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| Grego,Célia Regina; Vieira,Sidney Rosa; Xavier,Mauro Alexandre. |
| Tests to evaluate competition between plants, in general do not consider the soil spatial variability, nevertheless, the uniformity rarely is present and can not be assumed without verification. The aim of this work was to apply geostatistics to verify the spatial variability of the soil in an experimental field near Ribeirão Preto, SP, with sugarcane variety IACSP93-3046. Ninety seven geo-referenced samples, placed at distances of 10 m, were collected for soil chemical analysis, soil resistance to penetration and biometric evaluation of the sugar cane plant included number of tillers, stalk diameter, stalk height, estimated productivity (TSSe) and root density. Geostatistics has been applied by means of semivariogram, data interpolation via kriging and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geostatistics; Soil chemistry; Soil resistance to penetration; Root; Tillers. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500012 |
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| Xavier,Mauro Alexandre; Perecin,Dilermando; Alvim,Karen Rodrigues de Toledo; Landell,Marcos Guimarães de Andrade; Arantes,Flávio Cese. |
| O objetivo deste trabalho foi avaliar as famílias e destacar as progênies superiores de cana-de-açúcar oriundas de 38 cruzamentos biparentais para os seguintes atributos: tonelada de colmos por hectare (TCH), toneladas de biomassa por hectare (TBIOH), brix (% caldo da cana), teor de fibra, pureza, pol e açúcar total recuperável (ATR). Os dados foram analisados via modelos mistos REML/BLUP, em que o REML (Máxima Verossimilhança Restrita) permitiu estimar parâmetros genéticos e BLUP (Melhor Predição Linear Não Viciada) permitiu predizer os valores aditivos e genotípicos. A melhor família para os atributos TCH e TBIOH foi a 41, cujos parentais são as cultivares IACSP022019 x CTC9. Na seleção individual para TCH, a planta de n. 3 do bloco 2, do cruzamento 78... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp.; Modelos mistos; Melhoramento genético. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000300006 |
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| Landell,Marcos Guimarães de Andrade; Scarpari,Maximiliano Salles; Xavier,Mauro Alexandre; Anjos,Ivan Antônio dos; Baptista,Antônio Sampaio; Aguiar,Cláudio Lima de; Silva,Daniel Nunes da; Bidóia,Márcio Aurélio Pitta; Brancalião,Sandro Roberto; Bressiani,José Antônio; Campos,Marcelo Ferraz de; Miguel,Paulo Eduardo Martins; Silva,Thiago Nogueira da; Silva,Victor Hugo Pavelqueires da; Anjos,Luciana Oliveira Souza; Ogata,Bruna Harumi. |
| Sugarcane (Saccharum spp.) is an efficient and sustainable alternative for energy generation compared to non-renewable sources. Currently, during the mechanized harvest process, the straw left in the field can be used in part for the second generation ethanol and increasing the electric energy production. Thus, this study aimed to provide information on the potential for residual biomass cultivars of sugarcane cropping system. This study provides the following information: yield of straw, depending on the calculated leaf area index and the number of tillers per linear meter; primary energy production of several sugarcane genotypes; contribution of dry tops and leaves; biomass yield; and evaluation of fiber, cellulose, hemicellulose and lignin. Preliminary... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Straw; Genotypes; Composition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000500003 |
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| Landell,Marcos Guimarães de Andrade; Prado,Hélio do; Vasconcelos,Antônio Carlos Machado de; Perecin,Dilermando; Rossetto,Raffaella; Bidoia,Márcio Aurélio Pitta; Silva,Marcelo de Almeida; Xavier,Mauro Alexandre. |
| In spite of the great homogeneity found in the morphological characteristics of Oxisols, there is great chemical diversity in subsurface layers of these soils. Studies indicate that crop yield presents significant correlation with the chemical attributes of the subsurface, which, are more stable than attributes found in the plough layer, subject to greater alterations as a consequence of agricultural exploration. This work evaluated the effects of subsurface chemical attributes of Oxisols of the South Central region of Brazil, on the yield of sugarcane clones and of variety RB72454, during the first, second and third cropping cycles. Productivity data were obtained between 1993 and 1998. Soils were characterized in terms of their mechanical analysis and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yield; Soils; Linear models; Chemical analysis. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400020 |
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