RESUMO -O experimento foi realizado para avaliar a produtividade, o perfilhamento, a porcentagem de lâmina/haste e a composição bromatológica (PB, FDN e FDA) de três variedades (Africano, Americano e BN-2) de milheto (Pennisetum glaucum (L) R. Br.) em três idades de corte (35, 42 e 49 dias). Na primeira fase da pesquisa, foi utilizado delineamento experimental em blocos casualizados, em um esquema de parcelas subdivididas no tempo, com quatro repetições. Na fase de rebrota, o delineamento foi inteiramente casualizado, com o mesmo número de repetições. As parcelas principais foram representadas pelas variedades e as subparcelas, pelas três idades de corte. A produção média de MS durante a fase de corte foi similar entre as variedades (4. Forage yield and chemical composition of pearl millet varieties (Pennisetum glaucum (L.) R. BR.)ABSTRACT -The objective of this experiment was to evaluate the productivity, tillering, leaf blade/stem ratio and chemical composition (CP, NDF and ADF) of three pearl millet (Pennisetum glaucum (L.) R. BR.) varieties (African, American and BN-2) submitted to three different cutting ages (35, 42 and 49 days). During the first growth period, a splitplot arrangement in a complete randomized block design was used with varieties being the main plots and cutting ages the subplots. During regrowth, a complete randomized design was used. In both cases, there were four replications per treatment.Dry matter yield among varieties was similar (4,360, 4,204, and 3,247 kg/DM/ha) for the varieties African, American and BN-2, respectively. The CP (15.36, 16.71, and 16.3%), NDF (60.55, 56.29, and 55.93%) and ADF (34.55, 30.04, and 30.98%) concentrations as well as the leaf blade/stem percentages differed among African, American and BN-2 varieties, respectively.Dry matter productivity, NDF, and ADF concentrations increased with the advance of cutting age while leaf blade/stem ratio and CP decreased linearly. Productivity was reduced during regrowth, however, the average CP (19.75, 20.21, and 20.43%), NDF (52.45, 53.19, and 53.42%) and ADF (27.44, 26.72, and 27.06%) concentrations did not differ among African, American and BN-2 varieties during this period, respectively. The leaf blade/stem ratio, however, differed among them during regrowth.Forage nutritive value at regrowth was greater than during first growth period. American and BN-2 varieties presented the highest leaf blade percentage while the African variety showed the highest stem percentage. Thus, the best forage varieties are American and BN-2 and the best cutting age is 49 days.
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