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

2026-05-13T23:19:55Z

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

2026-05-07T16:37:33Z

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

Produção e teor de flavonóides da própolis coletada por Apis mellifera em três fitofisionomias no estado do Ceará

2026-04-14T11:40:37Z

Título: Produção e teor de flavonóides da própolis coletada por Apis mellifera em três fitofisionomias no estado do Ceará Autor(es): Silva, Danielle de Abreu Abstract: This work aimed to study the potential of Ceará for the production of propolis evaluated the average production of propolis on three faces of the Caatinga (Caucaia, Maranguape and Limoeiro do Norte), the content of flavonoids, noting differences between propolis produced in three Caatinga vegetation types of faces, and using a new method for extracting wax with NAFTA.The experiment was conducted from August 2008 to July 2009, at PADETEC (Park Technology Development) at the Federal University of Ceará. Ten were placed in beehives propolis collectors randomly selected in each apiary of the three areas. The experiment was established in August 2008 and samples collected in the three months following this. The results showed that the propolis samples obtained from Caucaia Maranguape and Limoeiro do Norte through collections made from ten hives in each of the three apiaries during the months of September, October and November differed with respect to its physical aspects such as color , smell, consistency and quantity. The apiary located in Limoeiro do Norte had a higher production of propolis in all sampling points (p <0.01). Regarding the percentage of wax exists in samples, propolis did not differ with statistical significance (p> 0.05) samples from Caucaia and Maranguape, where this value was significantly different (p<0.01) higher than the samples collected in in Limoeiro do Norte. For the percentage of dry material, Limoeiro do Norte has shown a higher value (p <0.05) than the other two regions. For the flavonoid content, the samples collected in Limoeiro do Norte differed statistically (p <0.01) than the other two regions did not differ (p> 0.05). Tipo: Dissertação

Blend enzimático em dietas para leitões na fase de creche

2026-03-04T13:10:18Z

Título: Blend enzimático em dietas para leitões na fase de creche Autor(es): Patrício, Ivyna Dryelle Fernandes Abstract: With the aim of improving nutrient digestibility, the use of exogenous enzymes can also provide nutritional and/or energy increase in diets for piglets. The objective was to evaluate the addition of an enzyme blend to diets for piglets in two trials regarding the digestibility of feed nutrients, performance, occurrence of diarrhea and intestinal morphometry. In both trials, 4 treatments were used: CON- control feed; RED5- feed with a 5% reduction in energy level, RED2.5%+blend- ration with a 2.5% reduction in energy level and addition of an enzymatic blend; RED5+blend- ration with 5% reduction in energy level and addition of enzyme blend. For the digestibility test, 16 castrated male pigs aged 50 days were housed in metabolic study cages, using the total feces and urine collection method. The addition of an enzymatic blend with a 2.5% energy reduction results in higher digestibility coefficients for dry matter, ether extract, mineral matter, neutral detergent fiber and acid detergent fiber. For the performance test, 64 castrated male piglets aged 21 days were used, distributed among 4 treatments with 8 replications each. From 33 to 42 days of age, it was observed that piglets fed diets with the addition of an enzyme blend showed similar feed conversion compared to those fed the control. Between 43 and 70 days of age, piglets that received diets with the addition of an enzyme blend and reductions of 2.5% in the energy level of the diet showed similar feed conversion to animals that received the control diet. Animals that received food with an enzyme blend showed greater villus height in the duodenum compared to animals fed control food and with a 5% reduction without enzyme supplementation. Animals that received feed containing an enzyme blend showed higher villus height, lower crypt depth and a better villus/crypt ratio compared to those fed with feed with a 5% reduction in energy level without the addition of enzyme blend. The inclusion of an enzymatic blend allows a reduction of up to 2.5% in the energy level of diets without compromising the performance of piglets in the nursery phase and results in better parameters of intestinal morphometry of the duodenum and jejunum of piglets. Tipo: Dissertação