02243naa a2200457 a 450000100080000000500110000800800410001910000190006024501460007926000090022552009480023465000130118265000210119565000140121665000110123065000180124165000180125965000130127765000260129065000210131665000200133765000250135765000220138265000200140465000130142465000230143765300110146065300130147165300150148465300160149965300200151565300100153565300220154570000160156770000200158370000210160370000190162470000200164370000300166377300920169313731272020-07-07       1997    bl uuuu     u00u1 u    #d1 aCARDOSO, E. C.  aSeasonal variation of selenium, crude protein, and in vitro organic matter digestibility of Brachiaria humidicola from Marajo Island, Brazil.  c1997  aNutritional content of Brachiaria humidicola grass in relation to crude protein(CP), in vitro organic matter digestibility (IVOMD), and selenium (Se) asrelated to wet and dry seasons in the Amazon region of Marajó Island, Brazil,was determined. Twenty-four samples, 12 from the dry and 12 from the wetseason, were analyzed. Grass selenium concentrations were not influencedby season and the means were above the minimal requirement for beef cattle in both seasons (0.14 or 0.15 ppm). Factors other than rainfall may beinvolved. Crude protein concentrations were lower (P&lt.05) in the dry (3.5%)than in the rainy season (4.8%) and in both seasons were lower than thecritical level for cattle (&lt7.0%). The IVOMD means were extremely low,33.5% in the wet season and 33.6% in the dry season. These analytical valuesindicate that Brachiaria humidicola grown at Marajó Island has nutritionallimitations for grazing buffalo and cattle production  aAmazonia  aanimal nutrition  abuffaloes  acattle  acrude protein  adigestibility  aselenium  aBrachiaria Humidicola  aCapim Brachiaria  aDigestibilidade  aGramínea Forrageira  aNutrição Animal  aProteína Bruta  aSelênio  aVariação Sazonal  aBrasil  aBubalino  aFeed grass  aGado bovino  aIlha de Marajó  aPará  aSazonal variation1 aVALE, W. G.1 aMcDOWELL, L. R.1 aWILKINSON, N. S.1 aSIMAO NETO, M.1 aVEIGA, J. B. D.1 aLOURENCO JUNIOR, J. de B.  tCommunications in Soil Science and Plant Analysisgv. 28, n. 19/20, p. 1683-1691, 1997.