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	Provedor de dados PAB (1) Autor Fontes,Eliana Maria Gouveia (1) Mata,Renata Alves da (1) Paula,Débora Pires (1) Pimenta,Mayra (1) Pires,Carmen Silvia Soares (1) Souza,Lucas Machado de (1) Sujii,Edison Ryoiti (1) Mais... Palavra-chave Alternative food (1) Anthonomus grandis (1) Cotton bolls (1) Gossypium hirsutum (1) Tipo do documento Info:eu-repo/semantics/article (1) Ano 2017 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 169 Primeira ... 1 2 3 4 5 6 7 8 9 ... Última Whole or ground millet grain provided in two supplementation frequencies for grazing beef cattle: nutritional parameters R. Bras. Zootec. Benatti,João Marcos Beltrame; Moraes,Eduardo Henrique Bevitori Kling de; Zervoudakis,Joanis Tilemahos; Araújo,Cláudio Vieira de; Cabral,Luciano da Silva; Rufino Junior,João; Carvalho,Daniel Marino Guedes de; Oliveira,André Alves de. The objective of this study was to evaluate the processing of millet grain provided at two supplementation frequencies for grazing beef cattle during the dry season on nutritional parameters. Five rumen-cannulated crossbred steers, with 24 to 26 months of age and average body weight of 428.6±26.06 kg, were assigned to a Latin square design (5 × 5) in a 2 × 2 + 1 factorial arrangement, as follows: two forms of millet grain (whole grains - or ground; WG - GG), two strategies of concentrate supplementation (daily distribution - 7X; or three times a week - 3X) and a control treatment (mineral mixture - MM). Animals were kept in five paddocks of 0.24 ha each with Marandu grass pastures. Concentrate supplements were supplied at 2.00 and 4.66 kg/animal/day for... Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Frequency; Intake; Pasture. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000500250 Energy sources and supplementation levels for beef heifers raised during the dry season R. Bras. Zootec. Couto,Victor Rezende Moreira; Paulino,Mário Fonseca; Detmann,Edenio; Valadares Filho,Sebastião de Campos; Sales,Maykel Franklin Lima; Barros,Lívia Vieira de; Porto,Marlos Oliveira; Valente,Ériton Egidio Lisboa. This experiment aimed at evaluating the productive performance, intake and the apparent digestibility in the raising of beef heifers on Brachiaria decumbens Stapf. pastures under supplementation with starch or fibrous energy sources during the dry season. It was used 40 newly weaned heifers (20 Nellore and 20 crossbreed), at 8.5 months of age and 197.9 ± 3.74 kg initial weight. Two supplements were formulated: the first was corn meal- and soybean meal-based diet (high in starch) and the second was based on wheat meal (high in fiber), which were given at the quantities of 0.5 or 1.0 kg/animal/day, compared to the offer of only mineral mixture (control). The animals were distributed according to a complete randomized block design in a 2 × 2 + 1 factorial... Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria decumbens; Heifers; Pasture; Wheat meal. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001100024 Dry matter production and nitrogen use efficiency of giant missionary grass in response to pig slurry application R. Bras. Zootec. Miranda,Mario; Scheffer-Basso,Simone Meredith; Escosteguy,Pedro Alexandre Varella; Lajús,Cristiano Reschke; Scherer,Eloi Erhard; Denardin,Rosiane Berenice Nicoloso. This study assessed the effect of successive applications of pig slurry on the dry matter (DM) production and the nitrogen use efficiency of giant missionary grass along two years. A total of 55, 110, 165, 220 and 275 m³ of pig slurry/ha/year were applied in order to supply 100, 200, 300, 400 and 500 kg of total N/ha/year, respectively. These treatments were compared with the ammonium nitrate (200 kg of N/ha/year) source of N and with a control (no nitrogen application). Annually, nitrogen was applied in four divided doses, after the cutting of forage grasses, which takes place five times a year. The total DM yield did not differ between years and increased linearly as a function of pig slurry application, ranging from 2,698 kg of DM/ha/year (control) to... Tipo: Info:eu-repo/semantics/article Palavras-chave: A. jesuiticus × A. scoparius; Organic fertilization; Pasture. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300009 Improving grassland profitability in the Mid-continental USA by breeding for improved forage digestibility: lessons learned and applications to South American grasslands R. Bras. Zootec. Vogel,Kenneth Paul; Miranda,Cesar Heraclides Behling. In the early 1970's research was initiated by the cooperative USDA-ARS and University of Nebraska grass breeding program to develop perennial grasses adapted to the mid-continental USA with improved forage quality. The initial breeding and animal evaluation work focused on switchgrass (Panicum virgatum) but has since expanded to several other warm-and cool-season perennial grasses. The in vitro dry matter digestibility (IVDMD) test was selected as the measure of forage quality that was used in the breeding work because of its previous successful application on improving bermudagrass (Cynodon dactylon). In all of the grass species that we have studied to date, there is genetic variability for IVDMD and forage yield. IVDMD is a heritable trait with narrow... Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Economics; Forage; Grasses; Pasture; Quality. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001300017 Retinol and mineral status in grazing foals during the dry season R. Bras. Zootec. Costa,Maria Lindomárcia Leonardo da; Rezende,Adalgiza Souza Carneiro de; Sampaio,Ivan Barbosa Machado; Silva,Vinícius Pimentel; Santiago,Juliano Martins; Ferraz,Vany Perpétua; Saliba,Eloísa de Oliveira Simões; Lana,Ângela Maria Quintão. ABSTRACT The objective of this study was to examine serum retinol and some mineral (zinc, iron, calcium, phosphorus, magnesium, and copper) levels in seven Mangalarga Marchador colts aged 329.48 days, reared on pasture in the city of Montes Claros, MG, Brazil, during the dry season. Equines were evaluated for four periods of 45 days during the total study period of five months. The foals had access to Panicum maximum cv. Tanzania pasture, while water and mineral salt lick were provided ad libitum. Blood samples were taken to determine serum retinol and levels of minerals, along with pasture samples to quantify beta-carotene in the grass. The results indicated that retinol levels varied (2.87 to 1.97 µg/dL) and remained below the standard levels. The levels... Tipo: Info:eu-repo/semantics/article Palavras-chave: Equine; Vitamin A; Pasture. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200118 Feeding systems and tocopherol level in the diet and their effects on the quality of lamb meat: a meta-analysis R. Bras. Zootec. Hampel,Viviane da Silva; Poli,Cesar Henrique Espírito Candal; Devincenzi,Thais; Pötter,Luciana. ABSTRACT The objective of the present study was to evaluate, through a meta-analysis, the effects of feeding systems and tocopherol levels found in the diet of lambs on qualitative characteristics of their meat. A search of the computerised literature in Science Direct databases, PubMed, Scopus, and SciELO virtual library was carried out to select works that evaluated the quality of lamb meat. As a first requirement for inclusion in the meta-analysis, articles were selected with the keywords “tocopherol”, “meat”, and “lamb”. The variables extracted from the articles were classified according to the type of feeding system and tocopherol level in the diet of lambs. Production systems alter the qualitative characteristics of meat. Lambs raised exclusively on... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant; Concentrated; Omega 3; Oxidative stress; Pasture. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100711 Canopy structure and forage nutritive value of elephantgrass subjected to different stocking rate and N fertilization in the “Mata Seca” ecoregion of Pernambuco R. Bras. Zootec. Dourado,Diego Loiola; Dubeux Junior,José Carlos Batista; Mello,Alexandre Carneiro Leão de; Santos,Mércia Virginia Ferreira dos; Lira,Mário de Andrade; Freitas,Erinaldo Viana de; Apolinário,Valéria Xavier de Oliveira; Santos,Erick Rodrigo da Silva. ABSTRACT The objective was to evaluate the effect of three stocking rates (2, 3.9, and 5.8 animal units ha−1) and three fertilization levels (0, 150, and 300 kg N ha−1 yr−1) on herbage mass and nutritive value of elephantgrass (Pennisetum purpureum Schum.) cv. IRI-381. The experiment was conducted from May to August of 2009 and 2010 in Itambé, PE, Brazil, during the rainy season. Treatments were allocated in a split-plot arrangement in a completely randomized block design. The variables measured included leaf mass (pre- and post-grazing), botanical composition, soil cover, leaf area index, light interception, leaf angle, and concentrations of dry matter, organic matter, N, and in vitro digestible dry matter. When fertilized with 300 kg N ha−1 yr−1, leaf... Tipo: Info:eu-repo/semantics/article Palavras-chave: Grazing; Livestock; Nitrogen; Pasture; Pennisetum purpureum. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100400 Milk quality of Jersey cows kept on winter pasture supplemented or not with concentrate R. Bras. Zootec. Gonzalez,Helenice de Lima; Velho,Ione Maria Pereira Haygert; Silva,Marcelo Abreu da; Medeiros,Renato Borges de; Paim,Nilton Rodrigues; Nörnberg,José Laerte. This study was carried out to evaluate the effect of the use of supplementation in pasture cultivated with Avena strigosa (black oats), Lolium multiflorum (ryegrass) and Vicia sativa L. (common vetch) on the composition and somatic cells count (SCC) of Jersey cow milk. Eight cows of the Jersey breed were separated by milk production, lactation period and live weight and were randomly blocked into two homogeneous groups (one with supplementation and other only on pasture), in a randomized complete design. Both groups were allowed to pasture for about 7 hours per day in a rotational grazing system in strips, with a one-day occupation period. The supplemented group was fed daily with 8 kg of supplement made of soy bean meal, soy shells, calcium limestone and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk composition; Pasture; Somatic cells count. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001000018 Body composition and net protein and energy requirements for weight gain of crossbred dairy cattle in grazing R. Bras. Zootec. Andrade,Dulciene Karla Bezerra de; Véras,Antonia Sherlânea Chaves; Ferreira,Marcelo de Andrade; Santos,Mércia Virginia Ferreira dos; Melo,Wellington Samay de; Pereira,Kedes Paulo. The body composition and net protein and energy requirements for weight gain of 5/8 Hostein-Zebu crossbred cattle raised in Brachiaria decumbens Spaft pasture were evaluated. In total, 16 bulls with 10 months of age and body weight (BW) of 180 ± 19.95 kg were used. The animals were kept with free access to pasture or with restricted grazing (from 6 to 10 h). Four animals were slaughtered at the beginning of the experimental period to estimate the empty body weight (EBW) and the initial body composition of the remaining animals. The other animals were slaughtered at the end of the 84-day trial period. The logarithm equations of the protein and energy body content were adjusted according to the logarithm of the empty body weight EBW. From these equations,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Nutritional requirements; Crossbred dairy; Pasture. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000400022 Body composition and net and dietary macrominerals requirements of Nellore steers under grazing R. Bras. Zootec. Almeida,Vitor Visintin Silva de; Queiroz,Augusto César de; Silva,Robério Rodrigues; Silva,Fabiano Ferreira da; Oliveira,Aline Cardoso; Santana Júnior,Hermógenes Almeida de. This experiment was carried out with the objective of determining the macrominerals (Ca, P, Mg, K and Na) requirements of Nellore steers under grazing. Twenty four Nellore steers (371 ± 14 kg of BW and 26 mo old) were used. Four steers were slaughtered at the beginning of the experiment (reference group), serving as a reference in subsequent study. The remaining 20 animals were weighed and distributed into a completely randomized design with four supplementation levels offer: 0.0 (mineral mixture - control), 0.3, 0.6 and 0.9% of BW, with five replications. The supplements, based on ground corn, soybean meal and/or urea, were previously balanced to achieve an average daily gain of 350, 650 and 850g, respectively, for the different supplementation levels... Tipo: Info:eu-repo/semantics/article Palavras-chave: Macrominerals; Pasture; Requirements; Zebu cattle. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000600016 Macro mineral requirements by grazing zebu bovines R. Bras. Zootec. Moraes,Eduardo Henrique Bevitori Kling de; Paulino,Mário Fonseca; Moraes,Kamila Andreatta Kling de; Valadares Filho,Sebastião de Campos; Lazzarini,Isis; Monnerat,João Paulo Ismério dos Santos; Couto,Victor Rezende Moreira; Souza,Marcos Gonçalves de. The objective of this study was to determine requirements of calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K) and sodium (Na) for grazing zebu bovines. The experiment area was composed of Brachiaria decumbens paddocks. Twenty-seven non-castrated animals, with initial live weight of 311.0 kg and at an average age of 14 months were used. Three animals were slaughtered, after adaptation period, so they were used as control for estimates of empty body weight and initial body composition of animals in the experiment. Out of the 24 remaining animals, four were sent to the maintenance group with restrict grazing time to limit energy intake close to the maintenance level. The other 20 animals were distributed in four treatments: mineral mixture,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Macro minerals; Pasture; Requirement; Zebu cattle. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200023 Comparison of extensive and intensive pig production systems in Uruguay in terms of ethologic, physiologic and meat quality parameters R. Bras. Zootec. Blumetto Velazco,Oscar Ricardo; Calvet Sanz,Salvador; Estellés Barber,Fernando; Villagrá García,Arantxa. The objective of this work is to characterize two contrasting systems of fattening pigs in Uruguay. A total of 96 pigs (average 41.7 kg) were divided into eight groups of 12 animals, representing two production systems: (IN) pigs confined in pens of 12 m² or (OUT) kept in plots with field shelters and access to pasture. Behavioral observations were performed by scan sampling at 5-minute intervals, three times a day during weeks 6, 8, 10 and 12 of the experiment. Aggressions were also observed at the end of the experimental period. Blood samples were taken for cortisol analysis and other physiological parameters, during growth period and slaughter and meat quality characteristics were assessed after slaughter. Differences were found in carcass... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggressions; Behaviour; Housed pig; Outdoor pig; Pasture. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000700009 Homeopathic additives and virginiamycin® in grazing beef cattle Rev. Ciênc. Agron. Lima,Josilaine Aparecida da Costa; Fernandes,Henrique Jorge; Silva,Aline Gomes da; Rosa,Edneia Pereira; Falcão,Yasmin dos Santos. ABSTRACT The aim of this study was to evaluate the effects of homeopathic additives and the non-ionophore antibiotic virginiamicin® on intake, digestibility, metabolic characteristics and carcase characteristics in Nellore bulls under supplemented grazing. Twelve uncastrated Nellore bulls were used, with an initial mean weight of 346.04 ± 13.33 kg and initial age of 20.00 ± 2.00 months. The animals were kept in individual paddocks of Urochloa decumbens Stapf. (syn. Brachiaria) and divided into two treatments: Lipomax® - supplement concentrate with homeopathic additives (Convert H®, Sodo 100®, Figotonus®) and a non-ionophore antibiotic (Virginiamycin®); Control - supplement concentrate containing the same protein content, but with no additives. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antibiotic; Nellore; Pasture; Supplement. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000200406 Chemical composition of Panicum maximum ‘BRS Zuri’ subjected to levels of salinity and irrigation depths Rev. Ciênc. Agron. Silva,Eranildo Brasil da; Carneiro,Maria Socorro de Souza; Furtado,Rafael Nogueira; Lopes,Marcos Neves; Braga,Marilena de Melo. ABSTRACT The study of cultivars with moderate flood tolerance is essential to their use in pastures irrigated with saline water. The aim of this study was to evaluate the chemical composition of Panicum maximum ‘BRS Zuri’ under the effect of different irrigation depths and levels of salinity. A randomised block design of split plots was used with five replications per treatment. The treatments resulted from the combination of three levels of water salinity (S1 = 0.6, S2 = 1.8 and S3 = 3.0 dS m-1) and four levels of irrigation (I1 = 60%, I2 = 80%, I3 = 100% and I4 = 120% of the evapotranspiration). The chemical composition of the grass, Panicum maximum ‘BRS Zuri’, cut at 28 days, was evaluated over two cycles. There was an interaction between the factors... Tipo: Info:eu-repo/semantics/article Palavras-chave: Saline water; Water stress; Dry matter; Pasture. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100416 ZINC IN THE NUTRITION AND YIELD OF GRASS-MEGATHYRSUS CULTIVATED IN OXISOL DYSTROPHIC Sci. Agrar.Paran. / SAP Vale, Diego wyllyam do; Prado, Renato de Mello; Santana, Jaiciclênia da Silva; Avalhães, Cíntia Carla; Fonseca, Ivana Machado. The zinc (Zn) application of adequate form favors the growth of the plants, however, in high rates can diminish the yield of the pasture. Thus, it was objectified to evaluate the effect of the Zn application in the nutrition, growth and production of grass Panicum maximum cv. Megathyrsus, was realized  an experiment in conditions of house of vegetation with six rates of Zn: 0; 15; 30; 60; 120 and 360 mg dm-3, made use in fully randomized, with four repetitions. To the 45 and 75 days after the emergency of plants evaluated it height, the number of leaf, the number of tillers, the mass of dry substance of aerial part, the concentration of Zn in the soil, the content and accumulation of Zn in the plant. The zinc application increased its concentration in the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Panicum maximum; Pasture; Grassy; Toxicity; Growth. Ano: 2012 URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/4739 Etiological and epidemiological study of the bovine paraplegic disease MV&Z Carciofi, Aulus Cavalieri; Marques, Luís Carlos; Prada, Flávio; Schocken-Iturrino, Ruben Pablo; Alessi, Antônio Carlos. Objective: To investigate etiology and epidemiological scenario of the "bovine paraplegic disease" in bovines served at the Hospital Veterinário "Governador Laudo Natel" (Veterinarian Hospital "Governar Laudo Natel") of "Faculdade de Ciências Agrárias e Veterinárias da Universidade do Estadual Paulista" (College of Agrarian and Veterinary Sciences of the Paulista State University) (FCAV/UNESP), Campus of Jaboticabal, Jaboticabal, SP, Brazil. Material and Method: Clinical examination, neurological assessment, collection of blood serum and rumen liquid were carried out for detection of botulinal toxin, cephalorhachidian for the diagnosis of encephalitis, necroscopic test, histopathologic brain test and rabies diagnosis. Handling, type of zootechnical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Botulism. Clostridium botulinum. Bacterial toxins; Paraplegia epidemiology; Paraplegia etiology; Pasture; Brachiaria; Beef cattle Botulismo; Clostridium botulinum; Toxina botulínica tipo A; Paraplejia epidemiología; Paraplejia etiología; Pastizales; Brachiaria; Ganado de corte botulismo; Clostridium botulinum; Toxina botulínica tipo A; Paraplegia; Epidemiologia; Paraplegia; Etiologia; Pastagens; Brachiaria; Bovinos de corte. Ano: 2003 URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3244 NITROGEN SOIL BUDGETS IN CONTRASTING DAIRY GRAZING SYSTEMS OF SOUTHERN CHILE, A SHORT-TERM STUDY R.C. Suelo Nutr. Veg. Núñez,R.P; Demanet,R; Alfaro,M; Mora,M.L. In recent years, the intensification of livestock production in Southern Chile has resulted in a high potential for environmental damage through nitrogen (N) losses, creating the need for the evaluation of N flows from these systems. The aim of the research was to determine N budgets and N use efficiency in two grazing systems in Southern Chile. For this, inputs and outputs were measured during one year on two grazing systems (heavy grazing, HG; and light grazing, LG). Also, a control treatment with no grazing (C) was considered. The annual N soil budget was determined by the difference between all N inputs (£ inputs) and all N outputs (X outputs). The results of the experiment indicate that HG treatments received the biggest N input (427, 359 and 288 kg N... Tipo: Journal article Palavras-chave: Nitrogen budgets; Grazing; Nitrogen use efficiency; Nitrogen losses; Pasture. Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000200008 MOVEMENT OF N0(3)-N AND NH4-N IN AN ANDISOL AND ITS INFLUENCE ON RYEGRASS PRODUCTION IN A SHORT TERM STUDY R.C. Suelo Nutr. Veg. Mora,María de la Luz; Cartes,Paula; Núñez,Pedro; Salazar,Mauricio; Demanet,Rolando. In acids soils, the use of ammonium fertilizers accelerates the acidification processes and decreases both the production and persistence of the pastures. Nitrogen (N) is the most limiting factor for plant growth in most agricultural systems, but also it is one of the major environmental issues worldwide. In Chile, neither systematic studies in the first period of pasture growth and nor N leaching losses associated have been reported. The aims of this study were: (i) to evaluate the effect of the N sources at increasing rates of application on the yield and quality of ryegrass (Lolium perenne) and (ii) to quantify in the short-term the N potential leaching losses and the pH changes throughout the soil profile under field conditions. A field experiment was... Tipo: Journal article Palavras-chave: Ammonium; Leaching; Nitrate; Nitrogen; Pasture. Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912007000200005 Carbonate-silicate ratio for soil correction and influence on nutrition, biomass production and quality of palisade grass Scientia Agricola Souza,Renato Ferreira de; Ávila,Fabrício William; Faquin,Valdemar; Pozza,Adélia Aziz Alexandre; Carvalho,Janice Guedes; Evangelista,Antônio Ricardo. Silicates can be used as soil correctives, with the advantage of being a source of silicon, a beneficial element to the grasses. However, high concentrations of silicon in the plant would affect the digestibility of the forage. To evaluate the influence of the substitution of the calcium carbonate by calcium silicate on the nutrition, biomass production and the feed quality of the palisade grass [Urochloa brizantha (C. Hochstetter ex A. Rich.) R. Webster], three greenhouse experiments were conducted in completely randomized designs with four replications. Experimental units (pots) contained a clayey dystrophic Rhodic Haplustox, a sandy clay loam dystrophic Typic Haplustox and a sandy loam dystrophic Typic Haplustox. Each soil received substitution... Tipo: Info:eu-repo/semantics/article Palavras-chave: Urochloa brizantha; Pasture; Lime; Silicon; Feed value. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500003 Photosynthetic light response of the C4 grasses Brachiaria brizantha and B. humidicola under shade Scientia Agricola Dias-Filho,Moacyr Bernardino. Forage grasses in tropical pastures can be subjected to considerable diurnal and seasonal reductions in available light. To evaluate the physiological behavior of the tropical forage grasses Brachiaria brizantha cv. Marandu and B. humidicola to low light, the photosynthetic light response and chlorophyll contents of these species were compared for plants grown outdoors, on natural soil, in pots, in full sunlight and those shaded to 30 % of full sunlight, over a 30-day period. Both species showed the ability to adjust their photosynthetic behavior in response to shade. Photosynthetic capacity and light compensation point were lower for shade plants of both species, while apparent quantum yield was unaffected by the light regime. Dark respiration and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon assimilation; Chlorophyll content; Light compensation point; Pasture. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000100009 Registros recuperados: 169 Primeira ... 1 2 3 4 5 6 7 8 9 ... Última

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