ABSTRACT This experiment was conducted to evaluate the effects of stocking density and climate region on performance, immunity, carcass characteristics, blood plasma, and economic parameters of the Ross strain of broiler chickens. The effects of four climates (mild and humid, semi-arid, alpine, and hot and dry) and four densities (10, 15, 17, and 20 chicks/m2) were studied as a completely randomized design with 4×4 factorial arrangement of treatments. The results showed that the density had a significant effect on feed […]

The objective of this work was to evaluate the effects of different compaction degrees, inclusion of absorbent additive and wilting on the chemical composition of tanzania grass silages. The experiment was conducted using tanzania grass (Panicum maximum Jacq. cv. Tanzânia I) harvested at 60-65 days of growth. The forage was ensiled in experimental PVC silos fitted with Bunsen type valves, with capacity for about 4 and 8 kg each. The treatments consisted of three types of silages (control, 5% of […]

This work was carried out to determine the nutritional value of corn of different qualities, obtained by means of stratification in densimetric table, for broilers in different ages. The corns were designed as: MDA – high density corn; MDI – medium density corn; MDB – low density corn and MDT – total density corn, composed by 30% MDA, 60% MDI and 10% MDB. Two biological assays were carried out using the traditional total excreta collection method to determine the apparent […]

This trial was conducted to evaluate the effect of different stocking densities on performance of caged layers during the growing and laying periods and to verify the effects in the next phase. In the growing period (0-6 weeks), eight hundred and four chicks (Isa Brown ) were assigned to 100 x 80 x 35 cm cages, according to a completely randomized design, with four treatments (275.86, 250.00, 228.57, and 210.52 cm2 per bird) and four replicates. No significant effects of […]

It was conducted an experiment with pearl millet under grazing with different levels of N (0, 250, 300, 450 and 600 kg/ha). The objective was to study the dry matter (DM) production, the utilization efficiency, the recuperation rate, forage density and quality. The experiment was completely randomized design with two replications. Total density and per layer, the distribution and quality of leaf blade, stem and dead material components in distinct pasture layers (0-10, 10-20, 20-30, 30-40 and >40 cm above […]

The objective of this work was to evaluate the effects of density and feeding programs on the productive performance and carcass and prime cuts yield in broiler chickens at 42 days of age. A completely randomized design, in a 3×2 (density x feeding programs) factorial scheme, with three replications, was used. The densities were: 10, 12 and 16 birds/m2. The feeding was composed of program 1 (four diets): pre-initial, initial, growing and finishing and program 2 (five diets): pre-initial I, […]

The objective of this research was to study the economic effect of fingerlings I common carp (Cyprinus carpio L.) population stocked in high densities on winter time with artificial supplementation and chemical manuring. A completely randomized design with four treatments (5; 10; 15 and 20 peixes/m2) and nine replicates. The fishes were stoked with average weight of 0.48 g and length. and 3.15 cm respectively in all treatments with 45 days of age. The diets were formulated with 27% PB […]

This study aimed to evaluate impact of stocking density on final productivity in the production of mirror common carp in fattening stage, during the summer. A completely randomized design with three treatments (1, .5, .33 fishes/m2) and three replicates was used. The fish were stocked with an average weight of 2.40 g and average length of 5.35, 5.40 and 5.39 cm, respectively, in the treatments 1, 2 and 3, with 45 days of age. The diets were formulated with 27% […]

The objective of this experiment was to study the effects of population density on the productive performance of growing rabbits. One hundred and eight New Zealand White rabbits of both sexes, weaned at the 28 days of age and housed at the 35 days of age for an experimental period of 6 weeks, in galvanized wire cages with the dimensions of .6 x .6 x .375 m, equipped with automatic feeder and drinking nipple installed in partially shut housing. The […]