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Search Results: 1 - 10 of 24854 matches for " Rinaldo Luiz Caraciolo;Mello "
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Produtividade e composi??o química de gramíneas tropicais na Zona da Mata de Pernambuco
Santos, Mércia Virginia Ferreira dos;Dubeux Júnior, José Carlos Batista;Silva, Maria da Concei??o;Santos, Stuart Francisco dos;Ferreira, Rinaldo Luiz Caraciolo;Mello, Alexandre Carneiro Le?o de;Farias, Iderval;Freitas, Erinaldo Viana de;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000400006
Abstract: this work was carried out to evaluate the productive potencial and chemical composition of five grasses (pennisetum purpureum schum. cv. pioneiro, p. purpureum schum cv. mott; panicum maximum jacq. cv. momba?a, p. maximum jacq cv. tanzania, e brachiaria brizantha (hochst) stapf. cv. marandu). the cuts were performed at 35 days of intervals and 40 cm above ground. pioneiro showed higher dm yield (7.35 t dm/ha/35 days) when compared to the dwarf elephantgrass (5.28 t dm/ha/35 days) and tanzania grass (5.23 t dm/ha/35 days), being similar to the others. brachiaria brizantha presented the highest total tillering (538.72/m2) however the aerial tiller weight was the lowest for this species. the cultivars of p. purpureum showed higher aerial tillering and lower basal tillering, when compared to the cultivars of p. maximum. the cp concentration ranged from 6.96 to 10.20% and the cultivar pioneiro presented the highest value. no difference was found among the forages for ndf and adf, and the mean values were 73.83 and 39.20%, respectively. at the evaluated cut interval, the forages presented a high proportion of leaves (> 80%), showing potential to be used on livestock pasture-based operations in the forest zone of pernambuco.
Características estruturais e morfológicas de genótipos de Pennisetum sp. sob pastejo no período de seca
Cunha, Márcio Vieira da;Santos, Mércia Virginia Ferreira dos;Lira, Mário de Andrade;Mello, Alexandre Carneiro Le?o de;Ferreira, Rinaldo Luiz Caraciolo;Freitas, Erinaldo Viana de;Nunes, José Carlos;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000300004
Abstract: the experiment was carried out to study structural and morphologic characteristics of five pennisetum sp. genotypes (ce 08 a.d., venezuela, hv-241, elephant b and hexaplóide) under grazing during the dry period in pernambuco forest zone. genotypes were managed under rotational stocking (44 days of resting and four days of grazing period). the experimental design was randomized blocks in a split plot arrangement, and four replications. the genotypes represented the plots, and grazing cycles, the subplots. there was variation in the structural and morphologic characteristics of the pennisetum sp. genotypes. the ce 08 a.d. and elephant b presented high density of green leaf blade, low percentage of dead material and high density of remaining basal tillers and new aerial tillers, with averages of 5.0±0.4 kg dm/ha/cm; 33±0.2%; 22±0.2 and 146±0.4 tillers/m2, respectively. the hv-241 presented high participation of dead material in its aerial biomass (55.6±0.3%) due to high tiller mortality (19±0.3 and 114±0.4 basal and aerial dead tillers/m2, respectively). the genotypes ce 08 a.d. and elephant b had been distinguished as promising to be used under grazing in the dry period. the genotype hv-241, elephantgrass hybrid with pearl millet, was more affected by water stress during the dry period of the year.
Ensaios preliminares sobre autofecunda??o e cruzamentos no melhoramento do capim-elefante
Silva, Maria da Concei??o;Santos, Mércia Virginia Ferreira dos;Lira, Mário de Andrade;Mello, Alexandre Carneiro Le?o de;Freitas, Erinaldo Viana de;Santos, Ramilton Jader Menezes;Ferreira, Rinaldo Luiz Caraciolo;
Revista Brasileira de Zootecnia , 2008, DOI: 10.1590/S1516-35982008000300004
Abstract: the objectives of this work were to evaluate the self-pollination as a tool in the elephantgrass (pennisetum purpureum) breeding and to compare progenies of pennisetum purpureum origined from different breeding strategies: self-pollination, intraspecific crossbreeds, and interspecific crossbreeds with pennisetum glaucum. the experimental treatments were represented by the three fecundation forms: intraspecific crossbreed, interspecific crossbreed and self-pollination. a total of ten families originated from intraspecific crossbreed resulting in 160 progenies; two families originated from interspecific crossbreed resulting in 38 progenies, and two families originated from self-pollination resulting in 40 progenies, was evaluated. the evaluated traits were dry matter production (kg/tussock), dry matter concentration (%), plant height (m), number of basal tillers (n./tussock) and survival index (%), in two evaluations and non-replicated plots. the intraspecific crossbreed, interspecific crossbreed and self-pollination presented average dry matter production of 0.47, 0.78, and 0.46 kg of dm/tussock, at first evaluation and 0.14, 0.23, and 0.22 kg of dm/ tussock, at second evaluation, respectively. this indicates the necessity of plot replication to separate the environmental effect from the genetic effect. the interspecific crossbreed showed potential to generate progenies with satisfactory dry matter concentration which is more appropriated for ensiling. the treatments showed potential to release variability of traits evaluated through vegetative propagation, however, the low survival index of self-pollinated progenies reduces the probability of obtaining pure lines of elephantgrass.
Degrada??o ruminal da matéria seca de clones de capim-elefante em fun??o da rela??o folha/colmo
Mello, Alexandre Carneiro Le?o de;Lira, Mário de Andrade;Dubeux Júnior, José Carlos Batista;Santos, Mércia Virginia Ferreira dos;Ferreira, Rinaldo Luiz Caraciolo;Cunha, Márcio Vieira da;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000500009
Abstract: the objective of this work was to evaluate the influence of leaf/stem ratio (l/s) in the in situ dry matter degradability (isdmd) of elephantgrass clones. the experiment was carried out at ipa experimental station, in vitória de sto. ant?o, pe. two groups of elephantgrass clones were studied: group i (cameroon, mercker méxico, três rios, elefante de pinda and gua?u/iz), characterized by its high l/s ratio, and group ii (ce 08 a.d., taiwan a-25, goiano, ce 03 a.d. and merc.), with low l/s ratio. samples of whole plant harvested in the 60th day of growth in the dry period were dried and milled and incubated in the rumen of the two crossbred bovines for 0, 6, 12, 24, 48, 72 e 96 hours to determine the isdmd and ruminal fermentation parameters. the experimental design was randomized blocks in split-plot arrangement. there wasn't any significant difference between groups of elephantgrass as defined by their isdmd. the degradation characteristics averaged 79.40, 69.10, 26.90, 52.60, 20.60%, and 5.50%/h for potential degradability, effective degradability, soluble fraction, potentially degradable fraction, no degraded fraction, and degradation rate, respectively. the leaf/stem ratio did not influence the isdmd of elephantgrass clones.
Avalia??o de testes estatísticos de compara??es múltiplas de médias
Sousa, Clayton Albuquerque de;Lira Junior, Mario Andrade;Ferreira, Rinaldo Luiz Caraciolo;
Revista Ceres , 2012, DOI: 10.1590/S0034-737X2012000300008
Abstract: the objective was to verify the efficiency and uniformity of responses from different tests to compare means and the rate of occurrence of type i error. four different tests for multiple comparison of means were applied to 200 experiments and 10 variables created with random values, to assess the number of levels; agreement with the f test and rate of occurrence of type i error per variable and per experiment. the tests differed in their results for all variables. the greatest divergences in results were found when using the lsd test. for the level of significance, the greatest agreement was found by the tukey test.
Germina??o de sementes de Adenanthera pavonina L. em fun??o de diferentes temperaturas e substratos
Souza, Ednaldo Bezerra de;Pacheco, Mauro Vasconcelos;Matos, Valderez Pontes;Ferreira, Rinaldo Luiz Caraciolo;
Revista árvore , 2007, DOI: 10.1590/S0100-67622007000300009
Abstract: this work studied the germination of a. pavonina seeds in different conditions of temperature regime and substrate. the experiment was arranged in a 6 x 5 factorial, complete randomized design (6 substrates - sowing in and on: coconut fiber, sand and vermiculite; and 5 temperatures: 25, 30, 35, 20-30 and 20-35oc), with four replications with 25 seeds each. the following parameters were analyzed: germination (%), first germination count (%), index of germination speed, length (cm/seedling) and dry matter weight (mg/seedling). the best results of germination were obtained at 30 and 35oc in all substrates. coconut fiber and sand substrates allowed satisfactory germinative performance, proving to be suitable for the evaluation of the physiological quality of a. pavonina seeds.
Modelo para calculo estimación del carbono en Tipo Forestal Roble-Raulí-Coigüe en la Reserva Nacional Malleco: Chile
Moreno Garcia, Norman;Herrera Machuca, Miguel Angel;Ferreira, Rinaldo Luiz Caraciolo;
Revista árvore , 2011, DOI: 10.1590/S0100-67622011000700016
Abstract: the aim of this work is the selection of a model for estimation of carbon in forest type roble-raulí and coigüe. the compilation of information was performed in the malleco national reserve. every site was represented by a group of 5 plots (squared, sides 35m, surface 1225m2), located in a transect according to the greatest slope. the volumes of wood were estimated with and without bark of the individuals totality by means of functions for every species of the forest type in the study. the quantity of carbon stored at the shaft level of the plots was estimated by applying the universal function of carbon. in every plot the trees were assessed by a diametric class of dap, being defined as the classes from the minimal dap of 3 cm and with an extent of 5 cm. the models of spurr, meyer, stoate, naslund and schumacher-hall were adjusted accordingly. the schumacher-hall model presented the best adjustment according to the considered statistical indicators, besides a better residual distribution.
Ecological succession of a stretch of Dense Rain Forest in the Lowlands, Carauari, Amazonas, Brazil Sucess o ecológica de um trecho de Floresta Ombrófila Densa de Terras Baixas, Carauari, Amazonas
Rosival Barros de Andrade Lima,José Ant?nio Aleixo da Silva,Luiz Carlos Marangon,Rinaldo Luiz Caraciolo Ferreira
Pesquisa Florestal Brasileira , 2011, DOI: 10.4336/2012.pfb.67.161
Abstract: This work was carried out in a stretch of Dense Rain Forest in the lowland county of Carauari, Amazonas, aiming to estimate the species composition of tree layer and classify the species in their ecological groups in order to obtain information about the current situation of the forest fragment, to be the basis for strategies for conservation and preservation as well as the basis for formulating research aimed at the dissemination of knowledge and its application to sustainable production. The forest inventory was conducted in an area of 275 ha, crossed by three transects (822 m, 1,265 m and 2,349 m), totaling 4.436 m. Plots were installed in 20 m x 25 m, 50 m equidistant, merged to the right and left of the line transect, totaling 66 sampling units. All tree individuals trees that had a circumference of 1,30 m above the ground (CAP) ≥ 25 cm were identified and measured. There were 3,050 individuals distributed in 133 species, 93 genera and 49 families. It was observed that the species of early succession (pioneer + early secondary) were more numerous, showing characteristics of a forest in early successional stage. doi: 10.4336/2011.pfb.31.67.161 O presente trabalho foi realizado em um trecho de Floresta Ombrofila Densa de Terras Baixas no Municipio de Carauari, Amazonas, tendo como objetivo estimar a composicao floristica do estrato arboreo e classificar as especies nos respectivos grupos ecologicos, a fim de se obter informacoes sobre a atual situacao do fragmento florestal, para embasar estrategias de conservacao e preservacao, bem como embasar a formulacao de pesquisas que visem a disseminacao do conhecimento e sua aplicacao na producao sustentavel. O inventario florestal foi realizado em uma area de 275 ha, cortada por tres transectos (822 m, 1.265 m e 2.349 m), totalizando 4.436 m. Foram instaladas parcelas de 20 m x 25 m, equidistantes a cada 50 m e intercaladas a direita e a esquerda da linha do transecto, totalizando 66 unidades amostrais. Foram identificados e medidos todos os individuos arboreos que apresentaram circunferencia a 1,30 m do solo (CAP) ≥ 25 cm. Registraram-se 3.050 individuos, distribuidos em 133 especies, 93 generos e 49 familias. Quanto a classificacao sucessional, as especies de inicio de sucessao (pioneiras + secundarias iniciais) foram em maior numero, demonstrando caracteristicas de uma floresta em estagio inicial no desenvolvimento sucessional. doi: 10.4336/2011.pfb.31.67.161
Avalia??o do comportamento de espécies de Eucalyptus spp. na Zona da Mata Pernambucana. I: Resultados do primeiro ano - 2001
Coutinho, Jo?o Luis Barboza;Santos, Venézio Felipe dos;Ferreira, Rinaldo Luiz Caraciolo;Nascimento, José Carlos Barboza;
Revista árvore , 2004, DOI: 10.1590/S0100-67622004000600001
Abstract: due to its high rainfall and predominance of hot climate conditions all over the year, the 'dry rainfall' region of the state of pernambuco, located in the northeastern part of brazil, appears to be suitable to the growth and development of many forest tree species such as those of the genus eucalyptus. in this trial, seedlings of 10 eucalyptus species were tried, namely: eucalyptus saligna sm., e. dunnii maiden, e. benthamii maiden & cambage, e. tereticornis sm., e. urophylla s.t. blake, e. pilularis sm., e. camaldulensis dehnh., e. robusta sm., e. grandis w. hill ex maiden and e. citriodora hook. observations and measurements will be carried out during seven years, taking into account mainly: survival (%), plant height and crown width. a complete randomised block experimental design was used with four replicates, with 35 plants per plot. at the first evaluation, held 12 months after planting, the following data were obtained: the majority of eucalyptus species showed a survival rate higher than 95,0%; in relation to forked trees, only e. dunnii, has not presented such characteristic, while e. citriodora. showed the highest rate (35%) and the others, values below 15%; highest plant height and diameter at breast heigth (dbh) were found among seedlings of e. citriodora, e. urophylla, e. camaldulensis, e. saligna e. grandis and e. dunnii.
Efeito de temperaturas e substratos na germina??o de sementes de Myracrodruon urundeuva Fr. All. (Anacardiaceae)
Pacheco, Mauro Vasconcelos;Matos, Valderez Pontes;Ferreira, Rinaldo Luiz Caraciolo;Feliciano, Ana Lícia Patriota;Pinto, Kedma Maria Silva;
Revista árvore , 2006, DOI: 10.1590/S0100-67622006000300006
Abstract: myracrodruon urundeuva fr. all. (anacardiaceae) is a native tree specie with excellent physical, chemical and biological properties. however, due to predatory exploration, it is in the official list of brazilian species threatened with extinction. this work aimed at studying the germination of m. urundeuva seeds in different conditions of substrate and temperature regime. the experiment was a completely randomized design in a 8 x 7 factorial arrangement (7 temperatures 25, 27, 30, 35, 20-27, 20-30 and 20-35oc; and 8 substrates - sowing in and on: blotting paper, sand, vermiculite and coconut fiber) with four replications with 25 seeds. the following parameters were analyzed: germination (%), first germination count (%), germination speed index, average time of germination (days), and length (cm) of hipocotyl and primary root. constant temperatures gave the shortest average time of seed germination and favored hipocotyl development. the best results for germination were obtained at 25 and 27oc in all substrates, except for sowing in between blotting paper at 27oc. the vermiculite and coconut fiber substrates allowed satisfactory germinative performance and did not require daily remoisten, proving to be suitable for the evaluation of the physiological quality of m. urundeuva seeds.
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