Thirty-two non castrated Ile de France lambs fed corn silage or sugar-cane based diets with two roughage:concentrate ratios (60:40 or 40:60) were used. The animals were kept individually confined with control of the supplied food and leftovers, weekly weighted for determination of the daily weight gain and food conversion. Simultaneously, it was carried out digestibility and metabolism trials to determine the nutrient intake and digestibility and nitrogen balance of the experiment diets. The weight gain (294.6 g/day) was higher for […]

The objective of this study was to evaluate the use of fat sources in rations for lactating cows on the productive performance and composition of milk protein fraction. Twelve Holstein cows were used, grouped in three balanced 4 × 4 Latin squares, fed with the following rations: control; refined soybean oil; whole raw soybean; and calcium salts of unsaturated fatty acid (Megalac-E). Dry matter and nutrient intake, and daily milk production were evaluated. The samples used to analyze milk composition […]

This work aimed to study the annual variation of temperature of the coat surface and other traits of coat in Holstein cows managed in a tropical environment by separately considering black coat and white coat. It was measured the coat thickness (mm) characteristic, hair length (mm), hair number (hair/cm2) and coat surface temperature on 191 crossbred cows with 7/8 and 31/32 Holstein composition distributed in 3 herds in a semi-arid environment. Less dense coats with shorter, flattened hair occurred predominantly […]

It was evaluated the inclusion of rough wheat bran at 0.0; 8.9; 19.8 and 31.7% levels replacing corn in goat diets. Twenty-four crossbred non-castrated male goats averaging 20 kg body weight were used. They were allocated in individual cages as a complete randomized design with four treatments and six replicates during for 74 days. The digestibility coefficients were obtained through total collection of feces. The inclusion of rough wheat bran had a quadratic effect on the intake of dry matter […]

The objective of this work was to evaluate the replacement of whole goat milk for cattle cheese whey in the artificial nursing of alpine kids. The animals were distributed in a complete randomized design in a 4 × 2 factorial arrangement made up with four levels of goat milk replacing for cheese whey (0, 15, 30 and 45%) and two sexes (three males and four females per treatment). The inclusion of cheese whey in the diet did not affect the […]

This study was conducted in order to evaluate the effects of replacing dicalcium phosphate by rock phosphate in diets of growing steers. It was determined the following aspects: apparent digestibility of diets; phosphorus (P), calcium and fluorine apparent absorption; ruminal pH; ruminal ammonia concentration; microbial efficiency and plasma P. Five rumen fistulated Holstein steers weighting 275 – 283 kg were used. Experimental design was a 5 × 5 Latin square and diets consisted of 0, 25, 50, 75 and 100% […]

The aim of this work was to evaluate the effect of dietary chromium supplementation on performance, carcass yield, meat quality, cholesterol level on the breast and blood biochemical parameters on broilers. It was used a complete randomized experimental design with five levels of chromium tripicolinate (0, 150, 300, 450 and 600 µg/kg of chromium) and six replicates with 50 broilers per experimental unit. The use of chromium tripicolinate had no effect on the performance of broilers. The levels of chromium […]

The trial was carried out to evaluate different blends of plants extracts in broilers diets. It was used 1,350 broilers distributed in a randomized block design with six replicates and five diets, one without additive and the four others, each containing one of the following additives: 10 ppm of avilamycin; 200 ppm of a product containing essential oils of carnation, thyme, cinnamon and microencapsulated capsicum; 100 ppm of a product containing essential oils of synthetic cinnamaldehyde and carvacrol and capsicum […]

This work aimed to study the effects of L-glutamic acid (L-Glu) and K vitamin on the biochemical composition (collagenous proteins, CP; non collagenous proteins, NCP; and total proteins, TP) in femurs of broilers. The experiment which lasted for 14 days, was carried out in a completely randomized design in a 2 × 4 factorial with two levels of L-glutamic acid (6.25% and 12.5%) combined with four levels of K vitamin (0.02; 0.2; 2.0 and 20.0 mg of feed) each combination […]

In this experiment it was aimed to determine the best levels of digestible lysine for laying hens in production period. Performance, nutrients intake, metabolism, egg quality, blood parameters and development of reproductive tract for 160 Hy-Line W-36 hens at 25 weeks of age. Hens were distributed in a completely randomized design with four levels of digestible lysine (600, 700, 800 or 900 mg of Lys/kg) and four replicates by using a split spot scheme was used at evaluation of nitrogen […]