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| Registros recuperados: 63 | |
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| Trevizan,Luiz Roberto P.; Baptista,Gilberto C. de; Papa,Geraldo. |
| Increasing horticultural production under protected cultivation requires more detailed studies about the occurence of pesticide residues, due to the special and peculiar environment under controlled conditions, in which some pests, that are of little concern in the field, become important. The insecticide acephate and its methamidophos metabolite residues were evaluated in greenhouse-grown tomatoes and compared to an open-field tomato crop. The treatments: (a) check; (b) one application of 75 g a.i. acephate.100 L-1 water; (c) one application of 150 g a.i.100 L-1 water; (d) four applications of 75 g a.i.100 L-1 water were evaluated. Fruit, leaf and soil samples were taken at (-1), zero, 1, 3, 7, 14, 21 days after the last or only application. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Pesticide residues; Metabolism; Greenhouse. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362005000100008 |
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| Lima,Carlos Eduardo P; Fontenelle,Mariana R; Ligoski,Gabriela R; Madeira,Nuno R; Oliveira,Valter R; Pinheiro,Jadir B; Gondim,Rubens S; Lima,Mirtes F. |
| ABSTRACT The need to adapt agricultural crops to climate change and to develop more sustainable cultivation systems has been a major challenge for agriculture. In this study the effects of soil conservation practices were evaluated on production aspects of melon (Cucumis melo), cultivar BRS Araguaia, cultivated in a greenhouse under soil and climatic conditions of the Brazilian Cerrado. The adopted experimental design was of randomized blocks with three treatments (soil managements) and six replicates. We evaluated the following soil management systems: no-tillage (PD), minimum tillage (CM) and conventional tillage (PC) in two cycles. Increases in commercial productivity and average number of marketable fruits were observed for PD (61.5 and 61.2 t/ha;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; No-tillage; Minimum tillage; Conventional tillage; Greenhouse. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000400576 |
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| Cometti,Nilton N; Bremenkamp,Diene M; Galon,Karla; Hell,Leonardo R; Zanotelli,Marinaldo F. |
| The study was conducted in greenhouse at horticulture department of the Instituto Federal do Espírito Santo, Campus Itapina, Colatina, northwestern Espírito Santo state, Brazil, with the objective of evaluating the effect of cooling and electrical conductivity of nutrient solution on growth and development of lettuce cv. Vitória de Santo Antão in hydroponics. The study was conducted in a completely randomized design with two factors (control of the maximum temperature of the nutrient solution: 26ºC and without control; and electrical conductivity, EC, of the solution: 1, 2 and 3 dS m-1) with three repetitions. The plants were harvested fifty-two days after sowing (DAS). We evaluated the dry and fresh mass of leaves, stems and roots, stem and root length,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Greenhouse; Temperature. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000200018 |
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| Precipito,Laís MB; Dario,Gustavo; Oliveira,João V; Oliveira,Rone B. |
| ABSTRACT On tomato, cucumber and bell pepper cultivation, commonly large quantities of plant-protection products are applied, to control pests and diseases, as a way to guarantee better productivity and final product quality. The knowledge of spreading and evaporation time of spray droplets is fundamental to understand the interaction between fungicides and target surface for proper distribution of this fungicide. This study was installed to determine the wetting area and droplet evaporation of sprays containing the fungicide Cabrio Top, with or without adjuvant Nimbus®, deposited on leaves and artificial surfaces (glass slide). A system was used which analyzes images composed of a droplet generator, a stereoscope camera for capturing images and a climatic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vegetables; Application technology; Greenhouse; Image analysis; Spray droplets. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300320 |
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| Carvalho, Rafael Pelloso de; Davide, Livia Maria Chamma; Gomes Borges, Felipe Luis; Davide, Antonio Claudio; Daniel, Omar. |
| O objetivo desse trabalho foi avaliar características morfofisiológicas entre diferentes procedências de canafístula (Peltophorum dubium) submetidas a ambientes distintos quanto à disponibilidade de água e nutrientes no solo. O experimento foi conduzido em casa de vegetação, em delineamento experimental inteiramente casualizado, com 12 tratamentos e quatro repetições, dispostos em esquema fatorial 3 (procedências) x 2 (adubações) x 2 (irrigações). Foram coletados dados de altura de plantas, diâmetro do colo e índice SPAD (soil plant analysis development) ao longo do experimento em intervalos de 15 dias. Ao final do experimento foi aferido o peso da matéria seca da parte aérea, de raízes e total, quociente entre matéria seca de parte aérea e matéria seca de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Recursos Florestais Manejo Florestal; Genética Florestal Peltophorum dubium; Espécie florestal nativa; Adubação; Irrigação; Casa-de-vegetação Peltophorum dubium; Native tree species; Fertilization; Irrigation; Greenhouse. |
| Ano: 2015 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/889 |
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| Bomfim,Isac Gabriel Abrahão; Bezerra,Antônio Diego de Melo; Nunes,Alexandre Campos; Freitas,Breno Magalhães; Aragão,Fernando Antonio Souza de. |
| The objective of this work was to evaluate the floral biology and pollination requirements of seeded and seedless mini watermelon varieties, and to determine the best varieties to cultivate under protected environment. Three seedless (HA-5106, HA-5158, and HA-5161) and two seeded (Minipol and Polimore) genotypes were tested. Flowers were monitored from the pre-anthesis stage to senescence, and fruit quality was also evaluated. The evaluated treatments were hand-geitonogamous pollination (MG), cross-pollination with pollen from the Polimore variety (MCP), cross-pollination with pollen from the Minipol variety (MCM), and restricted pollination. All varieties had monoecious plants with diclinous flowers, and the stigmas remained receptive throughout anthesis.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrullus lanatus; Flowering; Fruit quality; Fruit set; Greenhouse. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000100044 |
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| Sussman, Deborah. |
| This bulletin provides an overview of trends in cropland values in Canada. Cropland values are a major component of farm wealth which, together with income can be used as a measure of the economic well-being of farm households. Cropland values are provided for a 3-year period, 2005-2007, for each province and farm type (beef, hog, poultry and egg, dairy, grain and oilseed, potato, greenhouse, and fruit and vegetable farms). |
| Tipo: Report |
Palavras-chave: Canada; Province; Cropland; Value; Beef; Hog; Poultry and egg; Dairy; Grain and oilseed; Potato; Greenhouse; Fruit and vegetable; Agricultural and Food Policy; Agricultural Finance. |
| Ano: 2009 |
URL: http://purl.umn.edu/53931 |
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| Guerra E., Guillermo A.; Aguilar Valdes, Alfredo; Cabral Martell, Agustin; Alvarado Martinez, Luis Felipe; Alvarado Martinez, Tomas Everardo; Arras Vota, Ana Maria; Moreno Medina, Salomon. |
| For decades, food security has been a worldwide problem affecting the poorest in order to find a possible solution to this dilemma that not only continues, but constantly grows with the increase in population. Agriculture, as the main food supplier, has evolved and increased its productivity, and has expanded its agricultural frontiers, since previous decades, in its attempts to solve this problem. If predominant conventional agriculture (mainly dedicated to productivity) is complemented with substantial increase of transgenic, organic, agroecological, greenhouse and hydroponic crops, it will be more feasible to avoid the loss of forest, the damage and loss of soils and at the same time diminish food insecurity. Within this context, the agribusiness... |
| Tipo: Journal Article |
Palavras-chave: Food security; Transgenic; Organics; Agro ecological; Hydroponics; Greenhouse; Agribusiness manager.; Agribusiness. |
| Ano: 2011 |
URL: http://purl.umn.edu/99477 |
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| Romero Arenas, Omar; Barrios Díaz, Juan Manuel; Macias Lopez, A.; Simon Baez, A.; Ibanez Martinez, A.; Juarez Huerta, F.. |
| The profitability of a production system of oyster mushrooms was evaluated under conditions of greenhouse with a surface of 112 m2 located in San Salvador Chachapa, pertaining to the municipality of Amozoc de Mota in the state of Puebla. The indicators of economic evaluation were used: net present value (NPV), relation benefit-cost (B/C), relation net benefitinvestment (N/K) and internal rate of return (IRR) to make the yield analysis. The results obtained for a period of 5 years were: NPV = 50.098,46, B/C = 1, 04, N/K = 1.23 and IRR = 11.82. With base in these indicators, one concluded that the project is viable from the economic point of view. In accordance with analysis, profitability of project of investment is excellent and the production system of... |
| Tipo: Journal Article |
Palavras-chave: Oyster mushrooms; Greenhouse; Profitability; Economic indicators.; Agribusiness. |
| Ano: 2009 |
URL: http://purl.umn.edu/53109 |
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| Cramton, Peter; Kerr, Suzi. |
| An auction of carbon permits is the best way to achieve carbon caps set by international negotiation to limit global climate change. To minimize administrative costs, permits would be required at the level of oil refineries, natural gas pipe lines, liquid sellers, and coal processing plants. To maximize liquidity in secondary markets, permits would be fully tradable and bankable. The government would conduct quarterly auctions. A standard ascending-clock auction in which price is gradually raised until there is no excess demand would provide reliable price discovery. An auction is preferred to grandfathering (giving polluters permits in proportion to past pollution), because it allows reduced tax distortions, provides more flexibility in distribution of... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Greenhouse; Climate change; Carbon trading; Auction; Ascending-clock; Tradable permits; Environmental Economics and Policy; Q3; D4. |
| Ano: 1998 |
URL: http://purl.umn.edu/10668 |
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| King, Helen. |
| A comprehensive emissions trading scheme (ETS) is Australia’s principal climate change policy instrument. There are undoubtedly benefits of full ETS coverage. However, if emissions that cannot be affordably, reasonably and accurately measured are included, these must be balanced against potential costs. This report explores why agriculture is different from other sectors. Agriculture’s diffuse and diverse emissions are inherently difficult to measure. They also fluctuate in response to environmental factors such as climate and biophysical characteristics. It is problematic to include the agriculture sector in the ETS, at reasonable cost and with incentives for behaviour change at the emission source. This is because of the climate and biophysical... |
| Tipo: Report |
Palavras-chave: Agriculture; Greenhouse; Abatement; Emissions trading; Agricultural and Food Policy; Environmental Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/94809 |
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| Moreno Resendez, Alejandro; Aguilar Duron, Juanita; Luevano Gonzalez, Armando. |
| The Secretaria de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación (SAGARPA) and the Universidad Autónoma Agraria Antonio Narro (UAAAN) have signed agreements, looking a vision more attached to the reality of the conditions, factors and obstacles that affect productive process in Mexico, in order to generate recommendations that increase the efficiency of the involved programs of support with the farming production. Derived of the participation in the Rapid Assessment of Program Acquisition of Productive Assets: Component Protected Agriculture 2008, the characteristics and the context are approached in which the agriculture protected in Mexico is develops. The definition of “protected agriculture” settles down, their characteristics are... |
| Tipo: Journal Article |
Palavras-chave: Greenhouse; Agriculture; Environmental risks; Agricultural production; Vegetables.; Agribusiness. |
| Ano: 2011 |
URL: http://purl.umn.edu/114479 |
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| Souza,Álvaro H. C. de; Rezende,Roberto; Lorenzoni,Marcelo Z.; Seron,Cássio de C.; Hachmann,Tiago L.; Lozano,Cláudia S.. |
| ABSTRACT The objective of the present study was to evaluate the response of eggplant, cv. ‘Ciça’, with respect to yield, number of fruits and dry matter (root and stem), when grown in a greenhouse and conducted under fertigation with nitrogen and potassium. The experiment was conducted in the Irrigation Technical Center of the State University of Maringá, between the months of February and August 2015. Four nitrogen doses (0.0; 6.43; 12.86 and 25.72 g of N plant-1) and four potassium doses (0.0; 5.18; 10.36 and 20.73 g of K plant-1) were tested, totaling 16 treatments in a 4 x 4 factorial scheme, arranged in a completely randomized design with four replicates, in a Red Latosol with sandy texture. The highest number of fruits per plant and yield were found... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vegetables; Yield; Greenhouse; Solanum melongena L.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000100021 |
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| Almeida,Willian F. de; Paz,Vital P. da S.; Jesus,Ana P. C. de; Silva,Jucicléia S. da; Gonçalves,Karoline S.; Oliveira,Andressa S. de. |
| ABSTRACT In view of the imminent need for efficient water use and the search for adequate management techniques to reduce the effect of salinity on plants, a study was conducted to evaluate the effect of continuous and pulses drip irrigation with saline water on green bean yield and water use efficiency. The experiment was conducted in a greenhouse, in a completely randomized design, with treatments distributed in a 2 x 5 factorial arrangement. The first factor was type of drip irrigation, i.e., continuous or pulse, while the second factor was the levels of water salinity (electrical conductivity of 0.3, 1.5, 2.5, 3.5 and 4.5 dS m-1), with five replicates, and two plants per replicate, totaling 50 experimental units. The following variables were analysed:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Pot; Greenhouse; Water use efficiency. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000700476 |
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| Souza,Antonio Jackson de Jesus; Guimarães,Rubens José; Colombo,Alberto; Sant’Ana,José Antonio do Vale; Castanheira,Dalyse Toledo. |
| ABSTRACT This study aimed to evaluate the use of hydro polymer retainer in the quantitative growth of coffee plants at different levels of irrigation and soil types. The experiment was conducted in pots with seedlings bag in the greenhouse of the Setor de Cafeicultura, Universidade Federal de Lavras. The experimental design was in randomized blocks in factorial (2x4x2): absence or presence of hydro polymer retainer, four levels of irrigation (25%, 50%, 75% and 100%), two soil types (sandy soil and medium texture). At 150 days evaluated the stem diameter, plant height, leaf area, number of leaves, dry weight of shoots, plant dry mass, root dry weight, root dry weight ratio of shoot, leaf area ratio, absolute growth rate, relative growth rate, net... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil types; Greenhouse; Coffea arabica L.; Hydrogel. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000100162 |
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| Pires,Regina Célia de Matos; Folegatti,Marcos Vinícius; Passos,Francisco Antonio; Arruda,Flávio Bussmeyer; Sakai,Emílio. |
| The vegetative growth and yield of strawberry in relation to irrigation levels and soil mulches are still not well known, mainly for different environmental conditions. Two experiments were carried out in Atibaia, SP, Brazil, during 1995, one in a protected environment and the other in an open field, to evaluate the cultivar Campinas IAC-2712, under different irrigation levels and soil mulches (black and clear polyethylene). Three water potential levels in the soil were used in order to define irrigation time, corresponding to -0.010 (N1), -0.035 (N2), and -0.070 (N3) MPa, measured through tensiometers installed at the 10 cm depth. A 2 × 3 factorial arrangement was adopted, as randomized complete block, with 5 replicates. In the protected cultivation, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fragaria × Ananassa Duch.; Trickle irrigation; Water management; Greenhouse. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000500001 |
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| Marcussi,Francisco Fernando Noronha; Villas Bôas,Roberto Lyra; Godoy,Leandro José Grava de; Goto,Rumy. |
| Information on nutrient demand during each growth stage is essential for efficient application of nutrients. A pot experiment was carried out with a Typic Hapludox under greenhouse conditions in Botucatu, SP, Brazil, aiming was to determine nutrient uptake and partition of sweet pepper plants, cultivar Elisa in randomized block design with four replications. The fertigation was simulated through 2-L PET bottles (neck down with a tube and a flow regulator at the end, simulating a drip irrigation system). Four plants per replication were collected at eight growth stages (0, 20, 40, 60, 80, 100, 120 and 140 days after the seedling transplant - DAT). The period of largest extraction of nutrients for the plant occurred from 120 to 140 DAT, which coincides with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum L.; Irrigation; Greenhouse; Growth. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100011 |
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| Registros recuperados: 63 | |
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