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Estudo dos níveis de energia e proteína em dietas para frangos de corte no Tropico Semi-árido

Tue, 01 Jan 1991 00:00:00 GMT

Título: Estudo dos níveis de energia e proteína em dietas para frangos de corte no Tropico Semi-árido Autor(es): Oliveira, Luciano Martins de Abstract: The present experiment was conducted afc the poultry facilities of the Departamento de Zootecnia of the Universidade Federal do Ceará, Brazil, with the objective of evaluating different levels of energy and protein in diets for broilers, explored under tropical conditions. [...] Tipo: Dissertação

Fontes alternativas de cama de frangos para alimentação de ruminantes

Tue, 01 Jan 1991 00:00:00 GMT

Título: Fontes alternativas de cama de frangos para alimentação de ruminantes Autor(es): Alves, Arnaud Azevêdo Abstract: This work was conducted at Departamento de Zootecnia of the Universidade Federal do Ceará, Brasil, with the aim of evaluate productive performance and production of litter and waste for Hubbard broilers explored over dtfferenfcc material G for broiler litter and the nutritive value of this for ruminants. [...] Tipo: Dissertação

Ácidos orgânicos e suas associações com prebiótico ou extrato vegetal na alimentação de poedeiras comerciais leves

Thu, 01 Jan 2026 00:00:00 GMT

Título: Ácidos orgânicos e suas associações com prebiótico ou extrato vegetal na alimentação de poedeiras comerciais leves Autor(es): Mariano, Lidia Sarah Dias Abstract: The aim of this study was to evaluate the effects of adding combinations of organic acids, or organic acids combined with a prebiotic or plant extract, to the diet of commercial laying hens between 40 and 70 weeks of age. A total of 384 NOVOgen White laying hens were distributed in a completely randomized design with eight treatments and six replicates of eight birds per experimental unit. The treatments were as follows: T1 (negative control) – diet without growth promoter; T2 (positive control) – diet with growth promoter (0.05 g/kg of Halquinol); T3 – 1.81 g/kg of formic acid + 0.44 g/kg of propionic acid; T4 – 3.62 g/kg of formic acid + 0.88 g/kg of propionic acid; T5 – 1.10 g/kg of formic acid + 0.66 g/kg of propionic acid + 0.86 g/kg of butyric acid + 0.72 g/kg of prebiotic; T6 – 1.65 g/kg of formic acid + 1.0 g/kg of propionic acid + 1.30 g/kg of butyric acid + 1.08 g/kg of prebiotic; T7 – 1.58 g/kg of formic acid + 0.30 g/kg of propionic acid + 0.10 g/kg of plant extract; and T8 – 3.16 g/kg of formic acid + 0.60 g/kg of propionic acid + 0.20 g/kg of plant extract. The prebiotic used was inulin-based, and the plant extract consisted of oregano essential oil. The variables evaluated included productive performance, external and internal egg quality, lipid stability of fresh and stored egg yolks (TBARS), antioxidant potential of fresh and stored eggs (phenolic compounds, DPPH, and ABTS), lipid stability of the liver and reproductive organs (TBARS), and bone quality. A significant effect of treatments was observed only for yolk color, with increased yolk color intensity in hens receiving the mixture of organic acids associated with plant extract at the 0.10 % inclusion level. It can be concluded that the addition of organic acids and their associations with prebiotic or plant extract at the evaluated levels did not influence productive performance, external and internal egg quality, yolk lipid stability, egg antioxidant potential, lipid stability of the liver and reproductive organs, or bone quality of laying hens. Tipo: Dissertação

Manejo de abelhas solitárias coletoras de óleo Centris analis para a polinização dirigida de acerola

Wed, 01 Jan 2025 00:00:00 GMT

Título: Manejo de abelhas solitárias coletoras de óleo Centris analis para a polinização dirigida de acerola Autor(es): Silveira, David Rezende da Abstract: The oil-collecting bee Centris analis is native to Brazil, successfully colonizes trap nests in aggregations, has a multivoltine life cycle, and shows ample potential to be used for the pollination of both native plants and agricultural crops, especially acerola (Malpighia emarginata DC.). Therefore, the aim of the present study was to identify intrinsic or environmental stimulating factors that could help develop more effective management techniques for this species in urban and rural environments, in order to maximize the performance of C. analis in agricultural pollination. To this end, 833 trap nests were initially used, differentiated into seven length and diameter classes, and installed in three nesting sites at the Bee Laboratory of the Universidade Federal do Ceará (UFC), between August 2019 and March 2024, to investigate parameters regarding the nesting habits and life cycle of this species in an anthropized environment. The results showed that the year of nesting and the ratio between the trap nest class and the nidification month significantly influenced the emergence time of the offspring (p<0.05). Trap nests of 197 mm in length had a higher number of brood cells. Additionally, the offspring mortality was affected by factors such as the length of the trap nests and the incubation site used. An increase in the number of cells per nest (p<0.05) and in the average environmental temperature (p<0.05) led to a reduction in vestibular cell length. Furthermore, 768 trap nests differentiated into two classes of length and diameter were used and installed in an acerola orchard in Sapupara, a district of the Municipality of Maranguape – CE, from October 2020 to February 2023, with a final visit conducted in August 2023, to investigate the correlation between the nidification of female C. analis and environmental variables with the production of acerolas on a rural property. Trap nest colonization was significantly influenced by flowering occurrence (p<0.05), the intensity of flowering (p<0.05) and rainfall (p<0.05). The bees preferred nests that were 197 mm long and 6.0 mm in diameter. The harvest of acerolas increased after the breeding site was established, except when disruptive environmental events occurred, and was positively influenced by the intensity of flowering (p<0.05). It is concluded that managing intrinsic variables and continuously monitoring environmental parameters can enhance the nesting efficiency of C. analis in trap nests, as well as its subsequent field activity and agricultural pollination. These bees respond particularly well to intrinsic or environmental stimulating factors that influence the control of the internal temperature of the trap nest, the available space for oviposition, and the availability of foraging resources in the environment. Tipo: Dissertação