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Search Results: 1 - 10 of 385841 matches for " Paulo César de Faccio;Oliveira "
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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.
COMPORTAMENTO INGESTIVO DE EQüINOS EM PASTEJO SOBRE DIFERENTES DOSSéIS GRAZING BEHAVIOR HORSES ON DIFFERENT SWARDS
Jo?o Ricardo Dittrich,Paulo César de Faccio Carvalho,Anibal de Moraes,Edilson Batista de Oliveira
Ciência Animal Brasileira , 2007,
Abstract: Investigou-se o comportamento de eqüinos em pastejo de dosséis compostos por quatro espécies, em experimento desenvolvido na fazenda experimental da Universidade Federal do Paraná, no mês de abril de 2000. Os dosséis foram assim compostos: tifton 85 em mistura com o trevo branco e o cornich o; tifton 85, trevo branco e cornich o em faixas; paspalum em mistura com o trevo branco e o cornich o; paspalum, trevo branco e cornich o em faixas. Marcaram-se quarenta plantas de cada espécie, em cada dossel. Nas gramíneas, mediu-se a altura estendida e nas leguminosas quantificou-se o número de folhas. Doze eqüinos (250 kg) pastejaram a área durante cinco dias. A preferência entre os dosséis foi por localiza o dos animais e quantifica o do tempo em pastejo e pela desfolha em plantas marcadas. Observou-se maior preferência pelos dosséis em mistura, sendo o tifton 85 o preferido, seguido pelo trevo branco e paspalum. Os eqüinos preferiram as maiores gramíneas e o trevo com maior número de folhas. As regress es da altura dos perfilhos e a profundidade do bocado nas gramíneas n o apresentaram diferen as (P>0,05). Os eqüinos preferem o pastejo em dosséis onde há mistura de gramíneas e leguminosas e as espécies tifton 85 e trevo branco. PALAVRAS-CHAVE: Comportamento de pastejo, estrutura de pastagem, eqüinos, gramíneas, leguminosas, sele o de dieta. Horse preference among four swards was investigated at Federal University of Paraná, on April, 2000. Swards were compounded by Cynodon spp (tifton 85) with Trifolium repens (white clover) and Lotus corniculatus (lotus) in mixture, Paspalum paniculatum (paspalum) in mixture with same legumes, Cynodon spp (tifton 85) with same legumes in side by side strip and Paspalum paniculatum (paspalum) with same legumes in side by side strip. The treatments were allocated in 4 randomized blocks. In each plot, ten plants by species were identified. Height extended of each tiller were measured and legume leaves were counted. Twelve horses (250 kg) were distributed on the blocks and kept during the days of experiment. The preference was evaluated through the largest staying time between the treatments and by grazed tillers. Mixture swards were preferred. The treatments with tifton 85 were preferred, idependent if they were in mixture or strip. Among pure species the preference was the following: tifton 85, white clover, paspalum. The lotus was not preferred. Horses grazed the higher tiller in the grasses and for white clover, plants with more leaves. Measures after grazing in tifton 85 and paspalum showed a linear relationship between t
Ciclagem e balan?o de potássio e produtividade de soja na integra??o lavoura-pecuária sob semeadura direta
Ferreira, Eric Victor de Oliveira;Anghinoni, Ibanor;Andrighetti, Marcelo Hoerbe;Martins, Amanda Posselt;Carvalho, Paulo César de Faccio;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000100015
Abstract: nutrient cycling and balance in integrated crop-livestock systems (icl) are processes that involves soil, plant and animal components, beyond fertilization. animal management, by modifying soil biotic and abiotic conditions, also influences this process as it affects the residue decomposition rate. the objective was to evaluate potassium (k) cycling and balance in an icl system with grazing (black oat and ryegrass) intensities in the winter, followed by soybean cultivated in the summer. the experiment was conducted as of may of 2001 in an area in the state of rio grande do sul - brazil, on a rhodic hapludox (oxisol), under no tillage since 1991. the treatments consisted of continuous bovine grazing intensities at a pasture height of 10, 20, 30 and 40 cm, and a control (no-grazing), in a randomized block design, with three replicates. the forage/soybean cycle of 2007/08 was evaluated in this paper. to calculate k cycling, the contents accumulated in pasture, soybean and animals in one pasture-soybean cycle were considered, and the balance, "in the field" and "in the soil", of k inputs (fertilizer) and outputs (soybean grains and animal tissue) and the k remaining in plant and soil, respectively, were calculated. potassium cycling increased with increasing grazing intensity and the balance, despite negative, with a higher deficit in areas with higher grazing intensity, did not influence soybean yield.
Concentra??o do potássio do solo em sistema de integra??o lavoura-pecuária em plantio direto submetido a intensidades de pastejo
Ferreira, Eric Victor de Oliveira;Anghinoni, Ibanor;Carvalho, Paulo César de Faccio;Costa, Sergio Ely Valad?o Gigante de Andrade;Cao, Eduardo Giacomelli;
Revista Brasileira de Ciência do Solo , 2009, DOI: 10.1590/S0100-06832009000600016
Abstract: potassium (k) dynamics in integrated crop-livestock (icl) systems diverge from other tillage systems, because icl systems are more complex and involve, apart from the cash crop management, the presence of animals. the objective of this study was to evaluate the soil k concentration in an icl system under no-tillage with different grazing (black oat and italian ryegrass) intensities in the winter growing season and soybean cultivated in the summer. the experiment was initiated in may 2001 on the espinilho - farm, in s?o miguel das miss?es, state of rio grosso do sul, brazil, on a rhodic hapludox (oxisol), under no-tillage since 1991. the treatments consisted of different grazing intensities: 10, 20, 30 and 40 cm of pasture height, and a control (no grazing), in a randomized block design, with three replications. available k contents were originally high and remained high during the experiment, independent of the grazing intensity. potassium was stratified in a decreasing gradient from the soil surface in all situations, and was higher after pasture than after soybean. in the control area, in spite of lower k cycling, higher soil k values were found than in the grazed areas, mainly the intensively grazed, due to losses, probably caused by animal manure.
Estrutura da vegeta??o e comportamento ingestivo de novilhos em pastagem natural do Rio Grande do Sul
Thurow, Juliana Muliterno;Nabinger, Carlos;Castilhos, Zélia Maria de Souza;Carvalho, Paulo César de Faccio;Medeiros, Coralia Maria Oliveira;Machado, Mirela Dias;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000500006
Abstract: the experiment was performed in a natural pasture to evaluate the effect of the forage offer level on the pasture structure and ingestive behavior of steers. a completely randomized block design with four daily green forage offer levels (4, 8 12 and 16 kg gfdm/100 kg lw) and two replicates was used. the continuous grazing method with variable stocking rate was used. the increasing forage offer enhanced the higher strata frequency and determined higher inferior strata height. the increasing inferior stratum height decreased the grazing time and increased the ruminating time in the autumn, winter and spring, indicating improvements in the grazing environment. however, in this type of vegetation, the increase in height with increasing forage offer was not adequate to elevate the inferior strata height to the desirable levels so that the daily forage intake could be optimized. increasing forage offer and inferior strata height indicate decreasing linear response of the grazing time and allow a feeding system with shorter time and higher number of meals.
Características de carca?a de cordeiros em pastagem de azevém manejada em diferentes alturas
Carvalho, Paulo César de Faccio;Oliveira, José Otavio Rocha;Pontes, Laíse da Silveira;Silveira, Emanuel Orestes da;Poli, César Henrique Espírito Candal;Rübensam, Jane Maria;Santos, Rogério Jaworski dos;
Pesquisa Agropecuária Brasileira , 2006, DOI: 10.1590/S0100-204X2006000700017
Abstract: the objective of this work was to evaluate the carcass characteristics of lambs maintained on ryegrass (lolium multiflorum lam.) pastures managed with different heights (5, 10, 15 and 20 cm), under continuous variable stocking, from august to november 1999. a randomized block design with three replicates was used. the slaughter weight, hot carcass, fillet, palette and rib weights were different among treatments, and those related to the height 5 cm were lower than the ones of 10, 15 and 20 cm, which were not different among them. there were no differences for hind leg and rib loin. carcass yield ranged from 42.8±0.29 and 44.1±0.32%. all variables showed a quadratic relationship to treatments. the daily liveweight gain determined directly the liveweight at slaughter, the latter being strongly correlated to carcass yield and weight. better yield of lamb carcass cuts were obtained when ryegrass was managed between 12 and 14 cm height.
Soil aggregation in a crop-livestock integration system under no-tillage
Souza, Edicarlos Damacena de;Costa, Sérgio Ely Valad?o Gigante de Andrade;Anghinoni, Ibanor;Carvalho, Paulo César de Faccio;Oliveira, Eric Victor Ferreira de;Martins, Amanda Posselt;Cao, Eduardo;Andrighetti, Marcelo;
Revista Brasileira de Ciência do Solo , 2010, DOI: 10.1590/S0100-06832010000400033
Abstract: grazing intensities can influence soil aggregation, which can be temporarily and permanently affected. the objective of this study was to evaluate the aggregate stability in water at the end of a soybean cycle and during pasture development in a crop-livestock integration system under no-tillage and grazing intensities. the experiment was initiated in 2001, in a dystrophic red latosol, after soybean harvest. treatments consisted of pasture (black oat + italian ryegrass) at heights of 10, 20 and 40 cm, grazed by young cattle, and a control (no grazing), followed by soybean cultivation, in a randomized block design. soil samples were collected at the end of the soybean cycle (may/2007), during animal grazing (september/2007) and at the end of the grazing cycle (november/2007). the grazing period influences aggregate distribution, since in the september sampling (0-5 cm layer), there was a higher proportion of aggregates > 4.76 mm at all grazing intensities. soil aggregation is higher in no-tillage crop-livestock integration systems in grazed than in ungrazed areas.
Ajuste da carga animal em experimentos de pastejo: uma nova proposta
Heringer, Ingrid;Carvalho, Paulo César de Faccio;
Ciência Rural , 2002, DOI: 10.1590/S0103-84782002000400021
Abstract: the variation in available forage mass is frequently observed in grazing experiments, conducted with fixed forage allowance. for better forage mass control, a new method is proposed to adjust stocking rate, based on forage mass and forage allowance, dry matter (dm) accumulation rate, herbage intake rate, and forage susceptible to refusal and lost parameters. this method was used in departamento de zootecnia, ufsm, in a pearl millet grazing experiment with different nitrogen levels (0, 150, 300, 450 and 600kg ha-1), intending to maintain a forage dm mass close to 2500kg ha-1 during the experimental period. the dm accumulation rate was evaluated every 28 days in grazing exclusion cages. the forage susceptible to be refused, evaluated in fixed quadrats, represented 33 to 57% of forage mass, being dependent on nitrogen levels and stocking rate. the used method was efficient in maintaining the intended forage mass, indicating its potential use in experiments aiming better control of the variables involved in plant-animal interface.
Ajuste da carga animal em experimentos de pastejo: uma nova proposta
Heringer Ingrid,Carvalho Paulo César de Faccio
Ciência Rural , 2002,
Abstract: A varia o na massa de forragem disponível é freqüentemente observada em experimentos de pastejo, conduzidos sob uma oferta de forragem fixa. Para um melhor controle da massa de forragem, prop e-se uma nova forma de ajuste da carga animal, baseada nos parametros massa e oferta de forragem, taxa de acúmulo e consumo de matéria seca (MS), e forragem passível de rejei o e perdida. Este método foi utilizado no Departamento de Zootecnia da UFSM, num experimento de pastejo em milheto sob doses de nitrogênio (0, 150, 300, 450 e 600kg ha-1), visando manter uma massa de forragem de 2500kg MS ha-1 durante o período de avalia o. A taxa de acúmulo de MS foi avaliada a cada 28 dias através de gaiolas de exclus o. O material passível de rejei o, medido em quadrados fixos, representou de 33 a 57% da massa de forragem, sendo dependente das doses de nitrogênio e da carga animal. O método utilizado foi eficiente na manuten o da massa de forragem pretendida, indicando a potencialidade do seu uso em experimentos em que se pretende um maior controle das variáveis envolvidas na interface planta-animal.
Atributos químicos do solo em fun??o da aplica??o superficial de calcário em sistema de integra??o lavoura-pecuária submetido a press?es de pastejo em plantio direto
Flores, Jo?o Paulo Cassol;Cassol, Luis César;Anghinoni, Ibanor;Carvalho, Paulo César de Faccio;
Revista Brasileira de Ciência do Solo , 2008, DOI: 10.1590/S0100-06832008000600017
Abstract: the use of large areas occupied only with winter soil cover crops for cattle grazing may become an alternative income source for summer grain producers in southern brazil. the presence of cattle in areas used only with no tillage crops may, however, affect soil attributes, depending on the management type. this study aimed to evaluate the effects of surface liming on the chemical attributes of a red latosol (oxisol) under no-tillage and crop-livestock integration. treatments consisted of pasture management at different heights (10, 20, 30 and 40 cm), in addition to areas without grazing, during the winter. in december 2001, the soil (layers of 0-25, 2.5-5, 5-7,5, 7,5-10, 10-12,5, 12,5-15, 15-17,5, 17,5-20 and 20-25 cm) was evaluated for chemical properties after the first grazing cycle. thereafter, 4.5 mg ha-1 limestone (62 % effective neutralization value) was broadcast and left on soil surface and soybean grown in succession to grazing. soil samples were colleted at the end of the first, second, third, fourth and fifth soybean growing seasons, corresponding to 6, 12, 24, 36, and 48 months after liming. the following variables were evaluated: ph-h2o, smp, exchangeable ca, mg, k and al, and total organic carbon (toc). the surface lime application was effective in correcting the acidity to a depth of 25 cm, depending on the attribute and variable over time. the presence of cattle grazing in the area increased the depth effect of liming. the input of different residues to the soil did not affect the toc levels.
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