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| Registros recuperados: 96 | |
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| Ben,Luis H. B.; Peiter,Marcia X.; Robaina,Adroaldo D.; Kirchner,Jardel H.; Mezzomo,Wellington; Pimenta,Bruna D.. |
| ABSTRACT The choice of a maize hybrid, considering the technology level and irrigation management, contributes to the improvement of the plant productivity and water use efficiency (WUE). Thus, the objective of this study was to evaluate the effects of irrigation depths on production components, grain yield, technical efficiency, and WUE in maize hybrids. The experiment was conducted in Santiago, RS state, Brazil, in the 2015/2016 and 2016/2017 crop seasons, using a randomized block design in factorial scheme, consisting of five irrigation depths (0, 50, 75, 100 and 125% of crop evapotranspiration - ETc) and four maize hybrids in crop season I (2015/2016), and six maize hybrids in crop season II (2016/2017). The number of ears per plant, number of grains... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water deficit; Zea mays L.; Water use efficiency; Genotypes; Grain yield. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700524 |
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| Bogale, Ashinie; Spreer, Wolfram; Gebeyehu, Setegn; Aguila, Miguel; Müller, Joachim. |
| Scarcity of freshwater due to recurrent drought threatens the sustainable crop production in semi-arid regions of Ethiopia. Deficit irrigation is thought to be one of the promising strategies to increase water use efficiency (WUE) under scarce water resources. A study was carried out to investigate the effect of alternate furrow irrigation (AFI), deficit irrigation (DI) and full irrigation (FI) on marketable fruit yield, WUE and physio-chemical quality of four fresh-market tomato cultivars (Fetan, Chali, Cochoro and ARP Tomato d2) in 2013 and 2014. The results showed that marketable yield, numbers of fruits per plant and fruit size were not significantly affected by AFI and DI irrigations. WUE under AFI and DI increased by 36.7% and 26.1%, respectively... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Natural resource management deficit irrigation; Tomato (Solanum lycopersicum L.); Tomato quality; Water scarcity; Water use efficiency. |
| Ano: 2016 |
URL: http://www.jarts.info/index.php/jarts/article/view/2016092050949 |
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| Fang, Lan; Nuppenau, Ernst-August. |
| China's fast growing economy has brought some environmental problems, especially in water administration. Inefficiencies in irrigation activities have created severe negative effects to the environment of rural communities, and the more serious water shortages hamper food production, too. Major questions at hand are, how to improve water use efficiency, to reduce negative external effects, to optimize water allocation in agriculture, to invest in water saving technologies, and to assure more water for high value added agriculture. This paper investigates the impacts of irrigation technologies and investments in water saving on the rural economy and the environment. By taking into account individual farmers' inclination to adopt modern water-saving... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: A spatial model; Water use efficiency; Adoption of irrigation technology; Technology; Resource /Energy Economics and Policy; C61; Q25; Q56. |
| Ano: 2006 |
URL: http://purl.umn.edu/25437 |
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| Valença,David da Cunha; Carvalho,Daniel Fonseca de; Reinert,Fernanda; Azevedo,Ricardo Antunes; Pinho,Camila Ferreira de; Medici,Leonardo Oliveira. |
| ABSTRACT: Concerns with water crisis involve all sectors of society and irrigated agriculture remains the main water consumer. This study evaluated an agricultural production system for lettuce cultivation in greenhouse, “organic potponics”, to economize water and manure use, using a Simplified Irrigation Controller (SIC), based on soil matric potential monitoring. Five irrigation volumes were evaluated in pots with 4.8 L, fertilized with 200 g of vermicompost. One of the volumes was controlled with the SIC. The other volumes represented 130, 80, 60 and 33 % of that controlled by the SIC and all treatments received water at the same time. Shoot fresh weight, head diameter and stomatal conductance (gs) increased linearly with irrigation volumes. For shoot... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Water use efficiency; Production system; Water management; Automation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100052 |
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| Bezerra,Ana Carolina Mendes; Valença,David da Cunha; Carvalho,Daniel Fonseca de; Pinho,Camila Ferreira de; Reinert,Fernanda; Gomes,Daniela Pinto; Gabetto,Fernanda Palmeira; Azevedo,Ricardo Antunes; Masseroni,Daniele; Medici,Leonardo Oliveira. |
| ABSTRACT: Seedling production is an important step in the lettuce production system. However, there is a tendency to apply excessive irrigation at this stage. The aim of this study was to test the use of the Simplified Irrigation Controller (SIC) under two conditions: first, with the sensor installed in the substrate (measuring the soil water tension) and second, in the atmosphere (“atmospheric” - responding to vapor demand in the atmosphere) to control the irrigation of lettuce seedlings. The performance of the SIC was evaluated by monitoring plant traits. The lettuce seeds of the Regina cultivar were sown in styrofoam trays with commercial organic substrate. Both experiments were conducted under greenhouse conditions and evaluated under different SIC... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa L.; Simplified Irrigation Controller; Water use efficiency. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001200179 |
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| MARANHÃO, S. R.; POMPEU, R. C. F. F.; SOUZA, H. A. de; CÃNDIDO, M. J. D.; ARAÚJO, R. A. de; FONTINELE, R. G.; MENESES, F. M. N.; PRIMO, A. A.. |
| Resumo: A irregularidade na distribuição das chuvas, aliado as distintas características edafoclimáticas das regiões semiáridas, torna laboriosa a produção de forragem em quantidade e qualidade. Nesse sentido, se faz necessário o estudo de diferentes gramíneas com potencial de adaptação e que atendam aos diferentes níveis tecnológicos de utilização da terra. Assim, objetivou-se avaliar as características estruturais de cinco gramíneas forrageiras tropicais: Búffel (Cenchrus ciliares); Paiaguás e Piatã (Brachiaria brizantha); Massai e Tamani (Panicum maximum) sob regime de baixo nível tecnológico de utilização da terra, em um delineamento inteiramente casualizado com seis repetições (vasos). |
| Tipo: Resumo em anais de congresso (ALICE) |
Palavras-chave: Biomassa de lâmina foliar; Eficiência de uso da água; Paiaguás; Piatã; Massai; Tamani; Water use efficiency; Brachiaria brizantha; Cenchrus ciliares; Panicum maximum; Capim búffel; Water use efficiency. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/1057530 |
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| Calvache,M.; Reichardt,K; Bacchi,O.O.S.; Dourado-Neto,D.. |
| To identify specific growth stages of the common bean crop at which the plant is less sensitive to water stress, in which irrigation could be omitted without significant decrease hi final yield, two field experiments were conducted at "La Tola" University Experimental Station, Tumbaco, Pichincha, Ecuador, on a sandy loam soil (Typic Haplustoll). The climate is tempered and dry (mean air temperature 16°C and mean relative humidity 74%, during the cropping season) 123 and 109 mm of rainfall were recorded during the experimental cropping periods (July to October), of 1992 and 1994, respectively. The treatments consisted of combinations of 7 irrigation regimes including normal watering; full stress; (traditional management practice); single stress at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Common bean; Irrigation; Water stress; Water use efficiency. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300002 |
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| CARDOSO, M.J.; MELO, F. de B.; ANDRADE JUNIOR, A.S. de. |
| Dois experimentos foram conduzidos no municipio de Teresina, PI, em solo Aluvial eutrofico, sob irrigacao convencional, em 1993, com o objetivo de avaliar o comportamento produtivo do caupi (Vigna unguiculata (L.)Walp.), de porte enramador e moita, em difenretes densidades de plantas. O delineamento experimental foi o de blocos casualizados, em esquema fatorial 3 x 6, com quatro repeticoes. As cultivares de porte enramador foram BR 14-Mulato, BR 7-Parnayba e BR 10-Piaui, associadas as densidades de 2,5; 5,0; 7,5;10,0,12,5 e 15,0 plantas m-2, e as de porte moita, BR 12-Caninde, Vita 7 e IT 82D-784, combinadas com as densidades de 3,33; 6,67; 10,00; 13,30; 16,67 e 20,00 plantas m-2. Em ambos os experimentos a interacao cultivar x densidade nao foi... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Caupi; Numero de plantas por area; Cultivar; Eficiencia de uso da agua; Plant number by area; Plant population; Water use efficiency. |
| Ano: 1997 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/88590 |
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| Aguilar Benítez, Gisela. |
| Se ha evidenciado que la vermicomposta puede mejorar la germinación y el crecimiento y productividad de las plantas; sin embargo, su efecto combinado con déficit de humedad ha sido escasamente documentado. El objetivo de esta investigación fue evaluar el efecto de la vermicomposta en la germinación, crecimiento inicial y rendimiento en plantas C3 y C4, con déficit de humedad en el suelo. En laboratorio se evaluó la germinación de dos cultivares de frijol y dos de maíz, con respuesta contrastante a sequía, en suelo sin y con 1.5, 3, 6 y 9 % de vermicomposta, y con potenciales de agua (ΨA) de -0.03 y -2 MPa; en invernadero se cuantificó el intercambio de gases y crecimiento de maíz, así como algunos componentes del rendimiento de frijol, en suelo sin y con... |
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Palavras-chave: Estrés; Floración; Semilla; Germinación; Uso eficiente del agua; Stress; Flowering; Seeds; Germination; Water use efficiency; Doctorado; Botánica. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/452 |
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| Aguilar Benítez, Gisela. |
| Se ha evidenciado que la vermicomposta puede mejorar la germinación y el crecimiento y productividad de las plantas; sin embargo, su efecto combinado con déficit de humedad ha sido escasamente documentado. El objetivo de esta investigación fue evaluar el efecto de la vermicomposta en la germinación, crecimiento inicial y rendimiento en plantas C3 y C4, con déficit de humedad en el suelo. En laboratorio se evaluó la germinación de dos cultivares de frijol y dos de maíz, con respuesta contrastante a sequía, en suelo sin y con 1.5, 3, 6 y 9 % de vermicomposta, y con potenciales de agua (ΨA) de -0.03 y -2 MPa; en invernadero se cuantificó el intercambio de gases y crecimiento de maíz, así como algunos componentes del rendimiento de frijol, en suelo sin y con... |
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Palavras-chave: Estrés; Floración; Semilla; Germinación; Uso eficiente del agua; Stress; Flowering; Seeds; Germination; Water use efficiency; Doctorado; Botánica. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/452 |
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| Registros recuperados: 96 | |
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