The objective of this work was to determine the nutritional value of corn of four different qualities, obtained by stratification in densimetric table, for broilers at different ages. The corns were designed as: MDA – high density corn; MDI – medium density corn; MDB – low density corn and MDO – original density corn, composed of 25% MDA, 50% MDI and 25% MDB. Three biological assays were carried out by using the traditional total excreta collection method for determination of […]

This research aimed at generating and evaluating prediction equations to estimate metabolizable energy values in poultry offal meal. The used information refers to values of apparent and true metabolizable energy corrected for nitrogen balance (AMEn and TMEn) and for chemical composition of poultry offal meal. The literature review only included published papers on poultry offal meal developed in Brazil, and that had AMEn and TMEn values obtained by the total excreta collection method from growing broiler chickens and the chemical […]

The objective of this work was to evaluate the validity of prediction equation of metabolizable energy requirements, that was previously determined at Faculdade de Ciências Agrárias e Veterinárias of UNESP -Jaboticabal. The pullets were distributed in a randomized design with three treatments and six replication of 18 pullets from 3 to 8 wk-age, 15 birds from 9 to 12 wk-age and 12 birds from13 to 18 wk-age. The treatments consisted of comparing the performance of pullets feeding according to: ad […]

An experiment was carried out to estimate the relations between broiler carcass weight and thighs+drumsticks, breast+bone+skin, and breast meat by the linear model. Eight hundred and sixty and four male poultry of Arbor Acres strain, from 22 to 42 days of age, were assigned to a completely randomized design in 3x4factorial scheme. Corn and soybean meal based diets were prepared to contain 2900 kcal ME and 15.43; 17.26; 19.60; and 22.60% CP; 3,100 kcal ME and 16.49; 18.45; 20.95; and […]

The objective of this study was to determine the protein requirement for broiler breeder hens using factorial method. The requirement of crude protein for maintenance (CPm) was determined using nitrogen balance technique in metabolism assay. The birds were fed with four protein levels in order to get a positive, a close to zero and a negative nitrogen balance. To determine the crude protein weight gain requirement (CPg), two experiments were carried out. The first was calculate to determine the net […]

The objective of this study was to evaluated a crude protein requirement equation elaborated for broiler breeders. The experiment was conducted with 600 31-weeks old Hubbard HI-Y broiler breeders in a completely randomized experiment with three treatments and five replications. The treatments were: T1- Crude protein supply according to lineage recommendation manual (control), T2 ¾ Crude protein supply according to a prediction equation adjusted in function of the performance data of the standard treatment, and T3 ¾ Crude protein supply […]

The objective of this work was to evaluate the weight gain, feed efficiency and carcass characteristics of dairy steers. Sixteen Holstein dairy steers with initial average age and weight of 20 months and 202,0 kg were used. The animals were divided into four groups. One group of animals was slaughtered at the beginning of the trial (AI) and three groups were ad libitum fed (AL-1, AL-2 and AL-3) and they were slaughtered when the individual weights of 250.0, 300.0 and […]