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Search Results: 1 - 10 of 399 matches for " Macari Stefani "
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Avalia o da mistura de cultivares de aveia preta (Avena strigosa Schreb) com azevém (Lolium multiflorum Lam.) sob pastejo
Macari Stefani,Rocha Marta Gomes da,Restle Jo?o,Pilau Alcides
Ciência Rural , 2006,
Abstract: O experimento foi conduzido com objetivo de avaliar a produ o de novilhas de corte em duas cultivares de aveia preta (Avena strigosa Schreb): "Comum" e "IAPAR 61" em mistura com azevém (Lolium multiflorum Lam.). Foram avaliadas a massa de forragem (MF), oferta de forragem (OF), taxa de acúmulo diário de matéria seca (TA), carga animal (CA), ganho médio diário (GMD), ganho de peso vivo por hectare (GPA), proteína bruta (PB) e digestibilidade in vitro da matéria organica (DIVMO). As cultivares avaliadas n o diferiram (P>0,05) para TA, CA, GMD, GPA e PB. A DIVMO de IAPAR 61 manteve valores mais elevados durante um período mais prolongado da esta o de crescimento da pastagem. A cultivar de aveia preta IAPAR 61 pode ser indicada para utiliza o sob pastejo no Estado do Rio Grande do Sul.
Avalia??o da mistura de cultivares de aveia preta (Avena strigosa Schreb) com azevém (Lolium multiflorum Lam.) sob pastejo
Macari, Stefani;Rocha, Marta Gomes da;Restle, Jo?o;Pilau, Alcides;Freitas, Fabiana Kellermann de;Neves, Fabio Pereira;
Ciência Rural , 2006, DOI: 10.1590/S0103-84782006000300028
Abstract: this work aimed at evaluating the production of beef heifers in two cultivars of black oats (avena strigosa schreb): 'comum' and 'iapar 61' mixed with italian ryegrass (lolium multiflorum lam). the variables evaluated were: forage mass (fm), forage on offer (fo), daily accumulation of dry matter (fad), stocking rate (sr), average daily gain (adg), live weight gain (lwg), crude protein (cp) and in vitro organic matter digestibility (ivomd). no effects (p>0.05) were detected on fad, sr, dap, lwg and cp for the two cultivars. the ivomd of 'iapar 61' presented highest values during a more extended period in growing season of pasture. the 'iapar 61' cultivar can be indicated for use under grazing in rio grande do sul state.
Comportamento ingestivo diurno de novilhas de corte recebendo níveis de suplemento
Macari, Stefani;Rocha, Marta Gomes da;P?tter, Luciana;Roman, Juliano;Bremm, Carolina;Costa, Vagner Guasso da;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000600038
Abstract: the trial was conducted aiming to evaluate pasture botanical composition and diurnal ingestive behavior of beef heifers receiving different supplement levels. the animals were kept in black oats (avena strigosa schreb.) and italian ryegrass (lolium multiflorum lam.) pasture, receiving 0; 0.3; 0.6 and 0.9% of live weight (lw) of supplement. the supplement utilized was a commercial ration. in four dates were registrated diurnal activities of grazing, ruminating, idle, number of visits and trough permanence time and bite rate. increasing supplement levels reduced grazing time and increased idle time (p<0.05). bite rate and bite weight were affected by the supplement and pasture cycle (p<0.05). ruminating time was not affected by supplement levels (p>0.05). botanical and structural composition of pasture were influenced by supplement levels and related with herbage production cycle (p>0.05).
Recria de borregas sob diferentes métodos de pastoreio em azevém anual em sucess?o a lavoura
Macari, Stefani;Carvalho, Paulo César de Faccio;Oliveira, Lisandre de;Devincenzi, Thais;Albuquerque, Caetano;Moraes, Aníbal de;
Pesquisa Agropecuária Brasileira , 2011, DOI: 10.1590/S0100-204X2011001000038
Abstract: the objective of this work was to evaluate the rearing of lambs grazing on annual ryegrass (lolium multiflorum) in succession with corn or soybean crops, managed at moderate or low grazing intensities, with rotational or continuous grazing methods. the experimental design used was randomized blocks in a factorial arrangement 2 intensities x 2 grazing methods, with four replicates. there was no interaction between grazing intensities and methods. low grazing intensity provided higher forage mass and sward height. height and forage mass were higher in rotational grazing. there was no difference in average daily gain. there was significant difference in stocking rate for the rotational method and moderate grazing intensity. gain per hectare was higher for moderate grazing intensity. grazing intensity and grazing methods did not affect soybean or corn yields in succession. the forage available is the main determinant of yield of the integrated system, independently of the grazing method.
Desenvolvimento de novilhas de corte recebendo ou n?o suplementa??o energética em pastagem com diferentes disponibilidades de forragem
Pilau, Alcides;Rocha, Marta Gomes da;Restle, Jo?o;Silva, José Henrique Souza da;Freitas, Fabiana Kellermann de;Macari, Stefani;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000500008
Abstract: the effect of two herbage masses (hm) (1,200 or 1,500 kg/ha of dry matter - dm) and use of energy supplementation on performance of beef heifers grazing oat (avena strigosa schreb) plus annual ryegrass (lolium multiflorum lam) was evaluated. the heifers were assigned to the following treatments: lhmns - low herbage mass, no supplementation; hhmns - high herbage mass, no supplementation; lhms - low herbage mass + supplementation;hhms - high herbage mass + supplementation. the supplement utilized was ground sorghum grain, at the level of 0.7% of body weight (bw) per day. the grazing method was continuous with variable stocking rate; there were three replications per treatment combination. the variables evaluated were: forage allowance (fa), average daily weight gain (adg), body condition (bc), body weight of animals at 12 months of age (blw), crude protein and 'in vitro' digestibility of hand plucked herbage samples. the fa in hhm was greater than in lhm treatment, with values of 11 and 8 kg of dm/100 kg of bw, respectively. supplementation affected adg and bc. the adg were 0.778 and 0.559 kg/animal/day for supplemented and not supplemented heifers, respectively. the bc increased linearly during the grazing period. supplemented heifers body condition increased by 0.9 points (r2=96%) and those exclusively on pasture by 0.4 points (r2=74%), with lw gains of 115 and 187 kg for each additional point of bc. decrease of forage mass from 1.500 to 1.200 kg/ha dm did not affect heifer performance. supplemented animals had higher body weight gain and body condition than animals exclusively on pasture.
Característica produtiva e estrutural de pastos mistos de aveia e azevém manejados em quatro alturas sob lota??o contínua
Carvalho, Paulo César de Faccio;Rocha, Lemar Maciel da;Baggio, Carolina;Macari, Stefani;Kunrath, Taise Robinson;Moraes, Aníbal de;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000900001
Abstract: it was monitored variables related to production and structure of oat (avena strigosa schreb) and ryegrass (lolium multiflorum lam) pastures managed at four sward heights (10, 20, 30, and 40 cm) on continuous grazing with variable stocking (put and take). it was used crossbred beef steers at approximately 10 months of age and an average initial weight 190 kg in a complete random block design with three replicates. the type of sward height distribution in six different sample dates as well as the forage dry mass prediction through sward heights were investigated. forage mass linearly increased according to the sward height: for each 1-cm increase of the height above 10 cm, there was an approximately 107 kg dm/ha addition in the forage mass. there was no effect of sward height on the accumulation rate (55.8 kg dm/ha) neither on the dry matter total production (8,210 kg of dm/ha). frequency distributions fitted to the normal model in only one out of the 96 analyzed data series. gamma type distribution was the one that was the most frequently adjusted to sward height data, however, once grazing was started, pasture heterogeneity was so high that height distribution did not fit any of the investigated models. it is possible to estimate forage dry mass on the pasture by its average height so it is suggested to establish variable heights over the grazing cycle aiming to manage the heterogeneity caused by the animal.
Comportamento ingestivo de novilhas de corte submetidas a estratégias de suplementa??o em pastagens de aveia e azevém
Bremm, Carolina;Rocha, Marta Gomes da;Freitas, Fabiana Kellermann de;Macari, Stefani;Elejalde, Denise Adelaide Gomes;Roso, Dalton;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000700004
Abstract: it was evaluated the ingestive behavior of beef heifers on black oats (avena strigosa schreb.) and italian ryegrass (lolium multiflorum lam.) pastures under different strategies of supplementation and continuous stocking system. the treatments evaluated were: 'no supplement'- animals on black oats (bo) and italian ryegrass (ir) pasture; 'increasing' - animals on bo and ir pasture receiving increasing levels (0.3, 0.6, and 0.9% of live weight - lw) of supplement; 'fixed' - animals on bo and ir pasture receiving 0.9% of lw of supplement; and 'decreasing' - animals on bo and ir pasture receiving decreasing (1.5, 1.2, and 0.9% of lw) levels of supplement. structural sward characteristics (herbage mass, green herbage mass, herbage allowance, leaf blade allowance, leaf:stem ratio, and proportion of oats leaf blade and stem + sheath and proportion of ryegrass leaf blade and stem + sheath) and nutritive value (crude protein concentration, in vitro organic matter digestibility, total digestible nutrients, and neutral detergent fiber) were similar among strategies of supplementation and varied with pasture utilization periods. daily grazing time, ruminating time, idling time, time spent near the trough (min/day), and bite mass (g om/bite) varied with strategies of supplementation and sward characteristics. the biting rate/min was influenced only by grazing cycle.
On the Design of Effective E-Commerce Applications: An ISO-Based Lifecycle Model  [PDF]
Antonia Stefani
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.65002
Abstract: The provision of services as e-commodities and the wide use of networked business models have driven buyer experience to new heights. Innovation, coupled with quality is the competitive advantage e-commerce vendors strive to achieve when designing or re-designing their software. In terms of quality, evaluation stood in the spotlight for many years. However, software analysis and design based on quality models have been used mostly for understanding, rather than improving. In this work, we present a new model for the analysis and design of e-commerce software systems mapped to the software life-cycle process. Quality control procedures are mapped to every phase, from initiation and design to delivery. Based on current ISO standards such as ISO25000 series, this work discusses technical and managerial principles that need to be applied in order to obtain quality e-commerce software.
Desenvolvimento de bezerras de corte após a desmama sob níveis de concentrado
P?tter, Luciana;Rocha, Marta Gomes da;Macari, Stefani;Roman, Juliano;Roso, Dalton;Glienke, Carine Lisete;Rosa, Aline Tatiane Nunes da;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010005000169
Abstract: it was evaluated the performance of beef heifers receiving different levels of supplement: 0; 0.3; 0.6 and 0.9% of body weight day-1, in black oats (avena strigosa schreb.) plus italian ryegrass (lolium multiflorum lam.) pasture. the experimental design was completely randomized with four treatments and two area replicates. beef heifers from different treatments had access to the same forage allowance (herbage mass and supply of green leaves). increases on supplement quantity positively interfered on average daily gain, stocking rate, weight gain per area and forage transformation efficiency. supplemented heifers had greater weight and body condition at 13 months of age than the non supplemented ones. in black oats plus italian ryegrass pasture, providing up to 0.9% of body weight of the animal concentrate supplementation is an alternative for obtaining heavier heifers and in better body condition score.
Desempenho e características das carca?as de novilhos superprecoces em pastos hibernais submetidos a intensidades de pastejo
Rocha, Lemar Maciel da;Carvalho, Paulo César de Faccio;Baggio, Carolina;Anghinoni, Ibanor;Lopes, Marília Lazzarotto Terra;Macari, Stefani;Silva, Jamir Luis Silva da;
Pesquisa Agropecuária Brasileira , 2011, DOI: 10.1590/S0100-204X2011001000035
Abstract: the objective of this work was to assess the grazing intensity effects on the finishing of yearling bulls, in winter pastures in succession to soybean crop. sward pre-grazing different heights of mixed pasture between ryegrass and oat were evaluated: 10, 20, 30 and 40 cm. a randomized complete block design was utilized with three replicates. ten-month-old beef crossbred bulls were used, with initial live weight of 192±12 kg. the following variables were evaluated: forage mass and allowance, sward height, forage daily accumulation rate and forage total accumulation, average daily weight gain (adg), stocking rate and weight gain per unit area (ga), as well as the qualitative characteristics of the carcasses. the yearling bulls were slaughtered at 14 months of age. adg fitted a quadratic model, with maximum performance between 20 and 25-cm sward height, while ga fitted a negative linear model. yearling bulls showed a satisfactory carcass quality when pastures were managed with pre-grazing heights higher than 10 cm. it is possible to finish yearling bulls in the pasture phase of integrated production systems, during winter, in succession to soybean crop. the management of ryegrass and oat mixed pastures at sward pre-grazing heights of 20 and 25 cm optimize individual animal performance and per area unit.
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