil  aSupplements1 aNUNES, I. J.  tTsukuba, Japan: TARC, 1992.