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| Registros recuperados: 35 | |
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| Oliveira, Perla Novais de; Universidade Estadual do Sudoeste da Bahia; Matsumoto, Sylvana Naomi; Universidade Estadual do Sudoeste da Bahia; Silva, Daniela Vieira; Universidade Estadual de Santa Cruz; Santos, Jerffson Lucas; Universidade Estadual do Sudoeste da Bahia; D'Arêde, Lucialdo; Universidade Estadual do Sudoeste da Bahia; Viana, Anselmo Eloy Silveira; Universidade Estadual do Sudoeste da Bahia. |
| The purpose of this study was to evaluate the effects of light restriction on the growth of benghal dayflower (Commelina benghalensis). The experiment was conducted in pots under full sunlight and with 18.5, 30, 40, 50, 60 and 70% artificial light restriction treatments. Plant growth was evaluated up to 90 days after planting (DAP), and mathematical models of the major shoot length, internode length, individual area of the first leaf completely expanded, number of leaves and shoot and root dry mass weights were established depending on increasing light restriction levels. The elevation of the light gradient promoted reductions in the number of leaves and fasciculate root dry mass weight. Light restriction did not induce alterations in the plasticity of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.00.00-9 Agronomia Commelina benghalensis; Shading; Growth 5.01.03.06-7 Fisiologia de Plantas Cultivadas. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17388 |
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| Costa, Irton de Jesus Silva; Costa, Bárbara Nogueira Souza; Assis, Franscinely Aparecida de; Martins, Adalvan Daniel; Pio, Leila Aparecida Salles; Pasqual, Moacir. |
| Butia capitata (Mart.) Becc., commonly known as jelly palm, is a palm tree native to the Cerrado biome. It is considered an endangered species owing to intensive extractive exploitation of its fruits, with slow and uneven seminiferous propagation as an aggravating factor. Thereby, there are some bottlenecks related to jelly palm seedling production that needs to be optimized. Light quality and intensity is very important to seedling production, as it controls the metabolism of plants and consequently their growth and development. Thus, the aim of this work is to evaluate the effect of shade nets on the growth and physiological aspects of jelly palm seedlings. The experimental design was completely randomized, with five treatments, ten replicates and eight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shading; Palm tree; Colored nets; Light.; Tropical fruit growing; Propagation; Native plants; Physical numbness.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35332 |
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| Kazama, Ricardo; UEM; Roma, Cláudio Fabrício da Cruz; UEM; Barbosa, Orlando Rus; UEM; Zeoula, Lucia Maria; UEM; Ducatti, Taciana; UEM; Tesolin, Lílian Christiane; UEM. |
| Avaliou-se o efeito do sombreamento sobre a temperatura da superfície do pelame (TSP) de bovinos de cinco grupos genéticos, 4 ½ Limousin + ½ Nelore (L), 8 ½ Limousin + ¼ Nelore + ¼ RedAngus (LR), 4 ½ Limousin + ¼ Nelore + ¼ Simental (LS), 2 ¼ Marchigiana + ¼ Nelore + ¼ Simental (MS) e 4 ¾ RedAngus + ¼ Nelore + ¼ Guzerá (RG), com 20 meses de idade e peso médio de 300 kg, alojados em baias individuais de 10 m2 , sendo metade coberta com telhas de zinco. A dieta era isoproteica e isoenergética com relação volumoso:concentrado 67:33. A TSP do Lado 1 (L1) do confinamento, durante o dia, não diferenciou (p > 0,05) entre os grupos genéticos, enquanto... |
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Palavras-chave: 5.04.05.00-4 Produção Animal grupo genético; Orientação da instalação; Radiação; Sombra. genetic group; Building orientation; Radiation; Shading. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4702 |
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| Silva, Érica Carla Lopes da; UFRPE; Modesto, Elisa Cristina; UFRPE; Azevedo, Marcílio de; UFRPE; Ferreira, Marcelo de Andrade; UFRPE; Dubeux Junior, José Carlos Batista; UFRPE; Schuler, Alexandre Ricardo Pereira; UFPE. |
| O trabalho teve como objetivo avaliar a produção, composição e o perfil de ácidos graxos do leite, parâmetros fisiológicos e atividades comportamentais de vacas da raça Pitangueiras, submetidas à condição de pastejo com e sem acesso à sombra. O ambiente foi monitorado diariamente em uma estação meteorológica. O delineamento experimental foi o inteiramente casualizado, sendo que 20 vacas em lactação foram divididas em piquetes nos tratamentos com e sem acesso à sombra. Não houve diferença (p > 0,05) entre os tratamentos quanto às variáveis fisiológicas, produção, composição e perfil de ácidos graxos do leite. Os animais com acesso à sombra buscaram o sombrite nos horários em que os índices de conforto térmico foram mais elevados. No turno da tarde os... |
| Tipo: Pesquisa de campo;análise laboratorial |
Palavras-chave: Ácidos graxos; Comportamento; Estresse térmico; Fatores ambientais; Temperatura retal ciências agrárias acids fatty; Behavior; Environment; Heat stress; Shading; Dairy cows. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/5279 |
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| Rodrigues, Cynara Oliveira Diniz; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Araújo, Saulo Alberto do Carmo; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Viana, Maria Celuta Machado; Empresa de Pesquisa Agropecuária de Minas Gerais; Rocha, Norberto Silva; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Braz, Thiago Gomes dos Santos; Universidade Federal dos Vales do Jequitinhonha e Mucuri; Villela, Severino Delmar Junqueira; Universidade Federal dos Vales do Jequitinhonha e Mucuri. |
| The aim was to evaluate the influence of different spatial arrangements of trees [(3×2)×20 m, (2×2)×9 m and 2×9 m] and sampling sites (center of row spacing and side of tree rows) with regard to the amount and quality of light in the understory of silvopastoral systems and their effects on the production and chemical composition of pasture. The experimental design was a randomized block in a split plot, with three replications. The sampling site affected absolute irradiance, photosynthetic active radiation (PAR), light interception (LI) and red/far red ratio, with higher rates in the center of spacing. There were high and positive correlations between LI/leaf area index (LAI), LI/dry mater (DM) and LAI/DM in the center and LI/LAI and FAR/DM in the side of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pastagem e Forragicultura quality of light; Shading; Spatial arrangements; Urochloa decumbens. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/22398 |
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| Brito, Selma Freire de; Pinheiro, Charles Lobo; Nogueira, Francisco Carlos Barboza; Medeiros Filho, Sebastião; Matos, Dalva Maria da Silva. |
| The invasion by Cryptostegia madagascariensis causes economic and environmental problems in Northeastern Brazil. Current study evaluates the initial growth of C. madagascariensis on light gradient. The experiment used 0, 30, 50 and 70% shading treatments arranged in a completely randomized design and evaluated in four periods, namely, 35, 50, 65 and 80 days. Height, absolute growth rate, relative growth rate, number of side branches, number of leaves, leaf area, specific leaf area, leaf area ratio, root mass ratio, stem mass ratio, leaf mass ratio and leaf area/root mass ratio were evaluated. Results showed that the height was greater in shade environments, and the greater the available light, the greater was the number of side branches. C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Functional traits; Caatinga; Shading; Morphological adjustments; Biomass. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28179 |
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| SANTOS,LEONARDO D.T.; CRUZ,LEANDRO R. DA; SANTOS,SAMUEL A. DOS; SANT'ANNA-SANTOS,BRUNO F.; SANTOS,IZABELA T. DOS; OLIVEIRA,ARIANE M. DE; BARROS,RODRIGO E.; SANTOS,MÁRCIA V.; FARIA,RODRIGO M.. |
| Plants have the ability to undergo morphophysiological changes based on availability of light. The present study evaluated biomass accumulation, leaf morphoanatomy and physiology of Neonotonia wightii andPueraria phaseoloides grown in full sunlight, as well as in 30% and 50% shade. Two assays were performed, one for each species, using a randomized block design with 10 replicates. A higher accumulation of fresh mass in the shoot of the plants was observed for both species under cultivation in 50% shade, while no differences were detected between the full sunlight and 30% shade. N. wightii and P. phaseoloides showed increase in area and reduction in thickness leaf when cultivated in 50% shade. There were no changes in photosynthetic rate, stomatal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptation; Fabaceae; Morphophysiology; Shading. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100519 |
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| SCALON,SILVANA P.Q.; MOTA,LEANDRO H.S.; MUSSURY,ROSILDA M.. |
| The present work aimed to evaluate the osmotic conditioning and shading on the germination and on the initial growth of aroeira seedlings. The seeds were pre-imbibed in solutions with different concentrations of PEG (polyethylene glycol) and KNO3 and incubated at 10°C and 20°C temperatures, during 0 (control), 12 and 24 hours. After these periods, the seeds were dried until they reached the initial levels of humidity. After that, they were put for germinating in BOD (Biochemical Oxygen Demand) chambers, at alternated 20-30°C. The control treatment and the pre-conditionings that presented the best results in BOD germination were selected, PEG (-1.0 MPa) + KNO3 (-1.0 MPa) and KNO3 (-1.0 MPa), with pre-imbibition for 12 h and incubated in BOD at 20°C. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aroeira; Anacardiaceae; Cerrado; Shading; PEG 6000 and KNO3. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200799 |
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| Morais,Heverly; Medri,Moacyr Eurípedes; Marur,Celso Jamil; Caramori,Paulo Henrique; Ribeiro,Ana Maria de Arruda; Gomes,José Carlos. |
| Modifications on leaf anatomy in Coffea arabica shaded with pigeonpea (Cajanus cajan), compared to cultivation under full sun, were assessed. The leaves fully exposed to sunlight presented thicker cuticles and cellular walls, narrower epidermis cells, palisade parenchyma with longer cells, thicker lacunar parenchyma, fewer intercellular spaces and a larger stomata number. Leaves under dense shade presented a narrower cuticle and cellular wall; a mesophyll with smaller volume, but with larger intercellular spaces; and epidermis with thicker cells and a smaller stomata amount, surrounded by subsidiary cells of smaller dimensions. Plants grown under full sunlight presented higher values of net photosynthesis. The results evidenced that the species C. arabica... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffee; Shading; Morphology; Physiology; Agroforestry. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600005 |
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| DaMatta,Fábio M.; Ronchi,Cláudio P.; Maestri,Moacyr; Barros,Raimundo S.. |
| After oil, coffee is the most valuable traded commodity worldwide. In this review we highlighted some aspects of coffee growth and development in addition to focusing our attention on recent advances on the (eco)physiology of production in both Coffea arabica and C. canephora, which together account for 99% of the world coffee bean production. This review is organized into sections dealing with (i) climatic factors and environmental requirements, (ii) root and shoot growth, (iii) blossoming synchronisation, fruiting and cup quality, (iv) competition between vegetative and reproductive growth and branch die-back, (v) photosynthesis and crop yield, (vi) physiological components of crop yield, (vii) shading and agroforestry systems, and (viii) high-density... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arabica conilon and robusta coffee beverage quality density planting die-back flowering photosynthesis; Shading. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000400014 |
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| Raai,Murthazar Naim; Zain,Nurul Amalina Mohd; Osman,Normaniza; Rejab,Nur Ardiyana; Sahruzaini,Nurul Amylia; Cheng,Acga. |
| ABSTRACT: An experiment was conducted to investigate the effects of different shading regimes [i.e., 60% (heavy), 30% (moderate), and 0% (control)] on 25 traits associated with the morphological features, photosynthetic gas exchange and agronomic characteristics of winged bean (Psophocarpus tetragonolobus), an underutilized protein-rich legume from the tropics. Collectively, 80% of the studied variables displayed significant differences (P<0.05) between at least two shade treatments. Shading generally showed most pronounced effect on the physiological traits of the legume, whereby the stomatal conductance, photosynthetic and transpiration rate differed significantly among plants for all treatments. The non-shaded plants were observed to have superior... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morphology; Physiology; Shading; Winged bean; Yield. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200202 |
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| Lopes,Clenardo Macedo; Paciullo,Domingos Sávio Campos; Araújo,Saulo Alberto do Carmo; Morenz,Mirton José Frota; Gomide,Carlos Augusto de Miranda; Maurício,Rogério Martins; Braz,Thiago Gomes dos Santos. |
| ABSTRACT: The silvopastoral system has been suggested as an alternative to recover degraded pastures in tropical regions. However, trees reduce the light available for pastures, which may affect the growth and herbage accumulation. The objective of this study was to evaluate the morphogenesis, canopy structure and herbage accumulation of signalgrass ( Brachiaria decumbens ) subjected to three light regimes (0, 20 and 70% of natural shading) and two fertilization levels (presence or absence of nitrogen, phosphorus and potassium). Leaf and stem elongation rates increased under shading but did not vary with fertilization. The leaf appearance rate was greater under fertilizer treatment but was generally similar among light regimes. The tiller density was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria decumbens; Morphogenesis; Shading; Silvopastoral system; Tiller density. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200403 |
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| Registros recuperados: 35 | |
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