This investigation was carried out to study the feeding period influence on broilers performance, viscera development, and carcass composition. A total of 630 broiler chickens, Cobb-500â strain, were allocated in three feeding programs from 8th day to 50th day of life: ad libitum (AL – food available 24 hours), diurnal feeding (DF – food provided ad libitum from 7 am to 7 pm and fed restricted from 7 pm to 7 am) and nocturnal feeding (NF- food provided ad libitum […]

Effects of adaptation periods to sodium lasalocid and its ionophorum levels were evaluated on ruminal fermentation, using four Holstein-Zebu cross-breed cows. Latin square was the experimental design used, with four periods of six weeks, in which isolated data from the first, second, third and fourth weeks were used to evaluate periods of adaptation, and the last two destined to eliminate residual effects. Treatments were no supplementation and supplementation with 50, 100 and 200 mg of sodium lasalocid/ head/day, and rumen […]

Three experiments, an essay of digestibility, other of morphometrical intestinal evaluation and of performance were carried out to evaluate the effects of inclusion of Calsporin® (0,03%), fumaric acid (1,5%) and zinc bacitracin with 15% of activity (0,10%) in diets, separated or combined, on utilization of dry matter, crude protein, neutral detergent fiber, gross energy and the morphometrical jejunal analysis and the essay performed of growing rabbits. For the digestibility essay 64 White New Zealand rabbits were used, half of each […]

Dairy goat production in Brazil, although firmly established since a few decades, has proved to be totally dependent on foreign countries for genetic improvement. Most herds presently producing are based on imported animals, and genetic refreshment is obtained through imported semen. No information is available on the genetic values and their evaluation along the years. In this paper, heritability and repeatability estimates, obtained through REML, are reported for milk yield. The values were 0.21557 and 0.21564, respectively. The BLUP method […]

An experiment was carried out to determine TME and TMEn values of integral mesquite pods meal (MPM) in cecectomized cockerels by Sibbald method. A second experiment was conducted to examine the effects of MPM inclusion (0, 5, 10, 15, 20, 25 and 30%) in pelleted and mashed diets on laying hens performance. In the experiment 1, values of TME and TMEn in raw MPM were 2819 and 2806 kcal/kg, respectively, while cellulose and lignin contents were five- and four-fold higher […]

The objectives of this work were to evaluate the chemical composition alteration, the nitrogen and carbohydrate fractions changes, to estimate the digestion rate of non-fiber carbohydrate (NFC) and fiber carbohydrate (FC), to determine the in vitro dry matter digestibility (IVDMD) and to estimate the TDN of corn silage with different grain proportions. The silage were done in the following proportions: 0, 15, 30, 45 e 60% of grain. The amount of dry matter (DM), nitrogen compounds (N), ether extract (EE), […]

The objective of this study was to study the morphology and the localization of acid phosphatase at calves anterior small intestine, from birth to intestinal closure. Fifteen male dairy calves were used in this study, which were aged: unsuckled neonatal, three hours after colostrum ingestion and three days old. Vacuolated cells from duodenum to medium jejunum could be found in the newborn calf, which have shown absorbed material after colostrum ingestion. Changes at the morphological characteristics and the initiation of […]

One type of commercial silo and three types of experimental silos were used for determination of chemical composition and fermentation characteristics of elephant grass (Pennisetum purpureum) (33.0% DM and 4.2% CP) ensiled in two different densities (400 or 600 kg of silage/m3): 1) commercial bunker silo sampled at 30 (top) and 60 (deep) cm from the top; 2) plastic silo with bulsen valve; 3) plastic bag; and 4) concrete pipe. A completely randomized design was used. The concrete pipe silo […]

An experiment was carried out at UNESP, Jaboticabal Campus to evaluate the effect of a microbial inoculant on aerobic stability of wilted grass silage (Pennisetum purpureum, Schum). The grass was cut with 96 days of growing, remaining under sun action 5 hours to wilt. Silages were made in plastic silos, 0.2m3 capacity, that received (CI) or not (SI) inoculant at the ensilage time. For the study of aerobic deterioration, each silo was subdivided in three levels and the silages were […]

The objective this work was to evaluate the effect of protein supplements varying in ruminal degradabilities (high-75%, medium-55% and low-35%) fed at three levels (0.5, 1.0 and 1.5 kg/day) on ruminal pH, N-NH3 and NDF degradability of forage, with steers grazing Brachiaria brizantha cv. Marandu during rainy season. The experiment design was a randomized complete block with three replications (grazing periods) and the supplemented treatments were arranged in a factorial 3 x 3. Ten rumen-fistuled crossbred steers with 463 kg […]