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Search Results: 1 - 10 of 436293 matches for " Mércia Virgínia Ferreira dos;Cunha "
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Histology of the stems of elephantgrass clones in the wasteland of Pernambuco Histologia do colmo de clones de capim-elefante na regi o do agreste de Pernambuco
Geane Dias Gon?alves Ferreira,Márcio Vieira Cunha,Dulciene Karla de Andrade Silva,Mércia Virgínia Ferreira dos Santos
Revista Brasileira de Saúde e Produ??o Animal , 2010,
Abstract: The objective of this work was to determine the percentages of lignin, cellulose and the thickness of the epidermis through histological cuts of the stems of elephantgrass clones (Bua u/112 x Cuba 116-15,3, Itambé II-2.53, Bag-50, Taiwan-146-2.26, Taiwan A-146, Itambé IV-4, ItambéII-2.3 and Cuba-116 x of Roxo Botucatu-17.27), in three different strata of stems (basal, medium and apical region), registering morpho-anatomical characteristics that can affect grass quality. Clones were collected from established area in the Experimental Station of the Agronomical Company of research in Pernambuco (IPA). A completely randomized experimental design was set in a factorial 8 x 3 x 3 (eight clones, three strata, and three tiges). Significant differences were observed (P< 0,05) between clones evaluated. The clone Itambé II-2.53 and Itambé II-2.3 presented lower values of cellulose in the medullar region associated with higher values of lignin in the region of the cortex, in relation to the others clones evaluated. The basal region of stems presented higher lignin texts, as much in the cortex, as in the medullar region. The results evidenced the importance of histological evaluations in the selection of forages grass destined to animal feeding. Objetivou-se determinar as propor es de lignina, celulose e a espessura da epiderme por meio de cortes histológicos dos colmos de clones de capim-elefante (Bua u/112 x cuba 116-15.3, Itambé II–2.53, Bag-50, Taiwan-146-2.26, Taiwan A-146, Itambé IV-4, ItambéII-2.3 e Cuba-116 x Roxo de Botucatu-17.27), em três diferentes estratos do colmo da planta (regi o basal, mediana e apical). Foram registrados caracteres morfo-anat micos que possam interferir na qualidade da planta. Os clones foram coletados em área já estabelecida na Esta o Experimental da Empresa Pernambucana de Pesquisa Agropecuária (IPA). O delineamento experimental utilizado foi inteiramente casualizado em fatorial 8 x 3 x 3 (oitos clones, três estratos e três perfilhos. Observaram-se diferen as significativas entre os clones avaliados, e os clones Itambé II–2.53 e Itambé II-2.3 foram os que apresentaram menores quantidades de celulose na regi o medular, associadas a menores quantidades de lignina, na regi o do córtex, em rela o aos demais clones avaliados. A regi o basal do colmo foi a que apresentou maiores quantidades de lignina, tanto no córtex, como na regi o medular. Os resultados encontrados evidenciam a importancia das avalia es histológicas na sele o de plantas forrageiras destinadas à alimenta o animal.
Repetibilidade e respostas de características morfofisiológicas e produtivas de capim-elefante de porte baixo sob pastejo
Viana, Bruno Leal;Mello, Alexandre Carneiro Le?o de;Lira, Mário de Andrade;Dubeux Júnior, José Carlos Batista;Santos, Mércia Virgínia Ferreira dos;Cunha, Márcio Vieira da;Ferreira, Geane Dias Gon?alves;
Pesquisa Agropecuária Brasileira , 2009, DOI: 10.1590/S0100-204X2009001200024
Abstract: the objective of this study was to estimate the coefficients of repeatability and determination (r2) and the minimum number of measurements necessary to predict the real value of morphophysiological and yield variables, as well as the responses to sheep-grazing of dwarf elephant grass pasture. the experiment was carried out in a randomized block design with five treatments - taiwan a-146 2.27, taiwan a-146 2.37, taiwan a-146 2.114, merker méxico mx 6.31 and mott - and four replicates, over five grazing cycles, between september 2008 and april 2009. mean sward height, leaf area index (lai), light interception (li), mean leaf angles (mla), silage accumulation (sa) and silage accumulation rate (sar) were evaluated. for the variables lai, il and mean sward height of plants, in long cycles, only one measurement was necessary (r2 = 80%) to place them among the most predictable characteristics in the evaluation of elephant grass clones. assessments for sa and sar need longer experimental periods for greater reliability in the estimation of response variables. in dwarf elephant grass, light interception increases with sward height and lai.
Análise de trilha em caracteres produtivos de Pennisetum sob corte em Itambé, Pernambuco
Silva?, M?nica Alixandrina da;Lira, Mario de Andrade;Santos, Mércia Virgínia Ferreira dos;Dubeux Junior, José Carlos Batista;Cunha, Márcio Vieira da;Freitas, Erinaldo Viana de;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000700007
Abstract: this work aimed to estimate the correlation coefficients, determining the direct and indirect effects (path analysis) of explanatory independent variables on total dry matter production (main dependent variables) of five elephant grass clones in five cuts accomplished at the forest zone of pernambuco. each experimental plot measured 24 m2 with 2 m2 of utile area. there was high correlation between almost all the independent variables and the main variable. the characteristic leaf blade number per tiller, however, explained better the potential of dry matter production and leaf blade dry matter production, acting, respectively, in a direct and indirect way on the explanatory variables.
Usos de especies le osas de la caatinga del municipio de Floresta en Pernambuco, Brasil: conocimiento de los indios de la aldea Travess o do Ouro Uses of the woody species of the caatinga in Floresta, Pernambuco, Brazil: Indigenous knowledge in the Village Travess o do Ouro
José Serafim Feitosa Ferraz,Rinaldo Luiz Caraciolo Ferreira,Mércia Virgínia Ferreira dos Santos,Isabelle Maria Jacqueline Meunier
Bosque (Valdivia) , 2012,
Abstract: Las especies le osas de la caatinga, vegetación del semiárido del nordeste de Brasil, han sido utilizadas sin conocer los impactos ocasionados al medio ambiente. Este estudio tuvo como objetivo conocer los tipos de uso de la vegetación local por peque os productores rurales de una población indígena en el municipio de Floresta, Pernambuco, Brasil. La investigación se realizó mediante observación directa, en visitas guiadas y entrevistas semiestructuradas. La flora le osa local fue reconocida por los entrevistados que atribuyeron usos para 27 especies le osas arbóreas y arbustivas. Los tipos de uso mencionados para la flora fueron organizados en las categorías: alimentación humana, forraje, construcciones residenciales, construcciones rurales, tecnología, combustibles, medicinales y otros usos no madereros. El uso como forraje se relacionó a los mayores números de especies citadas y de citaciones, seguido por construcciones rurales, combustible y construcciones residenciales. Las especies con mayor número de categorías de usos fueron Myracrodruon urundeuva, Anadenanthera columbrina y Cnidoscolus quercifolius. Spondias tuberosa fue la especie más citada como forraje, seguida por C. quercifolius, Commiphora leptophloeos, Schinopsis brasiliensis y M. urundeuva. Se observó que el uso de la vegetación le osa como madera y le a, en general se hace utilizando la madera que se encontró muerta. Desde la perspectiva de los usuarios, la vegetación le osa de la caatinga está destinada principalmente al forraje: de este modo se muestra la importancia de la ganadería extensiva como actividad de subsistencia y su influencia en el conocimiento de los usos de la vegetación. Woody species of caatinga, vegetation of a semiarid region of Northeastern Brazil, have been used without knowing the impacts caused to the environment. This study aimed to identify the uses of local vegetation by small farmers of an indigenous population in the municipality of Floresta, Pernambuco. The research was conducted by direct observation, guided visits and semi structured interviews. The woody flora of the region was properly recognized by the interviewees and uses were attributed for 27 species of this woody-shrub of caatinga. The types of uses mentioned for the flora were organized into categories of uses: human food, fodder, domestic construction, farm buildings, technology, energy (fuels), medicinal and other uses of non-timber products. The fodder was related to greater numbers of species cited and numbers of citations, followed by rural buildings, energy and residential construction. T
Efeitos da Aduba o e de Nematicida no Crescimento e na Produ o da Palma Forrageira (Opuntia ficus indica Mill) cv. Gigante
Teles Margareth Maria,Santos Mércia Virgínia Ferreira dos,Dubeux Júnior José Carlos Batista,Bezerra Neto Egídio
Revista Brasileira de Zootecnia , 2002,
Abstract: O experimento foi realizado em telado do Departamento de Zootecnia da UFRPE, objetivando medir o efeito da aduba o e de nematicida no crescimento e produ o da palma, com sintoma de amarelecimento. Os tratamentos experimentais constaram da adi o ou n o de macronutrientes, micronutrientes e de nematicida em um delineamento experimental em blocos casualizados. Para número de cladódios primários, a análise de variancia demonstrou efeito n o significativo pelo teste F. Para número total de cladódios, número de cladódios secundários, área de cladódio, índice de área de cladódios e produ o de matéria seca, a análise de variancia revelou efeito significativo. N o houve efeito dos micronutrientes e de nematicida no grupo dos tratamentos de Solu o de Macronutrientes Completa para número de cladódios primários, número de cladódios secundários, área de cladódio, índice de área de cladódios e produ o de matéria seca, sendo a média geral 1,56; 0,84; 811,11 cm2; 1,15 e 42,73 g/vaso, respectivamente.
Rumen ciliate protozoa in sheep raising in the caatinga region of Pernambuco State, Brazil Popula o de protozoários ciliados no rúmen de ovinos criados na caatinga de Pernambuco
Daniele Silva de Matos,Adriana Guim,?ngela Maria Vieira Batista,Mércia Virgínia Ferreira dos Santos
Revista Brasileira de Saúde e Produ??o Animal , 2008,
Abstract: This work sought to determine the number and genus of rumen ciliate protozoa in caatinga sheep raising, before and four hours after feeding them. There were collected 10 mL of ruminal fluid which was fixed in 10 mL of 10% formalin. After counting and identification of genera, the variables were submitted to variance analysis, the means compared by Tukey test and accomplished of simple correlation test between protozoa and chemical composition diet. Among found genera there was predominance of Entodinium (around 90%). Holotricha subclass only Isotricha genus was registered which represented 1.94% of population. The percentage of protozoa only varied (P <0.05) for Eodinium genus. It’s highest variation was showed in May 2005. Related to the collection schedule, only the pH, the medium number of Entodinium gender and total number of protozoa presented significant difference, being larger before feeding the animals. Other genera also presented the same behavior, thus reflecting the stability of ruminal environment for animals without access to night feeding. The protozoa of Entodiniomorphid subclass present high positive correlation with level of total digestible nutrients and crude protein of the diet. This reflects the necessity, for microorganism, of energy and protein for synthesis (cellular division) and storage. Objetivou-se com este trabalho determinar o número e gênero de protozoários ciliados no rúmen de ovinos criados na caatinga antes da alimenta o e quatro horas após. Foram coletados 10 mL de fluido ruminal, fixados em 10 mL de formalina a 10 %. Após contagem e identifica o dos gêneros, as variáveis foram submetidas à análise de variancia, as médias comparadas pelo teste de Tukey, sendo, ainda, realizado o teste de correla o simples entre protozoários e a composi o química da dieta. Dentre os gêneros encontrados, houve predominancia do gênero Entodinium (em torno de 90%). Da subclasse Holotricha, foi registrado somente o gênero Isotricha que representou em média 1,94% da popula o. A percentagem de protozoários só variou (P<0,05) para o gênero Eodinium, sendo maior em maio de 2005. Com rela o ao horário de coleta, somente o pH, a concentra o média do gênero Entodinium e o número total de protozoários apresentaram diferen a significativa, sendo maior antes da alimenta o. Os protozoários da subclasse Entodiniomorpha apresentam correla o positiva (P<0,05) com o nível de nutrientes digestíveis totais e a proteína bruta da dieta, o que reflete a necessidade, pelo microrganismo, de energia e proteína para a síntese (divis o celular) e armazena
Coeficiente de repetibilidade e parametros genéticos em capim-elefante
Cavalcante, Marcelo;Lira, Mário de Andrade;Santos, Mércia Virgínia Ferreira dos;Pita, Eduardo Bruno Afonso Ferreira;Ferreira, Rinaldo Luiz Caraciolo;Tabosa, José Nildo;
Pesquisa Agropecuária Brasileira , 2012, DOI: 10.1590/S0100-204X2012000400013
Abstract: the objective of this work was to determine the coefficients of repeatability of morphophysiological traits in elephant grass (pennisetum spp.) genotypes, from data obtained during six evaluation cycles. the minimum number of measurements and genetic parameters were estimated. the experiment design was a randomized complete block, in a split?plot arrangement, with four n levels (control, 30, 60, and 90 kg ha?1 per cut) and 16 pennisetum genotypes (11 interspecific hybrids and five cultivars). the cycles consisted of evaluations in 2010 (4/21, 7/19, and 9/28) and 2011 (1/6, 4/7, and 8/3). the coefficients of repeatability were of medium?high magnitude for all variables, indicating that there was regularity between repeated measures. for the variables forage mass, plant height, leaf length and width, stem diameter, leaf chlorosis and area index, three cycles of evaluation are enough to reach r2 of 90% by principal component analysis. for internode length, the minimal of seven evaluations is necessary to predict the true value of genotypes. the genetic parameters of the variables forage mass, leaf length and width, stem diameter and leaf chlorosis are of high magnitude, favoring the selection of superior pennisetum genotypes.
Avalia o bromatológica de espécies arbóreas e arbustivas de pastagens em três municípios do Estado de Pernambuco = Chemical composition of tree and bush species occurring in pastures of three locations in Pernambuco State
Anália Carmem Silva de Almeida,Rinaldo Luiz Caraciolo Ferreira,Mércia Virgínia Ferreira dos Santos,José Ant?nio Aleixo da Silva
Acta Scientiarum : Animal Sciences , 2006,
Abstract: A pesquisa foi realizada nos Campos Experimentais de Itambé, Caruaru e Serra Talhada, pertencentes à Empresa Pernambucana de Pesquisa Agropecuária, e objetivou avaliar características bromatológicas de espécies arbóreas e arbustivas de pastagens. Para análises bromatológicas foram coletadas, nas épocas seca e chuvosa, amostras compostas de folhas e galhos com até 5,0 cm de diametro de espécies arbóreas e arbustivas presentes em áreas de pastagens. Os teores médios de MS das plantas foram de 38,89%, 48,27% e 55,20% nos Municípios de Itambé, Caruaru e Serra Talhada, respectivamente. Para PB, observou-se valores de 15,87%, 14,09% e 10,19%, respectivamente. Os valores de FDN e de FDA foram de 52,37% e 37,63%, 46,33% e 30,33%, 50,25% e 35,07%, respectivamente. As espécies, independente do local, apresentaram melhor composi o bromatológica no período chuvoso.Para utiliza o de espécies em sistemas silvipastoris, além da avalia o de características qualitativas, devem-se considerar aspectos de facilidade de propaga o, adapta o às condi es edafoclimáticas, tipo de animal e objetivo do sistema de produ o animal. The research was conducted at the Experimental Fields of Itambé, Caruaru and Serra Talhada, owned by the Agricultural Research Companyof Pernambuco (IPA). The aim was to analyze the chemical characteristics of tree and bush species grown on pasture land. In each Experimental Station, data was collected from a random sampling, during the dry and rainy seasons. Samples consisted of leaves and branches up to 5.0 cm of diameter. The average MS concentrations were 38.89, 48.27 and 55.20%. As for PB, the values observed were 15.87, 14.09 and 10.19%. The NFD and ADF concentrations were 52.37 and 37.63, 46.33 and 30.33, 50.25 and 35.07%, for Itambé, Caruaru and Serra Talhada, respectively. The studied species, independent of the region, presented better chemistry composition during the rainy season. Thus, for an adequate selection of species in silvopastoral systems, besides the evaluation of qualitative characteristics, other aspects should also be taken into consideration such as propagation,adaptation to the soil and climate conditions, animal type and objective of the animal system production.
Avalia??o de clones de capim-elefante (Pennisetum purpureum Schum.) e de um híbrido com o milheto (Pennisetum glaucum (L.) R. Br.) submetidos a estresse hídrico. 1. Parametros morfológicos
Barreto, Glesser Porto;Lira, Mário de Andrade;Santos, Mércia Virgínia Ferreira dos;Dubeux Júnior, José Carlos Batista;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000100001
Abstract: this trial was carried out to evaluate the morphological characteristics of three elephant grass clones (cameroon, roxo de botucatu and mott) and an elephant grass with pearl millet hybrid (hv-241) submitted to two humidity regimes (with and without water stress). a randomized block design with split plots and three replicates was used. in the main plot, the effect of the humidity regimes was studied, and in the split plot, the different clones. plants submitted to water stress showed lower height, and none of them showed internodes above cutting height (10 cm). as a result of water stress, the plant height reductions were 42.7% (cameroon), 35.05% (roxo de botucatu), 28.54% (hybrid hv-241) and 27.43% (mott). leaf blade length was reduced from 69.9 cm, in the wet treatment, to 50.0 cm in those submitted to water stress, whereas leaf blade width average of water stress plants was less than a half of that in wet treatment plants. water stress did not disturb tillering of cultivars but, in hv-241 hybrid, it reduced both the number of lateral tillers/plant and total number of tillers/plant. in both humidity regimes, hybrid hv-241 was the clone, which showed the largest tillering. it was observed that, except for tillering of cultivars, water stress promoted a reduction on the other morphologic studied parameters.
Avalia??o de clones de capim-elefante (Pennisetum purpureum Schum.) e de um híbrido com o milheto (Pennisetum glaucum (L.) R. Br.) submetidos a estresse hídrico. 2. Valor nutritivo
Barreto, Glesser Porto;Lira, Mário de Andrade;Santos, Mércia Virgínia Ferreira dos;Dubeux Júnior, José Carlos Batista;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000100002
Abstract: this trial aimed to study the nutritive value of three elephant grass clones (cameroon, roxo de botucatu and mott) and an elephant grass with pearl millet hybrid (hv-241) cultivated under two different humidity conditions (with and without water stress). a randomized block design with split plots and three replicates was used. in the main plot, the effect of the humidity regimes was studied and in the split plot, the different clones. the dry matter (dm); crude protein (cp) and of neutral detergent fiber (ndf) content; and in vitro dry matter disappearance (ivdmd) were analyzed. the materials submitted to water stress showed a high dehydration level (more than 58% of dm), mainly in elephant grass cultivars. plants submitted to water stress exhibited cp content (17.8%) significantly higher when compared to those plants submitted to the water treatment (14.45%), although, among cultivars, only cameroon (14.68% cp) differed from the others (16.46%pb). as ndf contents, difference among the two humidity regimes was not observed, but mott and cameroon cultivars showed higher contents (61.79%) in relation to those of roxo de botucatu cultivar and hv-241 hybrid (56.60%). difference in ivdmd among humidity regimes was not observed neither among the different clones and the average value was 53.07%.
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