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Análise bibliométrica da produção científica sobre palma forrageira na base de dados Web of Science
(2021-07-09) Barros, Eveline Maria de; Cunha, Márcio Vieira da; http://lattes.cnpq.br/8936474723708253; http://lattes.cnpq.br/9746268668354240
Bibliometrics is an area of study in librarianship and science and technology dedicated to collecting, analyzing and evaluating the quantitative aspects related to the production and dissemination of information published in the media. Indicators from bibliometric studies can be useful for the planning and execution of public policies, in addition to being a means of finding out which are the most recurrent studies in a given area of knowledge and as a source of new themes for future projects. The objective of this work is to study the scientific production on forage cactus in the Web of Science (WoS) database. The forage cactus was chosen as the theme because of its importance for arid and semi-arid regions, emphasizing its relevance in the Brazilian Northeast. The data were obtained using the terms "Opuntia" and "forage" as search criteria, where data from 285 articles in the period 1945 to 2020 were analyzed. Aspects such as the amount of annual publication, authors who produce the most on the topic, were considered. more relevant funding agencies, more productive educational and research institutions, more recurrent publishing sources, countries that are more productive, most used languages and keywords. Through bibliometric analysis on scientific production in the Web of Science database, it was possible to identify productivity trends on forage cactus. The publication range found was from 1991 to 2020, with significant growth from 2006 and peaking in 2020. Most research institutions, funding and journals were Brazilian, US or Mexican, which indicates that they are the countries that most do and invest in research with forage cactus. Most of the most productive authors are linked to a Brazilian teaching and research institution, corroborating the production of research institutions and countries as a whole. The most recurrent themes are directly linked to previously determined search terms and the themes of the most current articles are related to the environment. Through these results, the researcher will be able to have a basis to make decisions regarding the best options according to their criteria, whether they are related to publication sources, research institutions, language to be used, among others.
Análise bibliométrica da produção científica sobre sistemas silvipastoris na base de dados Web of Science
(2021-07-09) Carvalho, Robson Oliveira de; Cunha, Márcio Vieira da; http://lattes.cnpq.br/8936474723708253
Bibliometric analyzes arise in response to the large amount of information generated by scientific production activities in a specific area of knowledge and the need to store, categorize, quantify and qualify such a large volume of information. Silvopastoral systems are integrated systems that seek to benefit from the relationship between animals, pasture and the use of tree species within the agricultural production system. With numerous benefits, this system alleviates one of the main problems of pastures, the degradation caused by several factors. Over the years, there has been an increase in the interest of the academic and scientific community regarding silvopastoral systems, generating more and more research and articles on the subject and promoting the technological development of the practice. Therefore, the objective of this work was to analyze the scientific production on silvopastoral systems in the last 30 years through bibliometric indicators in the Web of Science database. It was observed that Brazil (2nd place), together with the USA (1st place), stands out in the publication on the subject. Most of the work was carried out by the Brazilian Agricultural Research Corporation (EMBRAPA) and financed by the National Council for Scientific and Technological Development (CNPq) and by the Coordination for the Improvement of Higher Education Personnel (CAPES). The authors who produced the most scientific articles on the subject are affiliated with the University of Santiago de Compostela (USC) in Spain, namely Rodrigues, A. R. (27 articles) and Losada, M. R. M. (26 articles). Regarding journals, more than 28% of the articles were published in Agroforestry Systems. The main keywords used in the articles were agroforestry, silvopasture and shading. The most present species and genera within the evaluated works were Brachiaria brizantha, Leucaena, Eucalyptus and Pinus radiata, and the animals were cattle and sheep. Bibliometric studies play an important socioeconomic role in determining the trends and directions of the desired area of knowledge within the scope of scientific research, benefiting decision-making by governments and research/financing agencies. When applied to the topic of Silvipastoral Systems, these studies allow determining a timeline, observing the growing interest of researchers in the topic, especially between 2017 and 2020.
Desenvolvimento de modelos matemáticos para estimativa da área foliar de leguminosas forrageiras
(2020-10-27) Guimarães, Larissa Morane Pinto; Cunha, Márcio Vieira da; http://lattes.cnpq.br/8936474723708253; http://lattes.cnpq.br/4555295690063951
The leaf area is an important characteristic of forage plants. Through it, it is possible to monitor the development of plants and calculate the leaf area index, which has been used as a parameter for the management of forage plants. The objective of this work was to evaluate mathematical models to estimate leaf area of the styling leguminous seabrana (Stylosanthes seabrana BL Maass & 't Mannetje), Leucena (Leucaena leucocephala (Lam.) De Wit.) And Gliricidia (Gliricidia sepium (Jacq.) Kunth ex Walp.) Depending on the length, width and product of the leaf length and width. 200 expanded leaves were collected per legume species. For measurements of leaf dimensions (length and width), a measuring tape graduated in centimeters was used and for the leaf area, the Easy Leaf Area Free application was used for smartphones. Descriptive statistical analysis of the studied variables (leaf area, length and width) was performed and three linear models were tested for each species and for the set of leaves of all species, totaling 12 models, using the leaf area as a dependent variable. The performance of the models was evaluated by RMSE (root mean squared error) and R2. The model with the product of leaf length and width as an independent variable showed the best fit and estimate of the leaf area. Thus, it was possible to estimate the leaf area of forage legumes with greater precision through the product of leaf length and width, in all legumes, notably in Gliricídia. In addition, the best model was obtained by integrating all leaves of the species. The Easy Leaf Area Free smartphone application proved to be efficient and easy to use to estimate the leaf area of the studied legumes.
Massa de forragem e valor nutritivo de capim-braquiária [Urochloa decumbens (Stapf) R. D. Webster] sob pastejo em monocultivo, com ou sem adubação, e em sistema silvipastoril
(2024-10-01) Cavalcanti, Isaque da Silva; Cunha, Márcio Vieira da; Silva, Rita de Cássia Manso; http://lattes.cnpq.br/0329511011280265; http://lattes.cnpq.br/8936474723708253; http://lattes.cnpq.br/5434373242065945
Silvopastoral systems provide significant ecological, economic, and social benefits. These systems can mitigate the negative effects of monoculture on soil by diversifying production through the integration of forestry practices, promoting animal welfare through shading, and enhancing nutrient cycling, which can improve soil fertility, particularly when involving tree legumes. Signal grass (Urochloa decumbens Stapf.) is the most widespread forage species in Brazilian pastures. The hypothesis of this study is that the silvopastoral system with the tree legume sabiá (Mimosa caesalpiniifolia Benth.) improves the nutritional value of Signal grass compared to monoculture, especially without fertilization, without significantly impacting herbage mass. The objective of this thesis was to evaluate herabage mass and the nutritional value of signal grass in monoculture, with or without fertilization (50 kg of N, P, and K ha⁻¹ year⁻¹), and in a silvopastoral system with the sabiá legume, during the rainy season (March to August 2023) and dry season (December 2022 to February 2023 and September to November 2023), in the semi-arid region of Pernambuco, Brazil. The grazing method used was continuous stocking with variable stocking rates, utilizing non-castrated male crossbred Nelore cattle with an average initial live weight of 170 kg. The experimental design was randomized block with three repetitions. The silvopastoral system showed a lower dry mass of green signal grass forage (2045 kg ha⁻¹) compared to the fertilized monoculture (2703 kg ha⁻¹), while it did not differ from the unfertilized monoculture (2327 kg ha⁻¹). Herbage mass was greater during the rainy season (2987 kg ha⁻¹). The silvopastoral system had a lower amount of senescent material compared to the unfertilized monoculture. Additionally, it exhibited a higher incidence of invasive plants compared to monocultures. There were no significant effects of treatments and seasons on the levels of dry matter, mineral matter, organic matter, neutral detergent fiber corrected for ash and protein, and hemicellulose of signal grass (296 g kg⁻¹ DM, 84 g kg⁻¹ DM, 916 g kg⁻¹ DM, 725 g kg⁻¹ DM, and 39 g kg⁻¹ DM, respectively). The crude protein content of the grass in the silvopastoral system was higher (51 g kg⁻¹ DM) than that of the unfertilized monoculture (41 g kg⁻¹ DM) and did not differ from that of the fertilized monoculture (44 g kg⁻¹ DM). However, it was not affected by the time of year. The levels of neutral detergent fiber and acid detergent fiber in signal grass were higher during the rainy season, averaging 794 and 402 g kg⁻¹ DM, respectively. The in vitro digestibility of dry matter of the forage was higher in the dry season (499.8 g kg⁻¹ DM). The silvopastoral system with the sabiá legume, while promoting lower signal grass herbage mass compared to fertilized monoculture, offers nutritional and structural advantages, such as increased crude protein content and reduced dead material, which can enhance animal diet and consumption.
Principais plantas tóxicas em pastagens do Nordeste, com ênfase em Pernambuco
(2019) Ferreira, Claudia Maciel; Cunha, Márcio Vieira da; http://lattes.cnpq.br/8936474723708253; http://lattes.cnpq.br/4541443783709386
The number of plants described as toxic grows more and more. There are currently approximately 130 plant species considered toxic. The presence of toxic plants in production systems can generate losses and know which plants are, morphological characteristics, toxic principles, toxic dose, toxicity level, animals that are affected, as well as preventive actions, are of utmost importance for livestock. To be considered toxic the plant needs to be tested through laboratory experiments and with the animal species in question, as there are many differences in effects caused by plants between animal species. And plants considered toxic, experimentally need to cause some kind of pathology when ingested by animals and occur in natural conditions, so they are considered toxic plants of livestock interest. Objective of this work was to perform a literature review on the main toxic plants of the Northeast, with those occurring in the state in Pernambuco. Toxic plants affect animals in a number of ways, such as gastrointestinal disturbances, central nervous system problems, reproductive system problems, and photosensitization and sudden death. Toxic plants that occur on pastures can cause many losses, including animal death. Knowing these plants is strategic for proper pasture management. The best way to control the occurrence of these plants is to properly manage pastures, with stocking adjustment based on forage mass and definition of grazing frequency based on pasture growth.
Relatório de Atividades do Estágio Supervisionado Obrigatório: Fazenda Tapuio Agropecuária
(2025-06-25) Silva, Micaele Pereira da; Cunha, Márcio Vieira da; http://lattes.cnpq.br/8936474723708253; http://lattes.cnpq.br/9113165570280422
O leite é um dos alimentos mais importantes para a alimentação humana, sendo produzido basicamente em todo o mundo. O Brasil abriga o maior rebanho de bubalinos do mundo ocidental, com mais de 1,5 milhão de cabeças. Essa espécie se destaca como um recurso de alto potencial para a pecuária moderna, notadamente por sua capacidade de converter forragens de baixa qualidade e resíduos de culturas em produtos de elevado valor, como leite e carne. O presente relatório de estágio apresenta atividades realizadas no setor de bubalinocultura da Fazenda Tapuio Agropecuária. O estágio foi realizado entre 14 de abril e 10 de junho de 2025 e envolveu atividades como manejo de bezerros, aleitamento com amas de leite, manejo reprodutivo de búfalas leiteiras com IATF, diagnóstico de gestação, ordenha em sistema carrossel, dentre outras. O estágio supervisionado obrigatório reveste-se de fundamental importância na formação dos profissionais da área de Zootecnia, ao oferecer experiências práticas e contato direto com os animais.
Relatório de Estágio Supervisionado Obrigatório
(2021-12-10) Barros, Eveline Maria de; Cunha, Márcio Vieira da; http://lattes.cnpq.br/8936474723708253; http://lattes.cnpq.br/9746268668354240