02228naa a2200337 a 450000100080000000500110000800800410001902400590006010000240011924500910014326000090023452012410024365000230148465000140150765000240152165000110154565000240155665000200158065300260160065300160162665300140164265300140165665300380167065300140170865300130172270000180173570000210175370000220177470000190179677300750181519266502023-02-16       2012    bl uuuu     u00u1 u    #d7 ahttp://dx.doi.org/10.1590/S0100-204X20120004000012DOI1 aPEZZOPANE, J. R. M.  aDry matter production of Tanzania grass as a function of agrometeorological variables.  c2012  aThe objective of this work was to develop and validate linear regression models to estimate the production of dry matter by Tanzania grass (Megathyrsus maximus, cultivar Tanzania) as a function of agrometeorological variables. For this purpose, data on the growth of this forage grass from 2000 to 2005, under dry?field conditions in São Carlos, SP, Brazil, were correlated to the following climatic parameters: minimum and mean temperatures, degree?days, and potential and actual evapotranspiration. Simple linear regressions were performed between agrometeorological variables (independent) and the dry matter accumulation rate (dependent). The estimates were validated with independent data obtained in São Carlos and Piracicaba, SP, Brazil. The best statistical results in the development and validation of the models were obtained with the agrometeorological parameters that consider thermal and water availability effects together, such as actual evapotranspiration, accumulation of degree-days corrected by water availability, and the climatic growth index, based on average temperature, solar radiation, and water availability. These variables can be used in simulations and models to predict the production of Tanzania grass.  aEvapotranspiration  aHeat sums  aMegathyrsus maximus  aModels  aEvapotranspiração  aPanicum maximum  aClimatic growth index  aDegree days  aGraus dia  aGraus-dia  aÍndice climático de crescimento  aModelagem  aModeling1 aSANTOS, P. M.1 aMENDONÇA, F. C.1 aARAÚJO, L. C. de1 aCRUZ, P. G. da  tPesquisa Agropecuária Brasileiragv. 47, n. 4, p. 471-477, abr. 2012.