Thirty ¾ Canchim + ¼ Nelore young bulls with 417 kg of body weight and 15 months of age, were confined during 84 days. The animals were fed with diets composed with corn silage, corn grain, cottonseed meal, soybean meal, whole soybean and mineral mix, adjusted in agreement with the recommendations of the Metabolizable Protein System (MP), Cornell Net Carbohydrate and Protein System (CNCPS) and Intestine Digestible Protein System (PDI), for predicted body weight gain of 1.3 kg/head/day. The daily […]

The objective of this work was to evaluate the ruminal disappearance and nitrogen intestinal digestibility of 18 concentrate feedstuffs and four grasses, using an in vitro inhibitor with HCL-pepsin-pancreatin solutions and the three-step method. The disappearance of nitrogen compounds of feedstuffs was determined at 0 and 2 hours using 1.875 mg of N incubated on each three vessels. One of the vessels was submitted to intestinal digestion. On the second method, approximately 5 g of samples were incubated, during 16 […]

This study was run to evaluate the physiological response and expression of hepatic and brain Hsp70, of 20 Naked neck (Na/na) and Hubbard-Petersen broiler chicks (2 to 5 days of age), exposed or not to 36-37°C. The trial was conducted during four days and the birds were exposed to high temperature during 5 hours. Liver and brain tissue samples were collected at the end of the stress period and analyzed for Western Blotting for determination of Hsp70 level. No association […]

The research was carried out at the Centro de Assessoria e Apoio aos Trabalhadores e Instituições Não-Governamentais, Alternativas (CAATINGA) in the Ouricuri county, state of Pernambuco, Brazil, in the period of 1989-1994, with the objective of comparing different practices of woody vegetation manipulation, as alternatives of sustainable pastoral management of caatinga and determining their viability to the small producers. Plots measuring 25 x 100 m had the woody vegetation submitted to the following experimental treatments: deforestation, thinning, thinning-lowering, lowering and […]

Seventeen Nelore heifers were submitted to a superovulation protocol, beginning on the ninth day of the estrous cycle. Eight heifers were superovulated with 250 IU (T1) and nine with 500 IU (T2) of FSH. The animals were monitored by ultrasonography during the superovulation period and on the embryo collection day. There were no differences on the recovery rate and quality of the structures collected among the animals of the two treatments. Animals treated with 250 (T1) and 500 IU (T2) […]

Four hundred Avian Farms male broiler chicks from 1 to 21 days of age, with average weight of 35 ± 0.15 g, were kept under high temperature environment, where the air temperature was maintained in 29.1oC, the relative humidity in 59.7 ± 3.16%, the black globe temperature in 28.9 ± 0.42oC and the black globe humidity index (BGHI) in 77.4 ± 0.59. A completely randomized design, with five treatments (1.04; 1.10; 1.16; 1.22 and 1.28% of total dietary lysine level), […]

Two trial experiments were conducted to determine a reference diet for nutrient requirement studies of Piaractus brachypomus. In the 1st experiment four diets elaborated with purified ingredients (H-440 with 47% PB, C-102 with 41% PB, NRC, with 37% PB and IALL-1 with 32% of PB) and a diet control (32% of PB) with common ingredients, were tested. In the 2nd experiment the diet IALL-1 was used as base for the formulation of three experimental diets. Diet 2 contained vitamin C […]

The objectives of this work were to evaluate effects of replacing corn by cassava by-product meal, in diets of Saanen lactating goats, on milk production and composition (total solids and crude protein), nutrient apparent digestibility and total digestible nutrients (TDN) of diets. Four multiparous goats fitted with ruminal cannula, with 100 days of lactation, were used. The design was a 4 x 4 Latin square and treatments as following: 0, 33, 67 and 100% replacement of corn by cassava by-product […]

The objective of this research was to evaluate two levels of lipids (3 and 7%) in the diet of milking cows, and to evaluate in the 7% lipids two lipid sources (crushed soybean and soybean oil), on milk production and composition, ruminal parameters, ammonia production by mixed ruminal bacteria and dry matter intake. Six mature Holstein cows, purebred or crossbred, 500 kg of live weight, 30 days after calving and milk production of 20 l/day, were assigned to a two […]

Quantitative carcass traits of cull cows from two breeding systems, straightbreds (Charolais – C and Nellore – N) and crossbreds F1 1/2 CN and 1/2 NC, were evaluated. The cows were feedlot finished and fed with a 10% crude protein diet with 65% roughage, sorghum silage, and 35% concentrate. Objective and subjective measurements were taken from the cold carcasses. Charolais females showed higher slaughter weight (522.6 vs 462 kg) and cold carcass weight (255.8 vs 237.5 kg), conformation score (10.7 […]