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| Silva,Jaomara Nascimento da; Ponciano,Niraldo José; Souza,Claudio Luiz Melo; Souza,Paulo Marcelo de; Viana,Leandro Hespanhol. |
| Abstract Viticulture is a recent activity in Rio de Janeiro, which has been well adapted to the edaphoclimatic conditions of the north and northwest regions of Rio de Janeiro. The aim of this study was to characterize the main socioenvironmental and technological aspects of grape production in these regions. Data were collected in 2017 and 2018, from the application of questionnaires to 16 grape producers in the regions, for descriptive statistical analysis and preparation of tables and graphs. In both regions small producers are the main investors. Most of them do not participate in associations and have technical assistance in particular. The region has favorable edaphoclimatic characteristics, mainly for the cultivation of rustic grapes, predominantly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Viticulture; Vitis labrusca; Rio de Janeiro. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000600501 |
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| Silva,Jaomara Nascimento da; Ponciano,Niraldo José; Souza,Claudio Luiz Melo; Souza,Paulo Marcelo de; Viana,Leandro Hespanhol; Silva,Marcelo Geraldo de Morais. |
| Abstract The ‘Niágara Rosada’ grape (Vitis labrusca) is the main table cultivar produced in the North and Northwest Regions of the Rio de Janeiro State. This cultivar presents greater rusticity and lower production cost than the cultivars of fine grape (Vitis vinifera L.) because it is more resistant to diseases and the absence of some cultural treatments. The research aimed to determine the economic affordability of the production of ‘Niágara Rosada’ grapes in the north and northwest regions of Rio de Janeiro state, by calculating the Net Present Value (NPV) and the Internal Rate of Return (IRR), and to identify the risk of viticulture, through the sensitivity analysis and the use of the Monte Carlo method. To collect the data, questionnaires, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Production costs; Tropical fruit growing; Monte Carlo Simulation; Viticulture. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452021000100501 |
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| Oliveira Júnior,Luiz Fernando Ganassali; Bressan-Smith,Ricardo; Oliveira,Antônia Elenir Amâncio de; Pereira,Messias Gonzaga; Silva,Luciana Belarmindo; Viana,Leandro Hespanhol; Vieira,Henrique Duarte. |
| Durante a germinação e o desenvolvimento pós-germinativo de milho, o fluxo metabólico é intenso, ocorrendo síntese e degradação de açúcares (glicose, frutose e sacarose) e hidrólise de amido, além da redução da concentração do ácido abscísico (ABA). Acredita-se que altas concentrações de glicose exógena, promovam acúmulo de ABA, proporcionando atraso na germinação e desenvolvimento de plântulas. Concentrações menores, por outro lado, podem ocasionar estímulo na germinação e desenvolvimento. Neste trabalho, foi observado que a glicose (800 µM) estimulou a germinação e o desenvolvimento inicial de genótipo de milho comum e retardou, severa ou brandamente, genótipos de milho doce (su1), provavelmente devido às diferentes concentrações endógenas de glicose de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desenvolvimento de plântulas; Germinação de sementes; Glicose; Insulina; (Zea maize L.) milho doce (Su1). |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300014 |
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| Deus,Bruna Corrêa da Silva de; Figueiredo,Fábio Afonso Mazzei Moura de Assis; Almeida,Luciana Venturotti Braun de; Ferraz,Tiago Massi; Martins,Amanda Oliveira; Rodrigues,Weverton Pereira; Viana,Leandro Hespanhol; Esteves,Barbara dos Santos; Campostrini,Eliemar. |
| ABSTRACT: New techniques in tropical regions such as use of transparent plastic covering (TPC), have been employed in grapes to avoid the wetting leaves and fruits, which can reduce the occurrence of fungal diseases, reduce the use of sprays, and reduce damage caused by hail and high winds. TPC may significantly affect the photosynthetic rates of grapevines cultivated in tropical regions, and thus have strong effects on plant productivity and improve fruit quality. However, in the North of Rio de Janeiro region there are lacks of studies related to TPC effects on photosynthetic capacity. The objective of this study was to evaluate the photosynthetic capacity in 'Niagara Rosada' vines grown under TPC and without transparent plastic covering (WTPC). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Photosynthesis; Chlorophyll fluorescence; Vitisla brusca; Covered system. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600950 |
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| Souza,Claudia Rita de; Bassoi,Luís Henrique; Lima Filho,José Moacir Pinheiro; Silva,Fabrício Francisco Santos da; Viana,Leandro Hespanhol; Dantas,Barbara França; Pereira,Maiane Santos; Ribeiro,Paula Rose de Almeida. |
| There is an increased demand for high quality winegrapes in the São Francisco Valley, a new wine producing area in Brazil. As the grape quality is closely linked to the soil water status, understanding the effects of rootstock and irrigation management on grapevine water relations is essential to optimize yield and quality. This study was carried out to investigate the effects of irrigation strategies and rootstocks on water relations and scion vigour of field-grown grapevines in Petrolina, Pernambuco state, Brazil. The cultivars used as scions are Moscato Canelli and Syrah, both grafted onto IAC 572 and 1103 Paulsen rootstocks. The following water treatments were used: deficit irrigation, with holding water after veraison; and partial root-zone drying,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis vinifera L.; Partial rootzone drying; Deficit irrigation; Stomatal conductance. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400002 |
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