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| Registros recuperados: 116 | |
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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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| Silva,Marcelo de Almeida; Soares,Rogério Augusto Bremm; Landell,Marcos Guimarães de Andrade; Campana,Mário Pércio. |
| Water deficit is one of the major factors limiting the production of sugarcane, especially in areas where there is a prolonged period of water deficiency, such as the West Central Brazilian region. One way to overcome this problem is to cultivate resistant or tolerant varieties. An experiment was set up at the Jalles Machado Sugar Mill, located near Goianésia, Goiás State, Brazil, to evaluate agronomic performance of several sugarcane families. A comparative analysis was carried out among the families under two irrigation regimes, one under regular environmental conditions and another under monthly irrigations during the period of water deficiency. Evaluated families consisted of 25 progenies planted in a factorial design with three replications with 20... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selection; Water deficit; Irrigation; Brix. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052008000300014 |
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| Rocha,Pablo A; Santos,Marcelo R; Donato,Sérgio LR; Brito,Cleiton FB; Ávila,Joseani S. |
| ABSTRACT This study aimed to evaluate productive, physiological and phytotechnical characteristics of bell pepper under different irrigation strategies, in soil with mulch (polyethylene film, black on bottom, white on top) and without mulching. The experimental design was of randomized blocks with four replicates, arranged in split plot scheme; plots consisted of treatments with and without mulching, and in the subplots ten irrigation strategies = 1) 125% of crop evapotranspiration (ETc); 2) 100% of ETc; 3) 75% of ETc; 4) 50% of ETc, both in vegetative phase (FI) and production phase (FII); 5) regulated deficit irrigation (RDI); with 50% of ETc in FI and 100% of ETc in FII; 6) RDI with 100% of ETc in FI and 50% of ETc in FII; 7) RDI with 75% of ETc in FI... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Water deficit; Mulching; Water-use efficiency. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000400453 |
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| Cardozo,Nilceu Piffer; Sentelhas,Paulo Cesar. |
| The lack of information about the effects of cultivars, crop age and climate on the sugarcane (Saccharum ssp.) crop yield and quality has been the primary factor impacting the sugar-ethanol sector in Brazil. One of the processes about which we do not have a satisfactory understanding is sugarcane ripening and the effects of cultivars, crop age and climate on that. Sugarcane ripening is the process of sucrose accumulation in stalks, which is heavily influenced by several factors, mainly by climatic conditions such as air temperature and water deficits. Because it is a complex process, studies of the variables involved in sugarcane ripening can provide important information, resulting in a better use of commercial cultivars, bringing advantages to growers,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp; Air temperature; Precipitation; Water deficit; Sucrose. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000600011 |
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| Bruno,Isabeli Pereira; Silva,Adriana Lúcia da; Reichardt,Klaus; Dourado-Neto,Durval; Bacchi,Osny Oliveira Santos; Volpe,Clóvis Alberto. |
| The use of climatological water balances in substitution to complete water balances directly measured in the field allows a more practical crop management, since the climatological water balances are based on data monitored as a routine. This study makes a comparison between these methods in terms of estimatives of evapotranspiration, soil water storage, soil available water, runoff losses, and drainage below root zone, during a two year period, taking as an example a coffee crop of the variety Catuaí, three to five years old. Climatological water balances based on the estimation of the evapotranspiration through the methods of Thornthwaite and Penman-Monteith, can reasonably substitute field measured balances, however underestimating the above mentioned... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evapotranspiration; Soil water storage; Available water; Water deficit; Water excess. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000300001 |
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| Frosi,Gabriella; Harand,Wolfgang; Oliveira,Marciel Teixeira de; Pereira,Silvia; Cabral,Simone Pereira; Montenegro,Abelardo Antônio de Assunção; Santos,Mauro Guida. |
| ABSTRACT The effects of water deficit on physiological and biochemical variables of young plants of two tropical woody species, Pachira aquatica and Sterculia foetida, and their recovery abilities were measured. Leaf water potential, gas exchange and selected carbon metabolism components were measured in a greenhouse experiment with control, moderate and severe water deficit treatments. Under severe drought stress, gas exchange and chlorophyll fluorescence decreased in both species compared to their respective controls. After rehydration, P. aquatica and S. foetida showed a partial and full recovery of the measured variables, respectively. In addition, a decrease and an increase in photosynthetic pigments were observed for P. aquatica and S. foetida,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chlorophyll fluorescence; Climate changes; Gas exchange; Semiarid; Water deficit. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200153 |
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| MARTORANO, L. G.; BERGAMASCHI, H.; DIAS, C. T. dos S.; DALMAGO, G. A.; FARIA, R. T. de; HECKLER, B. M.. |
| It is considered that management system effects can express differences within soil water conditions and be reflected upon crop?s responses. In order to assess these effects and responses, a field experiment was installed during 2003/2004 cropping period, in a Typical Dystrophic Red Argissoil (Brazilian Soil Classification System). The experimental design, adopted in a 0.5 hectare area was in strips, with four treatments and four repetitions for each one. No-tillage system (NT) was used in half of the experimental area, while the other half was tilled in conventional system (CT), both areas had irrigated (I) and non-irrigated (NI). The experiment used soybean crop (Fepagro RS10, a long cycle cultivar), grown at the Agronomic Experimental Station in... |
| Tipo: Artigo de periódico |
Palavras-chave: Management system soybea; Water deficit; Déficit hídrico; Brasil.; Soja.; Brazil.. |
| Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1007396 |
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| ALVES, G. S. C.; TORRES, L. F.; DÉCHAMP, E.; BREITLER, J-C.; JOËT, T.; GATINEAU, F.; ANDRADE, A. C.; BERTRAND, B.; MARRACCINI, P.; ETIENNE, H.. |
| Despite the importance of the DREB1D gene (also known as CBF4) in plant responses to water deficit and cold stress, studies analysing its regulation by transgenic approaches are lacking. In the current work, a functional study of three CcDREB1D promoter haplotypes (named HP15, HP16 and HP17) isolated from drought-tolerant and droughtsensitive clones of Coffea canephora was carried out in plants of C. arabica stably transformed by Agrobacterium tumefaciens by analysing their ability to regulate the expression of the uidA reporter gene in response to water deficit mimicked by polyethylene glycol (−2.0 MPa) and low relative humidity treatments. |
| Tipo: Artigo de periódico |
Palavras-chave: Water deficit; DREB1D gene; UidA reporter gene; Reporter gene.; Genetic transformation; Haplotypes.. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1084513 |
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| GUIMARÃES-DIAS, F.; NEVES-BORGES, A. C.; CONFORTE, A. J.; GIOVANELLA-KAMPMANN, L.; FERREIRA, A. V. J.; AMORIM, R. M. S.; BENEVENT, M. A.; SÁ, M. E. L. de; MESQUITA, R. O.; RODRIGUES, F. A.; NEPOMUCENO, A. L.; ROMANO, E.; LOUREIRO, M. E.; GROSSI-DE-SA, M. F.; ALVES-FERREIRA, M.. |
| Tipo: Separatas |
Palavras-chave: Drought adaptation; Marker assistance selection; Water deficit; Glycine Max; Transcription factors. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1056209 |
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| Oliveira,Deborah; Medeiros,Maria; Pereira,Silvia; Oliveira,Marciel; Frosi,Gabriella; Arruda,Emília; Santos,Mauro. |
| ABSTRACT The main goal of this study was to evaluate the performance of two palm species under semi-arid conditions during the rainy and dry periods: the semi-arid native Syagrus coronata and a native to tropical America, Acrocomia aculeata. The leaf water potential, gas exchange, leaf soluble sugars, starch, free amino acids, total soluble protein content and morphological traits were measured. The highest leaf water potential and CO2 assimilation values in both species were achieved during the rainy period. In response to the low soil moisture content during the dry period, gas exchange decreased 72 and 92% in S. coronata and A. aculeata, respectively, when compared with values from rainy period. As evergreen plants, both species maintained intact leaf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acrocomia aculeata; Evergreen species; Gas exchange; Syagrus coronata; Water deficit. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200128 |
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| Registros recuperados: 116 | |
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