It was studied the effects of replacing ground corn with coffee hulls on intake, apparent digestibility, and milk production and composition of lactating dairy cows. Twelve Holstein-Zebu dairy cows were blocked by days in milk and randomly assigned to three 4 x 4 Latin squares. The following levels of coffee hulls were included in the concentrate portion of the diet: 0.0, 8.75, 17.5, or 26.25% of dry mater (DM). Diets were formulated to be isonitrogenous (14% CP) and contained a […]

Sixteen 7/8 Holstein-Zebu multiparous cows averaging 30 DIM were used in a complete randomized block design with a 2 x 2 factorial arrangement to study the effects of supplementing monensin and/or soybean oil on production of early lactating dairy cows. The experimental period lasted 84 days and was divided in three phases as follows: I – 5th to 8th, II – 9th to 12th, and III – 13th to 16th week of lactation. The following treatments were used: control diet […]

Twelve lactating Holstein dairy cows were assigned to three 4×4 Latin squares to evaluate the effects of feeding corn silage or different dietary ratios of sugarcane and concentrate on nutrient intake, apparent digestibility, milk composition and yield, and body weight change. The diets contained 60% corn silage or 60, 50, and 40% of sugarcane supplemented with 1% of urea + ammonium sulphate (9:1). No significant differences were observed between the diet with 60% of corn silage and that with 40% […]

Four ruminally cannulated Holstein steers averaging 259 kg of body weight were randomly assigned to a 4×4 Latin square to study the effects of replacing elephantgrass silage with cottonseed hulls on intake and apparent ruminal, intestinal, and total tract digestibilities of dry matter (DM), organic matter (OM), ether extract (EE), crude protein (CP), neutral detergent fiber corrected to ash and protein (NDFap), and corrected non-fiber carbohydrates (NFCap). Intake of total digestible nutrients (TDN) and ruminal degradabilities of cottonseed hulls, elephantgrass […]

The objective of this study was to evaluate production, blood metabolites, and nutrient digestibility of Saanen goats either in the beginning or after 60 days of lactation. Twenty goats averaging 59.59 ± 6.97 kg of body weight were assigned to a completely randomized design. The following forage:concentrate ratios were used: 40:60, 50:50, 60:40, 70:30, or 80:20 and provided 2.95, 2.83, 2.70, 2.58, or 2.46 Mcal ME/kg DM, respectively. Animals were confined in individual stalls with daily measurements of feed intake […]

Four ruminally cannulated Holstein steers averaging 259 kg of body weight were assigned to a 4×4 Latin square to study the effects of replacing elephantgrass silage with cottonseed hulls on serum urea nitrogen (SUN), ruminal metabolism, urinary excretion of nitrogenous compounds, and microbial protein synthesis measured by omasal purine bases or by urinary excretion of purine derivatives. Treatments (60% of forage) contained on DM basis: 0, 10, 20 or 30% of cottonseed hulls that partially replaced elephantgrass silage in the […]

The effects of supplements containing different rumen-undegradable protein (RUP) levels on the ruminal passage rate of particles and liquid of steers grazing Brachiaria brizantha were evaluated in this study. Samples were collected in two seasons of the year (season 1 May, June and July/2000 and season 2 March, April and May/2001). In season 1, animals were housed in individual stalls and were fed supplements containing 20, 40 or 60% RUP plus Brachiaria brizantha hay and had free access to a […]

The objective of this trial was to determine the body composition and nutritional requirements of macrominerals for Morada Nova sheep. Thirty lambs averaging 15 kg of initial body weight (BW) and 70 days of age were used in this study. Six lambs (reference-animals) were slaughtered with 15 kg of BW to determine the initial body composition using the comparative slaughter methodology; six other lambs were slaughtered with 20 kg of BW (intermediary slaughter) and the remaining 18 lambs were distributed […]

The objective of this trial was to study the effects of different dietary levels of the ionophore monensin on apparent digestibility of nutrients and on ruminal, blood, and urinary metabolites in dairy heifers. Samples of ruminal fluid (pre-feeding and 2 hours post-feeding), blood, urine, and feces all were collected from 28 confined Holstein heifers. Diets contained (dry matter basis): 32.84% of concentrate (corn grain, soybean meal, urea, and mineral salt mixture), 33.58% of corn silage, and 33.58% of sugarcane. The […]

The objective of this trial was to study intake, apparent total tract digestibility, and production of Nellore steers fed diets containing the following ratios of Brachiaria brizantha and sorghum silages: 100:0, 67:33, 33:67, and 0:100 on dry matter (DM) basis. Twenty-four castrated steers averaging 380 kg at the beginning of the trial and receiving a forage:concentrate ratio of 60:40 (DM basis) were used in a randomized complete block design (six replicates per treatment). The experiment lasted 78 days with three […]