The objective of this work was to evaluate average daily gain (ADG) and carcass traits in Nellore and Red Norte steers, finished in feedlots and to evaluate performance predictions by using the systems BR-CORTE, CNCPS 5.0 and NRC (2000). It was used 41 steers: 19 Nelore animals with initial body weight of 361 ± 31 kg and 22 Red Norte animals with initial body weight of 367 ± 30 kg. Adaptation period lasted 28 days. Animal performance evaluation was composed […]

It was evaluated in this work the effects of levels of inclusion and exposure times of sugarcane to calcium oxide on the performance of Nellore heifers, digestibility of dietary components and synthesis of ruminal microbial protein and it was compared titanium dioxide to chromium oxide to estimate the individual intake of concentrate. It was used 30 Nellore females at approximately 24 months of age and average body weight of 285 ± 31 kg and age of 24 months housed in […]

It was aimed to evaluate the effect of inclusion and times of sugar cane exposition to whitewash on intake and total and partial digestibility of nutrients and ruminal parameters and to compare titanium dioxide and chromium oxide as markers to estimate fecal dry matter excretion and dry matter abomasal flow. It was used six rumen and abomasum cannulated Nellore females, with average body weight of 250 ± 19 kg, distributed in an incomplete 6 x 6 latin square design. The […]

The objective of this research was to evaluate the dry matter intake (DMI) and nutrient consumption in Nellore and Red Norte steer finished in a feedlot and compare the actual and predicted values by NRC (2000), CNCPS 5.0 and BR-CORTE systems. Forty-one animals, 19 Nellore and 22 Red Norte steers, with initial live weight of 361 ± 31 kg and 367 ± 30 kg, respectively, were used. The experiment lasted 84 days, with 28 days for adaptation and 56 experimental […]

The objective of this work was to test the efficiency of enriched and purified lignin, Lipe®, as external indicator in order to estimate the apparent digestibility of the nutrients in equine diets, compared with the total feces collection and the chromic oxide methods. Six female Mangalarga Marchador with average of two years of age and average weight of 331 kg were used. The diet was alfalfa hay, commercial grain and mineral salt. The experimental period was of 29 days, the […]

The objective was to evaluate the estimate of digestion and microbial production by using indigestible neutral and acid detergent fiber (iNDF and iADF respectively) and to compare microbial production estimated by purine bases in the omasum and urinary excretion of purine derivatives. Four rumen and ileum fistulated Holstein-Zebu heifers with average initial 220 kg LW was maintained in confined regime fed diet based on Tifton (Cynodon spp.) hay, offered ad libitum and 1kg of concentrate (27% CP). The experiment lasted […]

The objective of this experiment was to use n-alkane to estimate accurately and precisely the botanical composition of dietary forage in sheep fed different proportions of Arachis pintoi Koprov & Gregory cv. Amarillo and Brachiaria decumbens Stapf (0, 15, 30, 45 e 60% of Arachis pintoi). Twenty lambs were used in a completely randomized design with 10 days for diet adaptation and 5 days for fecal collection. Both fecal composites and hay samples were analyzed for n-alkane concentration. Dietary forage […]

The objective of this trial was to use n-alkanes to estimate dry matter intake (DMI) and DM digestibility in sheep. It was also of particular interest to compare two methodologies of fecal collection (total collection vs. grab samples) as well as to identify which n-alkanes best estimate DMI and DM digestibility. Twenty animals were assigned to a completely randomized design and were fed diets containing different proportions of forage peanut (Arachis pintoi Koprov & Gregory cv. Amarillo) and signalgrass hays […]

This research aimed to compare dry matter digestibility coefficient (DMDC) of horse diets by total feces collection (TC) and internal markers, indigestible cellulose (iCEL), indigestible acid detergent fiber (iADF) and acid insoluble ash (AIA). Sixteen adult mares of Mangalarga Marchador breed averaging from 3.5 to 18.4 years and 394.80 ± 46.22 kg were assigned to a randomized block design with four replicates. Diets were formulated to be isoprotein and isoenergetic and composed of coastcross hay (Cynodon dactylon cv. Coast cross) […]

This trial was carried out to determine the composition of n-alkanes (C24 to C36) in hypothetical diets comprising of pure Brachiaria brizantha Stapf. cv. Marandu and Arachis pintoi Koprov & Gregory. cv. Amarillo and mixtures of these two spececies with 15%, 30%, 45%, or 60% of Arachis pintoi); it also intended to identify the combination of alkanes that allows to calculate the botanical composition of diets with the smallest residual value (real less estimated values). The forages were sampled in […]