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| Registros recuperados: 36 | |
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| Pimentel,Márcio Sampaio; De-Polli,Helvécio; Aquino,Adriana Maria de; Correia,Maria Elizabeth Fernandes; Rouws,Janaina Ribeiro Costa. |
| The objective of this work was to assess the effect of different coffee organic cultivation systems on chemical and biological soil characteristics, in different seasons of the year. The following systems were evaluated: coffee intercropped with one (CJ1), two (CJ2) or three (CJ3) pigeon pea (Cajanus cajan) alleys; coffee planted under full sun (CS); area planted with sweet pepper and snap bean in a conventional tillage system (AC); and secondary forest area (FFR). Row spacing in CJ1, CJ2, CJ3 and CS was 2.0x1.0, 2.8x1.0, 3.6x1.0, and 2.8x1.0 m, respectively. Soil samples were collected at 10-cm depth, during the four seasons of the year. The results were subjected to analysis of variance, principal component analysis, and redundancy analysis. There was an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cajanus cajan; Coffea arabica; Edaphic macrofauna; Metabolic quotient; Shading; Soil microbial biomass. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000500013 |
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| FELFILI,JEANINE MARIA; HILGBERT,LUÍS FERNANDO; FRANCO,AUGUSTO CÉSAR; SOUSA-SILVA,JOSÉ CARLOS; RESENDE,ALBA VALÉRIA; NOGUEIRA,MARIA VALDENETE PEREIRA. |
| As perturbações por desmatamentos, queimadas e mineração nas matas de galeria estão se avolumando em função do desenvolvimento econômico, gerando desequilíbrio ecológico e tornando necessários estudos que possibilitem a recuperação deste ecossistema. O objetivo deste trabalho foi o de avaliar, em viveiro, a resposta da espécie Sclerolobium paniculatum submetida a quatro níveis de sombreamento. O delineamento experimental foi inteiramente casualizado, com quatro tratamentos e quinze repetições. Cada tratamento representou uma fase da sucessão em floresta natural: pleno sol, simulando uma condição de área degradada; condição de clareira, com aproximadamente 50% de sombreamento; dossel da mata, em fase de fechamento, com sombreamento médio de 70%; dossel... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gallery forests; Light; Shading; Brazil. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500011 |
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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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| 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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| BARBOSA,ANDRÉA RODRIGUES; YAMAMOTO,KIKYO; VALIO,IVANY F. M.. |
| Vochysia tucanorum Mart. (Vochysiaceae) is a very widely distributed species in the cerrado and forests in Brazil, from the State of Bahia to Paraná. Its seed germination was analysed under eight treatments using different conditions of light and temperature. Up to 73 days, at least ca. 93% of the seeds germinated in all treatments, except under alternating temperatures of 35°/10°C (62%). Light enhanced germination, except under constant temperature of 25°C when seeds are not photoblastic. At this temperature, the highest percentage of germination was found. Initial vegetative growth was analysed by comparing the effects of shading, by means of different percentages of full daylight (100%, 45%, 10.6%, 4.8%), and soils from cerrado and forest. During 123... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Germination; Seedling growth; Shading; Vochysia tucanorum; Soil; Cerrado. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000500008 |
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| Wu,Yueyan; Qiu,Tian; Shen,ZiLi; Wu,Yanyan; Lu,Dan; He,Jingwen. |
| Abstract Shading is a practical measure to reduce the heat stress to grape trees in the summer. However, inappropriate shading will cause the reduction in leaf photosynthesis and consequently the retardation of growth for the plants or the loss of fruit yield and quality for the mature grape trees. In this study we have used 1-year-old ‘YinHong’ grape plants growing under different levels of shading, ranging from full sunlight 0% to 80% reduction, to investigate their growth, physiological and biochemical responses. The results show that shading rate =45% did not significantly affect grape growth. Shading over 45% reduction of the full sunlight, the growth of the grape plants were started to be inhibited. In addition, soluble protein content, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grape; Growth characteristics; Shading. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452018000500201 |
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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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| FERREIRA, F. I. G.; MESQUITA, A. L. M.; MOTA, M. do S. C. de S.; FUCK JUNIOR, S. C. de F.; MIRANDA, F. R. de. |
| A traça-da-castanha (Anacampsis phytomiella) é a praga mais importante do período de frutificação do cajueiro porque ataca o fruto (castanha), causando elevados prejuízos por destruir completamente a amêndoa da castanha de caju. O principal sintoma de ataque é a presença de um furo localizado na parte distal da castanha e é conhecido pelo produtor como castanha furada. O adulto é uma pequena mariposa de hábito noturno, com cerca de 1,5 cm de envergadura, coloração escura, com pequenas manchas claras nas asas. O objetivo deste trabalho foi investigar a infestação da traça-da-castanha nos clones de cajueiro-anão CCP 76, BRS 226, BRS 189, cultivados em consorciação com as fruteiras, banana, mamão e melancia, no Campo Experimental da Embrapa Agroindústria... |
| Tipo: Parte de livro |
Palavras-chave: Anacampsis phytomiella; Pest; Shading; Anacardium Occidentale; Praga de Planta; Consorciação de Cultura; Sombreamento; Anacardium; Intercropping. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1144477 |
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| Ureña-Sánchez,Raúl; Callejón-Ferre,Ángel Jesús; Pérez-Alonso,José; Carreño-Ortega,Ángel. |
| The integration of renewable energy sources into greenhouse crop production in southeastern Spain could provide extra income for growers. Wind energy could be captured by small to medium-sized wind turbines, gas could be produced from biomass, and solar energy could be gathered by solar panels. The aim of this study was to examine the effect of flexible solar panels, mounted on top of a greenhouse for electricity production, on yield and fruit quality of tomatoes (Solanum lycopersycum L., cv Daniela). This study was undertaken in a commercial raspa y amagado greenhouse, typical of the Almería region (Spain). Tomato plantlets were planted at a density of 0.75 plants m-2. The flexible solar panels were mounted on two parts of the roof in different... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum lycopersycum L.; Shading; Total production; Renewable energy; Fruit quality. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000400001 |
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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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| Oliveira,Rívia de Souza Vaz; Salomão,Leandro Caixeta; Morgado,Hélber Souto; Sousa,Cleiton Mateus; Oliveira,Henrique Fonseca E de. |
| ABSTRACT Basil is used as spice and for medicinal purposes. Its growth is influenced by environmental factors, mainly soil moisture and air temperature. Thus, this study was installed to evaluate growth and production of basil under different levels of luminosity and water replacement. The experimental design was completely randomized, with six replicates, arranged in split plot scheme, with three luminosity levels in the plots (full sun, 50% and 70% shading) and four water replacement levels in the subplots (25, 50, 75 and 100% ETc). We evaluated plant height, stalk diameter, number of leaves and branches, root system volume, the largest root length, fresh and dry mass of roots and leaves. Data were submitted to variance analysis to observe significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ocimum basilicum; Shading; Water deficit. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000300324 |
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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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| Leal,Caio C. P.; Torres,Salvador B.; Freitas,Rômulo M. O. de; Nogueira,Narjara W.; Farias,Raul M. de. |
| ABSTRACTThis study aimed to determine the effects of the luminosity and type of container on producing Cassia grandis seedlings. Thus, in a substrate composed by topsoil + wood powder (1:1) the seedlings were grown into plastic tubets containing 0.3 dm3 of such substrate, or into plastic pots containing 1.0 dm3 of the same substrate, and subjected to 50 and 25% shading or full sunlight. The assessments were performed every two weeks by measuring plant height and stem diameter, during eight weeks period. At the end of this period, the leaf area, dry mass of shoots and roots, the ratio between height of plant/diameter of stem, and the Dickson quality index were also assessed. The experiment was carried out in a completely randomized design with treatments... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pink shower cassia; Forest species; Forest species seeds; Seedling growth; Shading. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001000939 |
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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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| SANTOS JUNIOR,A.; FREITAS,F.C.L.; SANTOS,I.T.; SILVA,D.C.; PAIXÃO,G.P.; SEDIYAMA,C.S.. |
| ABSTRACT: The repetitive use of glyphosate in the control of weeds in eucalyptus plantations has selected tolerant species such as Commelina benghalensis. Therefore, the use of herbicides of other mechanisms of action, such as saflufenacil, in rotation or combination with glyphosate, is necessary to reduce damages caused by C. benghalensis, whose sensitivity to herbicides can be influenced by the shading caused by the eucalyptus crop. This study aimed to assess the efficiency of saflufenacil in the management of C. benghalensis at different shading levels. Three experiments were carried out regarding a certain shading level (cultivation environment with 0, 40, and 55% shade). The experimental design was a randomized block design with five herbicide doses... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Shading; Chemical control; Biomass allocation; Weed; Benghal dayflower. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100249 |
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| Partelli,Fábio Luiz; Araújo,André Vasconcellos; Vieira,Henrique Duarte; Dias,Jairo Rafael Machado; Menezes,Luis Fernando Tavares de; Ramalho,José Cochicho. |
| The objective of this work was to evaluate the influence of intercropping 'Conilon' coffee (Coffea canephora) with rubber trees on coffee tree microclimate, nutrition, growth, and yield. Rubber trees were planted in two double rows 33 m apart, with 4x2.3 m spacing between plants. Treatments consisted of the distances from the coffee plants to the rubber trees: 3, 6, 9, 12, and 15 m. Measurements of atmospheric variables (temperature, irradiance, and relative humidity), leaf nutrient concentration, internode length of plagiotropic and orthotropic branches, individual leaf area, chlorophyll content, and yield were performed. Intercropping promotes changes in the microclimatic conditions of coffee plants close to rubber trees, with reduction of temperature... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea canéfora; Hevea brasiliensis; Irradiance; Monoculture; Shading. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014001100872 |
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| Registros recuperados: 36 | |
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