Suchergebnisse

Este artigo analisa as respostas governamentais à pandemia de Covid-19 no Brasil no que se refere às medidas de distanciamento social durante os primeiros meses de sua eclosão. Desde o início da pandemia a resposta à crise tem sido liderada por prefeitos e governadores. A maior parte das análises centrou-se nas medidas adotadas por governos estaduais e capitais, deixando em segundo plano as cidades médias. Neste artigo analisamos as medidas legais voltadas para fomentar o distanciamento social em uma amostra de 49 municípios com mais de 200 mil habitantes. Utilizamos o índice elaborado por Moraes (2020) para classificar as medidas quanto ao seu grau de rigor. A análise revelou convergências e divergências entre as medidas adotadas no período de março a junho de 2020. Corrobora que os prefeitos das cidades médias fizeram uso de suas prerrogativas, mas suas decisões foram constragidas pelas normas estaduais e pelo tipo de relacionamento estabelecido entre estados e municípios.
Palavras-chave: Covid-19, pandemia, distanciamento social, municípios, governos locais

This section analyzes government responses to the COVID-19 pandemic in five Latin American countries: Argentina, Brazil, Peru, Mexico, and Uruguay. The articles address the pandemic's evolution and emergency policy construction in these countries, emphasizing the dynamics of cooperation and conflict between presidents, congresses, bureaucracies, and subnational governments. The articles point to factors that contributed to varying degrees of governance of the crisis, from presidential leadership to government action's structural limits. In particular, studies allow for a more exhaustive assessment of presidents' responses, ranging from presidential inaction, populist rhetoric, and politically costly decision-making. ; Esta sección analiza las respuestas gubernamentales a la pandemia de COVID-19 en cinco países de América Latina: Argentina, Brasil, Perú, México y Uruguay. Los artículos abordan la evolución de la pandemia y la construcción de políticas de emergencia en estos países, con énfasis en las dinámicas de cooperación y conflicto entre presidentes, congresos, burocracias y gobiernos subnacionales. En conjunto, los artículos apuntan a factores que contribuyeron a diversos grados de gobernanza de la crisis, desde el liderazgo presidencial hasta los límites estructurales de la acción gubernamental. En particular, los estudios permiten una evaluación más exhaustiva de las respuestas de los presidentes, que varían entre la inacción presidencial, la retórica populista y la toma de decisiones políticamente costosa.

To strategically define the best stocking rate management strategy for ryegrass, it is important to know the growth process of forage plants in detail. The study was conducted to analyze the leaf biomass flows and the defoliation intensity and frequency of Italian ryegrass (Lolium multiflorum Lam) grazed by heifers fed exclusively on pasture or on pasture and supplemented with corn or white oat grain. The experimental design was completely randomized following a repeated measures arrangement with three feeding systems and three area replications. Biomass flows (kg DM leaf blades ha1 day1) for leaf growth (40.6), leaf senescence (40.7), and leaf intake (29.7) were similar in the different feeding systems. Leaf blade intake adjusted to body weight was lower in supplemented heifers regardless of grain type. Actual and potential utilization efficiencies and ryegrass biomass net balance were not affected by feeding system. The leaf intake flow was 1.4 times lower than the growth flow, resulting in an actual utilization efficiency less than one (0.7), whereas the senescence flow was higher than the growth flow, resulting in a negative potential utilization efficiency (0.2). Leaf defoliation intensity was similar (54.4%) across feeding systems and defoliation frequency was higher in supplemented heifers. The 29.2% increase in stocking rate of heifers fed corn or oat grain as supplement did not affect the dynamics of ryegrass biomass flows, but reduced leaf blade intake adjusted to heifer body weight leading to alterations in the defoliation frequency of ryegrass pasture.

We evaluated the grazing behavior of heifers, at two phenological stages (vegetative and reproductive) of ryegrass (Lolium multiflorum Lam.), in four times of the day (early morning, morning, evening, and night), with heifers either exclusively grazing or with oat, or corn grain, supplementation. The experimental design was completely randomized, in sub-subdivided plot arrangement, in which the main plots were the feeding systems, the sub-plots were the phenological stages and the sub-sub-plots were the times of day. We assessed ingestion behavior along 24 hours through visual observation, on four evaluation dates, two during the vegetative stage and two during the reproductive stage, studying time spent on grazing, rumination, or other activities, as well as number and duration of, and interval between meals. Supplemented heifers remained less time at a feeding station, performed fewer bites daily and, during the reproductive stage of the ryegrass, spent more time in other activities. Grazing time of supplemented heifers was shorter in the morning and at night, and the duration of their meals was shorter at night. A change occurred in the pattern of time use when heifers received supplement, and when the structural and qualitative characteristics of the pasture changed during the vegetative and reproductive phenological stages of ryegrass.

Our work was carried out to evaluate forage intake, feeding behavior and displacement patterns of beef heifers fed exclusively on pasture or receiving oat grain, either daily ("frequent") or from Monday to Friday ("infrequent"), in two phenological stages of Alexandergrass (Urochloa plantaginea Link.): "Vegetative" and "Reproductive". The grazing method was continuous, with a variable number of animals. The experimental design was completely randomized with measures repeated in time with three feeding frequencies and two phenological stages. Forage intake was estimated using the chromic oxide technique as an indicator of fecal output. Heifers on exclusive Alexandergrass pasture and frequently supplemented had higher forage intake of dry matter (DM, 2.91 kg DM 100 kg BW-1) than those that were infrequently supplemented (2.00 kg DM 100 kg BW-1). Forage intake was greater in the "Vegetative" stage. The use of feeding stations is modified in response to supplementation frequency and phenological stages of Alexandergrass. Bite mass was higher for daily supplemented heifers, and these animals spent less time grazing. Also, bite mass was the item that best explained DM total ingestion. Bite mass and grazing time were similar throughout the phenological stages, whereas bite rate decreased in the reproductive stage. Feeding behavior and forage intake responses of beef heifers were influenced by supplementation frequency and phenological stages of Alexandergrass.