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Desenvolvimento de uma ferramenta digital para estimativa da biomassa de forragem em propriedades rurais do Ceará

2025-10-31T22:45:15Z

Título: Desenvolvimento de uma ferramenta digital para estimativa da biomassa de forragem em propriedades rurais do Ceará Autor(es): Alves, Sávio Levy Sousa Abstract: Livestock plays an essential role in the socioeconomic development of the Brazilian Semi-Arid region, where the raising of cattle, sheep, and goats is widely practiced. However, the activity faces challenges such as the seasonality of forage production, edaphoclimatic limitations, and the scarcity of technologies applied to herd feeding planning. In this context, the use of tools that help producers balance the demand and supply of feed on the property becomes essential. The objective of the present study was to develop an interactive dashboard in Microsoft Excel to carry out tactical feeding planning (medium-term forage budgeting) on rural properties, based on data from dairy hubs in the state of Ceará. The dashboard was built from a database containing biomass information of strategic forage resources for the eight dairy hubs of Ceará, such as buffel grass, forage cactus, and native pasture, in addition to data on herd feed consumption, considering species, category, body weight, and number of animals. The tool allows the user to input the area size (ha) for each type of forage resource and herd characteristics, and as a result, the tool generates an estimate of the total forage biomass, the annual dry matter intake, and the carrying capacity of the property. The results are presented in an intuitive and visual way, making interpretation easier for users. The system validation demonstrated its practical usefulness, allowing the identification of scenarios in which the property’s carrying capacity is below, adequate, or above the recommended level. It is concluded that the dashboard is a promising and accessible tool for forage management, contributing to the rational use of resources, the improvement of the herds’ zootechnical performance, and the sustainability of production systems. Tipo: TCC

Efeito de diferentes teores de matéria seca na conservação de mata-pasto (Senna obtusifolia)

2025-10-31T21:57:04Z

Título: Efeito de diferentes teores de matéria seca na conservação de mata-pasto (Senna obtusifolia) Autor(es): Bezerra, Pâmela Evelyn de Sousa Abstract: The use of legumes such as mata-pasto (Senna obtusifolia) has been encouraged in the semiarid region due to its adaptability and high biomass production. However, its high moisture content and low water-soluble carbohydrates concentration difficult its preservation via ensilage. This study aimed to evaluate the effects of different dry matter (DM) contents on the fermentative, chemical, and microbiological properties of mata-pasto ensilage. The experiment was conducted in a completely randomized design, with five DM contents: 22%, 35%, 45%, 55%, and 65%, with four replicates per treatment. Plastic buckets (10 L) were used as experimental silos and stored for 75 d. Variables related to chemical, fermentative, microbiological characteristics, and aerobic stability were evaluated. Data were subjected to analysis of variance, and a significant effect was considered at P < 0.05. There was a linear effect for DM (P < 0.001) and crude protein (CP; P = 0.001) concentrations, in which their concentrations increased as DM contents increased, with values between 22.1 – 65.3% for DM and 11.5-15.3% for CP. The neutral detergent fiber (NDF) and acid detergent fiber (ADF) were not affected (P > 0.05) by DM. There was a quadratic (P = 0.006) adjustment for pH, with values between 4.89 and 5.46 and lower values observed in silages with 45 and 55% DM. There was a quadratic (P = 0.024) and linear (P < 0.001) adjustment for NH3-N concentration. A peak in NH3-N concentration was observed in silage with 35% DM (7,84% Total-N), reducing at 45% DM (5.21% Total-N), and increasing with 55 and 65% DM. There was a quadratic (P < 0.001) adjustment for dry matter losses (DML), with lower values observed with 45 and 55% DM (4.2 and 3.8%, respectively), and higher DML with 22 and 65% DM (8.9 and 5.7%, respectively). There was a linear adjustment (P = 0.002) for weight losses, where an increase in losses was observed as DM contents increased. A quadratic (P < 0.001) adjustment in silo density was observed as DM concentration at the time of ensiling was higher. Lower density values were obtained in forage ensiled with 65% DM 550 kg/m³). There was no effect (P > 0.05) on the aerobic stability. No changes were observed in microorganism counts, except for the Enterobacteriaceae count, where a reduction (P = 0.028) in the count was observed when DM contents increased. Ensiling with 45% and 55% DM provides better fermentation conditions, with lower DM, more adequate pH, less protein degradation, and greater stability. Tipo: TCC

Eficiência de protocolos hormonais aplicados à reprodução de pequenos ruminantes no Nordeste do Brasil

2025-10-31T16:53:37Z

Título: Eficiência de protocolos hormonais aplicados à reprodução de pequenos ruminantes no Nordeste do Brasil Autor(es): Silva, Mikaelle Brena Maciel da Abstract: Cassava is a crop widely used for animal feed in tropical and subtropical regions. In Brazil,cassava cultivation holds great relevance for family farming, serving as a nutritional, economic,and sustainable resource. The aerial part of cassava is often used in animal feeding due to itsnutritional value. However, this fraction contains cyanogenic glycosides, such as linamarin andlotaustralin, which can release hydrogen cyanide (HCN), a highly toxic and volatile compound.Due to limitations in performing immediate field analyses, it is necessary to adopt storagestrategies capable of preserving HCN concentrations close to those found in the fresh plant. Theaim of this study was to evaluate changes in HCN concentration in the aerial part of bittercassava varieties (Manipeba, Urubu, Ceará, Poti Branca) subjected to cold storage methods:refrigerated (24 h) and frozen (-20 ºC; 30 d). A completely randomized design was used in a 4× 3 factorial arrangement (4 varieties × 2 storages methods (refrigerated and frozen) and freshforage), with four replicates per treatment. Means were compared using Tukey’s test at a 5%significance level. There was an effect of storage (P<0.001), variety (P<0.001), and theinteraction between storage × variety (P=0.021) on HCN concentration. The HCNconcentration in fresh samples showed high values in the Manipeba (77.53 mg/kg DM), Ceará(75.14 mg/kg DM), and Poti Branca (72.38 mg/kg DM) varieties. On the other hand, the lowestconcentration was observed in the Urubu variety (50.55 mg/kg DM). Regarding storage, allvarieties showed reductions in HCN content when samples were refrigerated, compared to freshand frozen samples. The Urubu (36.52 mg/kg) and Poti Branca varieties stood out with thelowest levels, lower than those found in the Manipeba (41.30 mg/kg) and Ceará (42.18 mg/kg)varieties. The HCN concentration in frozen samples of Urubu, Manipeba, and Ceará did notdiffer from fresh samples. Freezing proved to be effective in maintaining HCN concentrationsfor up to 30 d. Tipo: TCC

Efeito do início da fotoestimulação em reprodutoras de codornas de corte de quatro linhagens

2025-10-31T16:14:15Z

Título: Efeito do início da fotoestimulação em reprodutoras de codornas de corte de quatro linhagens Autor(es): Anjos, Roberta Maria Rocha dos Abstract: The experiment aimed to evaluate the effects of the onset of light stimulation in meat quailbreeders of four strains on sexual maturity, productive performance, and egg quality. A totalof 336 female and 112 male meat quails were used for breeding, 84 females and 28 malesfrom each strain. At 35 days of age, the birds were weighed and based on body weight,distributed in a completely randomized design in a 2 x 4 factorial scheme (twophotostimulation programs and four strains), totaling 8 treatments, in which 7 replicates weredistributed. The experimental unit consisted of 6 females and 2 males. The photostimulationprograms consisted of: P1 – photostimulation of the birds at 35 days of age; and P2 –photostimulation of the birds when they reached 50% laying. In both programs, the lightstimulus consisted of offering the birds 14 hours of light per day (natural + artificial) and,subsequently, weekly additions of 30 minutes of artificial light were made until reaching 15hours and 30 minutes of light (natural + artificial), maintaining this amount of daily light untilthe end of the experimental period. From 7 to 37 weeks of age, the following productiveperformance were evaluated: egg production (%/bird/day), feed intake (g/bird/day), eggweight (g), egg mass (g/bird/day), and feed conversion (g/g); egg quality: percentage ofalbumen, yolk, and white, Haugh units, and shell thickness. Statistical analysis of the data wasperformed using analysis of variance and comparison of means using Tukey's test (5%). Therewas no significant interaction between the factors studied and the variables evaluated duringthe experiment. Photostimulation at 35 days of age significantly reduced the age of the birdsat first egg production and at 50% laying, with lineage 1 being the earliest at these ages.During the laying phase, it was observed that feed intake, laying percentage, egg weight, feedconversion, and total number of eggs produced were not significantly influenced by theinitiation of photostimulation of the quails. However, significant differences were observedbetween the lines in terms of egg-laying percentage, total eggs produced, and feed conversion.Birds from lines 1 and 2 had higher egg production and better feed conversion than birds fromlines 3 and 4. Egg quality did not vary significantly according to the age of photostimulationor between strains. It is concluded that photostimulation of breeding quails can be performedat 35 days of age, resulting in early laying without compromising egg production or the sizeand quality of hatching eggs. The strains evaluated responded similarly to light stimulation,with strain 1 being the earliest, and together with strain 2, they were more productive thanstrains 3 and 4. Tipo: TCC