The experiment was conducted to evaluate the effects of moisture levels at harvest and drying temperatures of corn on its chemical composition and apparent metabolizable energy corrected to zero nitrogen retention (AMEn) to broiler chickens. The corn was harvested with 35%, 25%, 18%, 15.3% and 14.3% of moisture and submitted to drying temperatures of 100, 70 and 40 ºC. The moisture levels of 15.3% and 14.3% of corn were not submitted to drying and the last value represented the treatment […]

The research was carried out to evaluate the ileal (ILEALDC) and total (TOTALDC) digestibility of the starch and the activity of the enzymes amylase (ACAMY) and maltase (ACMAL) in rabbits of 35 and 45 days old, fed with starch from the corn or cassava. In each assay 20 New Zealand White rabbits were used, being ten males and ten females, housed individually in wire cages and distributed in an entirely random arrange. At the end of the experimental period, the […]

The objective of this paper was evaluate ammonia concentration, pH of ruminal liquid and microbial synthesis efficiency in diets with different energetic sources: corn (CO), corn/cassava hulls (CC), cassava root (CR) and cassava by-product flour (CB). Four Holstein steers (270 kg) were used, in a 4 X 4 Latin Square design. The marker utilized for determination of duodenal and fecal flow was the acid insoluble ash. There was not effect in the ruminal pH of the experimental diets, however smaller […]

Twenty Holstein intact calves, averaging 160 days old and initial live weight of 163 kg, were assigned to a completely randomized design to evaluate the effect of five replacement levels (0, 25, 50, 75 and 100% in dry matter basis) of corn for cassava meal on the intake and apparent digestibility of dry matter, crude protein, neutral detergent fiber, starch and gross energy of the experimental diets. There was no effect of replacement levels of corn for cassava meal on […]

This study was run to evaluate the effect of inclusion of an enzymatic cocktail, containing proteases, amilases and cellulases (Vegpro) in broiler diets. The cocktail was added with the ration of 1 kg per 200 kg of soybean meal. Two thousand and forty female Ross chicks were distributed in eight treatments with seven replicates each. A split-plot experimental design was used. Treatments consisted of T1 ¾ control (no enzyme added), T2 ¾ diet five percent lower in energy, protein and […]

The digestibility coefficients and thetrue digestible amino acids contents of corn and corn byproducts were determined by using cecectomized adult cockerels. Each one of the 11 feedstuffs evaluated was fed to six cockerels, consuming 15 g at 8a.m. and 15 g at 4p.m. after fastening by 24 hours. Simultaneously, six cockerels were fasted to determine metabolic and endogenous losses. After determination of the digestibility coefficients and calculation of the digestible amino acids, prediction equations were simulated to predict the corn […]

Two metabolism assays were carried out in order to evaluate the aparent metabolizable energy (AME) and true metabolizable energy (TME) values of 11 feedstuffs (corn and corn byproducts and of the millet samples) by using the traditional method of excreta collection with growing chickens and the forced feeding method, by using adult cockerels (Sibbald method). In the first assay, 540 male Hubbard chickens fed the experimental diets in four replicates with ten birds in each experimental unit and the basal […]

Total and partial digestibility of diets combining the starch sources of high degradability (dried cassava hulls) and low degradability (corn), with nitrogen sources of high (yeast) and low (cottonseed meal and meat and bone meal) degradability, in a 2 x 2 factorial arrangement, were evaluated. Four Holstein steers (334 kg) fitted with ruminal and duodenal cannulas, in a 4 x 4 Latin Square were used. Chromic oxide was used as a marker for drying matter flow. Interactions of starch and […]

The effect of diets content 50% of corn silage and 50% of concentrate, resultant of combination of starch sources of high degradability (dried cassava hulls) and low degradability (corn), with nitrogen sources of high degradability (yeast) and low degradability (cottonseed meal and meat and bone meal), on pH, ammonia and microbial efficiency, was evaluated. Four Holstein steers (334 kg), fitted with ruminal and duodenal cannulas, in a 4 x 4 Latin Square experimental design were used. Intake was limited to […]

Two trials were carried out, Trial I (digestibility) and Trial II (performance). In Trial I, 16 castrated male crossbreed piglets were used. They were weaned at 21days and weighing on average of 6.0kg. Two piglets were kept in each metabolic cage. Studding pre-gelatinized corn meal (PGCM), we found these results: digestibility coefficient of dry matter, crude protein and crude energy was 89.2, 78.7 and 90.2%, respectively. Digestible dry matter (81.8% as-fed basis); digestible protein (6.55% as-fed basis) and digestible energy […]