Ribeiro et al., 2004. Rev. Bras. Zootec., 33 (5): 1351-1359

Animal production and ruminal parameters were analysed to evaluate the substitution of corn by pearl millet (Pennisetum glaucum). Four lactating cannulated Holstein-Friesian cows were used in a incomplete 5*4 Latin square design. The cows were fed a 48.6% corn silage diet (dry matter basis). Treatments consisted of substitution of corn starch by pearl millet in 5 different proportions: 100:0, 75:25, 50:50, 25:75 and 0:100. All grain substitutions were estimated on a starch content basis. There was no effect of grain source on dry matter intake, milk yield and milk fat percentage. However, there was a quadratic effect on milk protein content as pearl millet grain increased. There was no treatment effect on ruminal pH, acetate, propionate, butyrate and total volatile fatty acids concentration. There was a linear effect on ruminal N-NH3 concentration when pearl millet level was increased. In conclusion, pearl millet substitution for corn silage does not seem to affect the performance of lactating Holstein-Friesian dairy cows.