Publicações - ciências agrárias
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MORAES, RENATA FRANCIELI;
MARTIN, DANIELA MARIA;
PRATES, ARTHUR PONTES;
Carolina Bremm;
Paulo César de Faccio Carvalho;
ALVES, LUCAS AQUINO;
OLIVEIRA, LEANDRO BITTENCOURT DE;
Aníbal de Moraes
Palavra-chave:
Gamma;
heterogeneity;
selective grazing;
continuous stocking;
Weibull
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; agronomia
resumo ...
Sward height is a practical indicator for defining management targets that reflect pasture structure. The complexity of integrated systems, including the coexistence of trees, crops, and livestock, can modify animal grazing distribution and microhabitat conditions, leading to different degrees of sward heterogeneity and botanical composition. This study investigated sward-height distribution and species composition in four systems: livestock (L), livestock–forestry (LF), crop–livestock (CL), and crop–livestock–forestry (CLF). Data were collected over two years in pastures of black oat (Avena strigosa Schreb.), Aries grass (Megathyrsus maximus cv. Aries), Italian ryegrass (Lolium multiflorum Lam.), and other tropical grasses during summer, transition, and winter. Sward heights were classified into three categories (low, optimal, high) according to seasonal thresholds (winter: <18.0; 18–29.9; >30 cm; summer: <15.0; 15–24.9; >25 cm) and fitted to four probability distributions (normal, log-normal, Gamma, Weibull). Management based on target-height maintained 46% of observations within the optimal class, a satisfactory proportion for continuous stocking systems where structural heterogeneity is inherent. The CL system presented greater species diversity due to a higher frequency of Italian ryegrass and other grasses. Across systems and seasons, the Gamma distribution provided the best fit for sward-height frequencies. These findings offer a practical statistical tool for evaluating grazing management efficiency.
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Fernanda Ripel Salgado;
Amauri Felipe Evangelista;
Juliana Sesana;
Rodrigo de Almeida Teixeira;
Laila Talarico Dias Teixeira
Palavra-chave:
critérios de seleção;
defeitos morfológicos;
Gado de Corte;
Parâmetros Genéticos
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Zootecnia; Genética e Melhoramento dos Animais Domésticos
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Morphological defects in beef cattle can compromise animal welfare, functionality and reproductive efficiency, generating economic losses and reducing longevity. Understanding their genetic basis is essential to support selection decisions and prevent the dissemination of defects in breeding programs. This study aimed to estimate the genetic parameters for defects of feet and legs (FL), mouth (MO), chamfer (CH), racial characterization (RC), depigmentation (DP), umbilical hernia (UH), testicular hypoplasia (TH) and navel (NV), evaluated as binary traits at 18 months of age, in Nellore cattle. The data was provided by the CRV Lagoa - PAINT® beef cattle genetic breeding program, which belonged to the company until 2020. The components of (co)variance and breeding values were estimated by Bayesian inference using Animal Models. The genetic correlation between FL and yearling weight (YW) was obtained through a two-trait linear-threshold model. Posterior heritabilities for FL, MO, CH, RC, DP, UH, TH, NV and YW were 0.16 ± 0.03; 0.23 ± 0.04; 0.19 ± 0.03; 0.39 ± 0.04; 0.69 ± 0.04; 0.38 ± 0.12; 0.19 ± 0.04; 0.53 ± 0.04 and 0.45 ± 0.01, respectively. When lineage effect was considered fixed, all traits showed high heritability (> 0.40). The genetic correlation between FL and YW was negative and of low magnitude (-0.06 ± 0.05 without lineage; -0.01 ± 0.09 with lineage). The estimated genetic trends for FL, MO, CH, RC, DP, TH and NV declined over the years, indicating a gradual reduction of their incidence due to selection, while UH presented unstable pattern. Overall, the results indicated that including disqualifying traits in breeding programs can lead to reduced occurrence of morphological defects in Nellore herds.
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FERREIRA, MAYARA MONTEIRO;
Alessandro Camargo Angelo;
CESAR FURLANETO SAMPAIO, ANDRÉ;
Jean Freitag Kramer;
BORGO, MARILIA;
COSMO, NELSON LUIZ;
BLUM, CHRISTOPHER THOMAS;
SCHNEIDER, CHAIANE RODRIGUES;
MASTELLA, ALEXANDRE DAL FORNO;
Sarah Domingues dos Santos
Palavra-chave:
Restauração ecológica;
Ecologia da restauração;
Floresta ombrófila densa;
planície litorànea;
Inga edulis;
Especies arboreas nativas
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Fisiologia Florestal;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Fisiologia Florestal;
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Conservação da Natureza; Recuperação de Areas Degradadas
resumo ...
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ALBA DA SILVA, FRANCIELE;
EMPL, FLORIAN;
Afonso Figueiredo Filho;
LOPES, EDUARDO SILVA;
PELZ, STEFAN;
RICKLI, MILAYNE;
HENKEL, KARINA;
DA SILVA OLIVEIRA, RONIER FELIPE;
NATALLI, LUIZ HENRIQUE;
NAUIACK, CARLOS HENRIQUE BOSCARDIN
Palavra-chave:
Invasive species;
Forest management;
Small properties;
Hovenia dulcis;
Native forest;
Araucaria Forest
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Manejo Florestal; Dendrometria e Inventário Florestal
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BORDIGNON, FRANCESCO;
COSTA, LUIZA COUTINHO;
DE SOUZA VALENTE, CECÍLIA;
MAUERWERK, MARLISE;
CAZAROLLI, LUISA HELENA;
DO NASCIMENTO FERREIRA, CAIO HENRIQUE;
BOSCOLO, WILSON ROGÉRIO;
Eduardo Luis Cupertino Ballester
Palavra-chave:
nutrition;
protein
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Pesqueiros e Engenharia de Pesca; Aqüicultura; Piscicultura
resumo ...
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Matheus Fonseca Durães;
Matheus Menezes dos Santos
Palavra-chave:
RUSLE;
sediment transport;
empirical model;
Hydrology
Áreas do conhecimento:
Ciências Exatas e da Terra; Geociências; Geografia Física; Hidrogeografia;
Engenharias; Engenharia Civil; Engenharia Hidráulica; Hidrologia;
CIENCIAS_AGRARIAS; Engenharia Agrícola; Engenharia de Água e Solo; Conservação de Solo e Água
resumo ...
(en)
Land use can be considered one of the main variables impacting watershed erosion. During the past decades, extensive native areas have been reclaimed along the central-western region of Espirito Santo State in Brazil, while agricultural pressures on landcover-sedimentation are in some degree unknown. This study aims to analyze the impacts of landcover policy on sediment yield in the Guandu river basin (GRB), Brazil after the introduction of the Native Vegetation Protection Law (NVPL). For this purpose, it was implemented a multidisciplinary approach that combines sediment records and mathematical modeling to estimate soil erosion for the years 2012 and 2021. The effect of land cover modifications was studied using suspended sediment records and satellite image data for the period. The dynamics of sediment production and transport in the main channel in the two periods studied had changed, indicating that NVPL showed considerable efficiency after its implementation as a public policy. Sediment concentration observed from the monitoring gauges ranged from 0.26 t⋅ha-1⋅year-1 to 1.68 t⋅ha-1⋅year-1 in 2012, and 0.40 t⋅ha-1⋅year-1 to 0.76 t⋅ha-1⋅year-1 for the year 2021. In terms of sediment delivery ratio (SDR), the year 2012 presented the mean annual value of 8.5%, while 2021 showed a mean annual value of 6.2%. These results have provided important information for measures associated with the management, conservation and planning of land use in the basin, which of great importance when predicting the development of various scenarios for the GRB and the application of conservation policy.
(pt)
O uso da terra pode ser considerado uma das principais variáveis que afetam a erosão das bacias hidrográficas. Durante as últimas décadas, extensas áreas nativas foram recuperadas ao longo da região centro-oeste do Estado do Espírito Santo, no Brasil, enquanto as pressões agrícolas sobre a cobertura da terra e a sedimentação são, até certo ponto, desconhecidas. Este estudo tem como objetivo analisar os impactos da política de cobertura da terra sobre a produção de sedimentos na bacia do rio Guandu (GRB), Brasil, após a introdução da Lei de Proteção da Vegetação Nativa (LPVN). Para esse fim, foi implementada uma abordagem multidisciplinar que combina registros de sedimentos e modelagem matemática para estimar a erosão do solo para os anos de 2012 e 2021. O efeito das modificações na cobertura da terra foi estudado usando registros de sedimentos suspensos e dados de imagens de satélite para o período. A dinâmica da produção e do transporte de sedimentos no canal principal nos dois períodos estudados foi alterada, indicando que o NVPL apresentou eficiência considerável após sua implementação como política pública. A concentração de sedimentos observada nos medidores de monitoramento variou de 0,26 t⋅ha-1⋅ano-1 a 1,68 t⋅ha-1⋅ano-1 em 2012, e de 0,40 t⋅ha-1⋅ano-1 a 0,76 t⋅ha-1⋅ano-1 para o ano de 2021. Em termos de taxa de entrega de sedimentos (SDR), o ano de 2012 apresentou o valor médio anual de 8,5%, enquanto 2021 mostrou um valor médio anual de 6,2%. Esses resultados forneceram informações importantes para medidas associadas ao gerenciamento, à conservação e ao planejamento do uso da terra na bacia
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FRANÇA, TATIANE OTTO DE;
MARTINS, BÁRBARA;
OLIVEIRA, BRUNO GONÇALVES DE;
Luis Antonio Biasi;
BOTELHO, RENATO VASCONCELOS;
JORDÃO, ANTÓNIO M.
Palavra-chave:
viticultura;
vitis vinifera;
compostos fenólicos
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Agronomia; Fitotecnia; Manejo e Tratos Culturais
resumo ...
The use of new grape cultivars is essential for the continued development of Brazilian viticulture. Thus, this study aimed to determine the general physicochemical parameters, global phenolic composition, and antioxidant capacity of grape musts from the Portuguese red variety ‘Touriga Nacional’ during ripening in two Brazilian vineyards (states of Rio Grande do Sul and Santa Catarina). The results were compared with data obtained from the same variety cultivated in a vineyard located in northern Portugal, which is the region of origin of this variety. This research was conducted over three consecutive vintages (2022–2024). Overall, the results indicated that soil and climate conditions at each location were associated with differences in the composition of ‘Touriga Nacional’ grape musts. Grapes from both Brazilian vineyards showed significantly higher berry weight, must volume, and yield compared with grapes collected from the Portuguese vineyard. On the other hand, grapes collected from the vineyard located in the state of Santa Catarina exhibited the highest values of total titratable acidity, malic acid, total phenols, flavonoids, total anthocyanins, and chromatic characteristics. Nevertheless, grapes collected from the Portuguese vineyard showed higher values of total tannins. The results suggest that the ‘Touriga Nacional’ variety shows better adaptation to the conditions of the Santa Catarina vineyard than to those of the Rio Grande do Sul vineyard. These findings help winegrowers, particularly in southern Brazil, to have more options for introducing different grape varieties, thereby contributing to the production of wines with distinctive characteristics, while consumers will have access to a greater diversity of wines available on the market.
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PALUDETO, JOÃO GABRIEL ZANON;
MARCATTI, GUSTAVO EDUARDO;
ESTOPA, REGIANE ABJAUD353;T;283;, JAROSLAV;
João Carlos Bespalhok Filho;
RESENDE, RAFAEL TASSINARI
Palavra-chave:
Interação Genótipo Ambiente;
Melhoramento de plantas
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Recursos Florestais e Engenharia Florestal; Silvicultura; Genética e Melhoramento Florestal
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Fernando Andrade Souza;
Geraldo Francisco dos Santos Júnior;
WALLYSON RAFAEL MACHADO SANTOS;
Mayara Silvestre;
Natalia Santana Siqueira de Lara;
Rafael Augusto Satrapa;
Luciane Maria Laskoski;
KOZICKI, L.E.;
Pedro Henrique Lomba de Lima
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Medicina Veterinária; Reprodução Animal; Biotecnologia Aplicada a Reprodução Animal
resumo ...
(en)
The present study aimed to evaluate the pregnancy rate following fixed-time artificial insemination (FTAI) in Nelore cattle supplemented with either long-acting progesterone (Experiment 1) or an injectable nutritional complex (Experiment 2). In Experiment 1, multiparous cows underwent estrus synchronization and were inseminated on day D10 (D0 = first day of synchronization). On D15, animals were assigned to a control group (n = 166), which received an intramuscular injection of 0.5 mL of 0.9% NaCl solution, or to a treated group (n = 147), which received 0.5 mL of long-acting progesterone (150 mg). In Experiment 2, heifers were divided into a control group (n = 108), which received no treatment, and a treated group (n = 99), which received an intramuscular injection of a nutritional supplement on D0 of synchronization. After 7 days of FTAI, all cows and heifers were maintained with bulls for natural mating (20 females per bull) for the following 45 days. Pregnancy diagnosis was performed 70 days after FTAI. The pregnancy rate was higher in the treated groups for both experiments (53.1% vs. 42.8% in Experiment 1, and 53.7% vs. 38.8% in Experiment 2), although differences were not statistically significant (p > 0.05). In animals that did not conceive, ovarian cyclicity was not suppressed, indicating that the use of long-acting progesterone or nutritional supplementation did not interfere with the return to estrus. In conclusion, supplementation with long-acting progesterone or an injectable nutritional complex tended to improve pregnancy rates in Nelore cattle subjected to FTAI, without residual inhibitory effects on subsequent ovarian activity.
(pt)
The present study aimed to evaluate the pregnancy rate following fixed-time artificial insemination (FTAI) in Nelore cattle supplemented with either long-acting progesterone (Experiment 1) or an injectable nutritional complex (Experiment 2). In Experiment 1, multiparous cows underwent estrus synchronization and were inseminated on day D10 (D0 = first day of synchronization). On D15, animals were assigned to a control group (n = 166), which received an intramuscular injection of 0.5 mL of 0.9% NaCl solution, or to a treated group (n = 147), which received 0.5 mL of long-acting progesterone (150 mg). In Experiment 2, heifers were divided into a control group (n = 108), which received no treatment, and a treated group (n = 99), which received an intramuscular injection of a nutritional supplement on D0 of synchronization. After 7 days of FTAI, all cows and heifers were maintained with bulls for natural mating (20 females per bull) for the following 45 days. Pregnancy diagnosis was performed 70 days after FTAI. The pregnancy rate was higher in the treated groups for both experiments (53.1% vs. 42.8% in Experiment 1, and 53.7% vs. 38.8% in Experiment 2), although differences were not statistically significant (p > 0.05). In animals that did not conceive, ovarian cyclicity was not suppressed, indicating that the use of long-acting progesterone or nutritional supplementation did not interfere with the return to estrus. In conclusion, supplementation with long-acting progesterone or an injectable nutritional complex tended to improve pregnancy rates in Nelore cattle subjected to FTAI, without residual inhibitory effects on subsequent ovarian activity.
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Shelley W. Cochran;
Lynsey Wagner;
Christine Molter;
Melissa Hanson;
Laura Rice;
SHAW, GILLIAN C.;
Fabiano Montiani Ferreira;
MOORE, BRET A.
VETERINARY OPHTHALMOLOGY,
v. 26,
n. 26,
p. 1-9,
2026
Palavra-chave:
retina;
retinal degeneration;
exotic animals;
wild animal ophthalmology;
Tapir
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Medicina Veterinária; Clínica e Cirurgia Animal; Oftalmologia Veterinária;
CIENCIAS_AGRARIAS; Medicina Veterinária; Clínica e Cirurgia Animal; Medicina de Animais Selvagens
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