Four trials were conducted to determine the requirements of available phosphorus (aP) of female broiler chicks from 1 to 10 (exp.1), 11 to 21 (exp.2), 22 to 33 (exp.3), and from 34 to 46 (exp.4) days of age, keeping the calcium:available phosphorus ratio equal to 2:1. In each trial, 480 Cobb broilers were randomly allotted in a completely randomized design with 6 treatments, 8 replicates and 10 birds per pen. The levels of aP ranged from 2.0 to 5.5 g/kg […]

It was studied, in this work, the effects of supplementation of probiotics on the performance, on the pH of crop content, on the morphometry of the ileum and on the number of enterobacteria in the cecum of the broilers. Out of the 120 studied birds, 60 belonged to the test group and 60 to the control group. At 1, 7, 12, 18, 23 and 28 days of age, the chickens and rations were weighed and mortality and morbidity were determined. […]

The Brazilian aquaculture is the second (Chile is the first one) in South American production, supported basically by production chains of shrimp and tilapia culture. Brazil produced, in 2007, 95691.0 tons of tilapia, representing 45% of the continental aquaculture. Aquaculture from small and medium producers has shown in recent years changes on farming systems. By the end of the 90s, it was based on semi-intensive ponds and dams. From the year 2000, tilapia culture in cages highlighted, especially in Union […]

This experiment aimed at validating the relationship between digestible amino acids with the digestible lysine proposed on the basis of the ideal protein concept. This experiment used 120 lactating sows distributed in a complete randomized block design with six treatments and 20 repetitions and one sow per experimental unity. The diets were formulated based on a reference diet – which contained 19.5% of crude protein (CP) and 0.95% of digestible lysine supplemented with digestible methionine, threonine, tryptophan and/or valine to […]

The effects of four levels of concentrate – LC (0, 1, 3 and 5 kg/cow/day) and two of crude protein – CP (11 and 13% crude protein in total dry matter) on the intake, digestibility and performance of milking cows were evaluated. Eight crossbred Holstein-Zebu cows with 520 ± 40 kg were distributed in an 8 × 8 Latin square in eight 10-day periods for evaluation of effects of treatment, animal and period. The experiment was conducted on elephant grass […]

The objective of this work was to verify the effects of lipid sources (ground soybean and soybean oil) added to the diet on the fatty acids profile of milk fat, specially in the increasing of CLA. Six multiparus 7/8 Holstein-Zebu cows, 30 days after calving, with average body weight of 500 kg and average milk production of 20 kg/day, were used. The animals were divided in three groups in order to receive isoprotein and isocaloric diets (treatments), in which control […]

The objective of this work was to verify the effect of lipids sources (whole soybean meal – WSM; and soybean oil – SBO) added to the diet on changes in milk production and its physical-chemical characteristics. Six multiparous 7/8 Holstein-Zebu cows, averaging 30 days post calving, 500 kg body weight and daily milk production of 20 l were used. The animals were divided into three groups and received three isoproteic and isocaloric diets (treatments): control (3% ether extract), WSM (7% […]