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Intercropping maize and cowpea cultivars: II. Dry grain yield Rev. Ciênc. Agron.
Silva,Marcos Antônio Leite da; Lima e Silva,Paulo Sérgio; Oliveira,Vianney Reinaldo de; Sousa,Roberto Pequeno de; Silva,Jaeveson da.
ABSTRACT There is interest in identifying the best maize and cowpea cultivars to be used in monocropped and intercropping systems for the production of dry grain. In order to meet this interest, two monocrops of cowpea (the traditional varieties, Corujinha and Sempre Verde) were evaluated with two monocrops of maize (the AG 1051 double hybrid and the AL Bandeirante variety) and four intercrops (combinations of the cowpea varieties and the maize cultivars). Under the intercropping systems, the maize and cowpea occupied alternating rows. A completely randomized block design with six replications was used. Grain growth and yield were higher in the AG 1051 hybrid than in the AL Bandeirante variety in both the monocropped and intercropping systems. For...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Vigna unguiculata; Monocrops; Land Equivalent Ratio.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400406
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Intercropping maize and cowpea cultivars: I. Green-grain yield Rev. Ciênc. Agron.
Silva,Marcos Antônio Leite da; Silva,Paulo Sérgio Lima e; Oliveira,Vianney Reinaldo de; Sousa,Roberto Pequeno de; Silva,Paulo Igor Barbosa e.
ABSTRACT Green ears of maize are much appreciated all over Brazil and reach higher prices than dry grain. This also occurs with green cowpea grain, which is much appreciated in the north and northeast of the country. The aim of this study was to identify maize and cowpea cultivars that can be grown as monocrops or intercrops to produce green grain in the state of Pará (PA). An experiment was carried out in a randomized block design with six replications in Marabá, PA. Monocrops of traditional varieties of the cowpea (‘Corujinha’ and ‘Sempre Verde’) and the maize cultivars (‘AG 1051’ and ‘AL Bandeirante’), and four alternating, intercropped rows of a combination of the varieties and cultivars were evaluated. The ‘AG 1051’ cultivar was more productive than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Vigna unguiculata; Green maize; Green beans; Land equivalent ratio.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100414
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Sample size and sampling method for evaluation of characteristics of the sunflower1 Rev. Ciênc. Agron.
Silva,Paulo Sérgio Lima e; Santos,Luiz Eduardo Barreto dos; Oliveira,Vianney Reinado de; Sousa,Roberto Pequeno de; Fernandes,Patrícia Lianny de Oliveira.
In the sunflower, in addition to seed yield, it is of interest to evaluate number of leaves plant-1, head diameter, stem diameter and plant height, since these characteristics may be associated with seed yield or lodging. The objective of the work was to determine the optimal sample size (from which the experimental coefficient of variation, CV, can be established) for evaluation of these four characteristics. Fifteen cultivars were evaluated in an experimental design of randomized blocks with ten replications. The characteristics were evaluated using two sampling methods (in a single row of plants or in the two rows from the useable area of each plot) and sample sizes of from two to 18 sampling units, with an interval of two plants. In the two sampling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus L.; Plant height; Leaf number; Stem diameter; Head diameter.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100144
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Planting density and yield of cassava roots Rev. Ciênc. Agron.
Silva,Tiago Santos; Silva,Paulo Sérgio Lima e; Braga,Jéfferson Dantas; Silveira,Lindomar Maria da; Sousa,Roberto Pequeno de.
In Mata Fresca, an area located on the border of the states of Rio Grande do Norte and Ceará, in Brazil, small farmers have a source of income from the production of cassava roots, using planting densities of around 5,000 plants ha-1. This procedure might be helping to limit higher yields of the roots, since some studies have shown that it is possible to obtain higher yields of cassava using higher densities. The objective of this study was to evaluate the root yield and other characteristics of the cassava, as a response to planting density. The Vermelhinha cultivar was submitted to planting densities of from 5,000 to 21,000 plants ha-1, at intervals of 2,000 plants ha-1, in an experiment under irrigation. A completely randomized block design with four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manihot esculenta; Spacing; Plant populations.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000200014
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Tamanho e forma de parcelas para experimentos com girassol Rev. Ciênc. Agron.
Sousa,Roberto Pequeno de; Silva,Paulo Sérgio Lima e; Assis,Janilson Pinheiro de.
RESUMO Na experimentação agrícola, a utilização do tamanho e da forma adequada de parcela são técnicas experimentais importantes para aumentar a precisão do experimento. Assim, objetivou-se nesse trabalho determinar o tamanho e forma adequada de parcela para experimentação em campo com girassol. Para isso, o experimento foi conduzido em blocos completos casualizados com 14 cultivares de girassol em 10 repetições. As parcelas foram constituídas de quatro fileiras de seis metros de comprimento, espaçadas de 0,7 m e 0,3 m entre plantas. A área útil da parcela (7,56 m2), composta das duas fileiras centrais, foi dividida em 12 unidades básicas, cada uma constituída por três plantas na fileira (0,63 m2), obtendo-se o rendimento de grãos de girassol. O tamanho...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus L; Método de Hathewa; Método da informação relativa.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000400683
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Optimum plot size for experiments with the sunflower1 Rev. Ciênc. Agron.
Sousa,Roberto Pequeno de; Silva,Paulo Sérgio Lima e; Assis,Janilson Pinheiro de; Silva,Paulo Igor Barbosa e; Silva,Júlio César do Vale.
The aim of this study was to determine a suitable plot size for field experiments with the sunflower. An experiment was carried out in a randomised complete block design with 14 sunflower cultivars and 10 replications. The plots consisted of four rows, six metres in length, spaced 0.7 m apart with 0.3 m between plants. The working area of the plot (7.56 m2), consisting of the two central rows, was divided into 12 basic units, each consisting of three plants per row (0.63 m2), from where the yield of the sunflower seeds was obtained. Suitable plot size was estimated using the intraclass correlation coefficient method. The detectable difference between treatments was also estimated (d). The optimum plot size for the evaluation of grain yield in the sunflower...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helianthus annuus L.; Intraclass correlation coefficient; Breeding.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100170
Registros recuperados: 6
Primeira ... 1 ... Última
 

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