Dry matter intake (DMI) of Tanzania grass under grazing conditions was estimated using 24 Holstein-Zebu and Gir cows from the in vitro dry matter digestibility of extrusa samples (esophageal fistulated cows) and fecal output. The fecal output was estimated using chromium mordant and a non-linear model. The pasture was managed in a rotational system with three days paddock occupation and 39 days of resting period. The stocking rate was 2.0 cows/ha during the rainy season. Four different equations based on […]

The influence of the level of intake of elephantgrass, under grazing, on the composition of digesta and on concentration of the marker Cr2O3 throughout the gastrintestinal tract (GTI) of bovines was studied. A split-plot completely randomized design with twelve treatments in the main plots (a 2×6 factorial with two levels of forage ingestion: restricted – NA1 and unrestricted – NA2, and six slaughter periods) and the five sections of GTI in the split-plots was used. Thirty six steers were used, […]

The objectives of the present study were to characterize and estimate parameters of kinetics of carbohydrate degradation using alfalfa hay, elephant grass, tifton 85, and corn silage, fed to dairy goats under different forage: concentrate ratio. Kinetic parameters of dry matter and neutral detergent fiber degradation at different pH values were estimated by using cumulative gas production technique and their values contrasted with those obtained by both in vitro and in situ studies. Kinetic interpretation for specific degradability, rate of […]

An experiment was conducted to evaluate the effects of five concentrate levels as dry matter basis (25.0, 37.5, 50.0, 62.5 and 75.0%) and two diet balance methods on the digestive tract, internal organs weight and gastrointestinal fill of 45 crossbred F1 Limousin x Nelore young bulls, averaging 14 months of age and initial live weight of 330 kg. One diet balance method was almost isoprotein with 12% of crude protein and the other was attempted to attend the metabolizable protein […]

The objectives of this work were to study the functional anatomy and the comparative morphometry in the medium intestine and in the rectum of Teleostei, surubim, Pseudoplatystoma coruscans (Agassiz, 1829) (Siluriformes, Siluroidei, Pimelodidae), with carnivorous feeding habits, in two size classes, aiming to provide nutritional data for the adjustment of different artificial feeding system. It was concluded that the surubim intestine, under a morphological view, must be called of medium intestine and rectum, due to the presence of ileo-rectal valve […]

The objective of this work was to verify the effects of lipid sources (ground soybean and soybean oil) added to the diet on the fatty acids profile of milk fat, specially in the increasing of CLA. Six multiparus 7/8 Holstein-Zebu cows, 30 days after calving, with average body weight of 500 kg and average milk production of 20 kg/day, were used. The animals were divided in three groups in order to receive isoprotein and isocaloric diets (treatments), in which control […]

This study was conducted to evaluate the effects of microbially inoculated alfafa silage on total digestibility in wethers. Twelve wethers were randomly assigned to two treatments: alfalfa haylage (35.7% DM and 19.6% CP, on average) control or microbially inoculated with Silobac product (Lactobacillus plantarum and Pediococcus pentosaceus). The experimental period extended for twenty-one days, the last five used for feces and urine collection. The inoculation increased total digestibility of DM (inoculated = 62.5% vs. control = 59.5%), NFE (70.9% vs. […]

Sunflower (20.0% DM and 10.0% CP) was ensiled in 16 plastic experimental silos, forming four treatments: control, Sil-All (S. faecium, P. acidilactici, L. plantarum, amylase, hemicellulase, and cellulase), Silobac (L. plantarum, S. faecium, and Lactobacillus sp.), and Pioneer 1174 (S. faecium and L. plantarum). Silos were opened 125 days after ensiling and sampled to proceed chemical analyses. Pioneer increased soluble carbohydrates, ethylic alcohol concentration, and buffering capacity. This inoculant decreased pH, ammonia, and acetic acid concentration compared to control. Pioneer […]

The objectives of the present study were to characterize and determine the parameters estimative of kinetics of carbohydrate degradation of alfalfa hay, elephant grass, tifton 85 hay, and corn silage, in different ratios of roughage:concetrate, using both in situ and in vitro technique. Five non pregnant non lactating goats, rumen cannulated, and averaging 58 kg were used during the experimental periods. A modified McDougall buffer was used for the in vitro assay to adjust pH to the values observed in […]

The experiment was carried out with 20 intact Holstein male calves, 75 days old, with mean live weight of 76 kg, submitted to the same nursing system before starting the experiment. The objective was to evaluate the relative size of internal organs and viscera of these animals fed diets containing 45, 60, 75 and 90% of concentrate. Diets were composed of coastcross hay, ground corn grain, soybean meal and mineral mixture. The experimental design was a randomized blocks, with four […]