The objective of this study was to evaluate the route of administration of mannan-oligosaccharides in the diet of dairy calves and their effects on performance and plasma parameters indicative of rumen development. Following birth, twenty-four male Holstein calves were used in a completely randomized design and assigned to the following treatments: Control; 4 g/d Bio-Mos® (Alltech Biotech.) added to starter concentrate; and 4 g/d Bio-Mos® mixed into milk replacer. Animals were housed in individual hutches with free access to water, […]

The objective of the present study was to evaluate the influence of a probiotic product (composition: Lactobacillus acidophillus (3.5 × 1011 CFU), Streptcoccus faecium (3.5 × 1011 CFU) and Bifidobacterium bifidum (3.5 × 1011 CFU)) on broiler performance. A total of 1200 one-day-old broilers were reared until 42 days of age, and distributed in a completely randomized experimental design with 3 treatments (antibiotic, probiotic and control) with 10 replicates of 40 birds each. Weight gain, feed intake, feed conversion ratio […]

The objective of this trial was to evaluate the effects of the inclusion of calcium oxide (CaO) and/or L. buchneri (LB) on the losses and chemical composition changes of in natura and burned sugar cane silages. Silage treatments were: in natura sugar cane without additive (IS), with Lactobacillus buchneri (ISLB), with calcium oxide (ISCaO) equivalent to 1% of natural matter, and the combination of LB and CaO (ISLBCaO). Experimental design was completely randomized in a factorial scheme (2 × 4) […]

The effect of the additives Yucca schidigera (YSC) and zeolite (clinoptilolite) on digestibility, fecal texture and odor, blood parameters and urine pH of domesticated felines was evaluated. The experiment was conducted in a randomized block design, with twenty-one cats, in two periods, distributed in seven treatments: moist commercial feed (control); control + 125, 250 and 375 ppm YSC; and control + 0.5; 0.75 and 1.0 % zeolite. No differences were observed between the diets regarding apparent digestibility coefficients of nutrient, […]

This work was carried out to evaluate the use of Bacillus subtilis probiotic C-3102 (1010cfu/g) in diets with or without growth promoters on the performance of broilers in the period from 1 to 42 days of age. It was used 1,200 Cobb line broilers, distributed in a complete randomized block with five diets: negative controller (without promoters); Bacillus subtilis (30 g/t ration); Bacillus subtilis (50 g/t ration); Bacillus subtilis (30 g/t ration) + colistin (10 ppm); avilamycin (10 ppm) + […]

The objective of this study was to determine the interference of extract additives of Yucca schidigera and zeolites (Clinoptilolita) on the palatability and digestibility of commercial rations and to evaluate their capacity for reducing fecal odor and improving of fecal consistency of dogs. It was used Beagle breed adult dogs with average weight of ±12.51 kg in 3 experiments, all of them in a completely randomized design. In the palatability test, performed on the first ten days, it was used […]

It was evaluated the effect of diets supplemented or not supplemented with ractopamine and digestible lysine on the performance and carcass characteristics of finishing pigs. A total of 50 barrows and 50 gilts (90.2 kg ± 3.5 kg) were used. In the growth performance trial, a randomized block design was utilized in a 5 x 2 factorial arrangement, consisting of five levels of digestible lysine (0.68; 0.78; 0.88; 0.98 and 1.08%) and two levels of ractopamine (0 and 5 ppm), […]

It was aimed in this work to evaluate bacterial strains tolerant to products based on propolis (LLOS) through the isolation, morphological and biochemical characterization techniques in diets with roughage:concentrate ratio 100:0 and 50:50. For roughage diets, the products LLOSC1 and LLOSB3 were evaluated, and for 50:50% diets, the products LLOSC1, LLOSD1, LLOSA2, and LLOSC3, which differed in alcoholic concentrations (1, 2 and 3) and propolis (A, B, C and D) concentrations. The ruminal liquid was anaerobically incubated at 39°C for […]

The objective of this work was to study the effect of the administration of products based on sodium monesin or propolis LLOSB3 and LLOSC1 in two concentrations (B and C, in which B was less concentrated than C) and two alcoholic extractions (1 and 3, in which 1 was less concentrated than 3) on intake, total and partial digestibility, and ruminal characteristics in buffaloes fed diet based on roughage. It was used four castrated crossbred buffalo with average weight of […]

Scientific advances in nutrition of dairy cows in the first decade of the XXI century have occurred. This paper will review the most common additives fed to transition cows to decrease the incidence of metabolic disorders, which will be discussed separately with emphasis on their mechanisms of action, utilization and efficiency. Some changes on protein in the 2001 updated version of the Nutrient Requirements of Dairy Cattle to reach better precision of the nitrogen and amino acid requirements of lactating […]