2001
DOI: 10.1590/s0100-204x2001000100009
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Resposta de híbridos simples de milho à redução do espaçamento entre linhas

Abstract: Response of maize single-cross hybrids to reduced row spacingAbstract _ The objective of this work was to determine the effects of using narrow row spacing on grain yield, grain components and on other agronomic traits of maize single-cross hybrids. Two experiments were conducted in the state of Rio Grande do Sul, Brazil. In the 1997/98 growing season, treatments were composed by two single-cross hybrids (Cargill 901 and Braskalb XL 212) and four row spacings (40, 60, 80 and 100 cm). In the 1998/99 growing sea… Show more

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Cited by 41 publications
(66 citation statements)
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References 12 publications
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“…Thus, there were decreases of 2,822.50, 1,922.50, 1,297.50 and 430.00 kg ha -1 of grains for the CV values of 80, 60, 40 and 20%, respectively (Figure 3). The highest yields observed in more uniform, or with minimum variation, sowings resulted from the better use of solar radiation interception and acquisition of resources like water and soil nutrients, as well as from the decrease in the competition between plants along the row (Argenta et al, 2001). These results agree with those reported by Nielsen (2004) and Doerge et al (2004) in the United States, who observed decreases in corn grain yield caused by the increase in non-uniformity of spatial distribution of plants along the row.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Thus, there were decreases of 2,822.50, 1,922.50, 1,297.50 and 430.00 kg ha -1 of grains for the CV values of 80, 60, 40 and 20%, respectively (Figure 3). The highest yields observed in more uniform, or with minimum variation, sowings resulted from the better use of solar radiation interception and acquisition of resources like water and soil nutrients, as well as from the decrease in the competition between plants along the row (Argenta et al, 2001). These results agree with those reported by Nielsen (2004) and Doerge et al (2004) in the United States, who observed decreases in corn grain yield caused by the increase in non-uniformity of spatial distribution of plants along the row.…”
Section: Resultsmentioning
confidence: 99%
“…The arrangement of plants can interfere with corn growth and development through variations in population density, spacing between rows and in spatial and temporal distribution of individuals along the row (Argenta et al, 2001;BrachtvogeL et al, 2009). Obtaining high grain yields in corn depends on the duration of the period of interception of incident solar radiation, use efficiency of the radiation intercepted during photosynthesis and adequate distribution of the produced photoassimilates to different plant demands (Argenta et al, 2003;Marchão et al, 2005).…”
Section: Introductionmentioning
confidence: 99%
“…Assim se faz necessária a busca por novas informações sobre as mudanças que essa prática proporcionará à cultura. Argenta et al (2001) justificam reavaliar as recomendações de espaçamento e densidades de semeadura para a cultura do milho, em virtude das modificações introduzidas nos genótipos mais recentes, como menor estatura das plantas e altura de inserção da espiga, menor esterilidade das plantas, menor duração do período entre pendoamento e espigamento, inserção de folhas mais eretas e elevado potencial produtivo.…”
Section: Introductionunclassified
“…Isso resulta em redução da disponibilidade de radiação solar para a porção inferior do dossel. Híbridos com arquitetura moderna, ou seja, com menor estatura, menor número de folhas e folhas mais eretas, possibilitam maior penetração de radiação para a porção inferior do dossel, reduzindo a competição intra-especí-fica mesmo com utilização de densidades mais elevadas (Almeida et al, 2000;Argenta et al, 2001).…”
Section: Introductionunclassified
“…Alguns trabalhos evidenciam que espaça-mentos reduzidos, até determinado limite, mantendo-se as mesmas populações de plantas por unidade de área, propiciam maiores rendimentos de grãos (Argenta et al, 2001;Shrestha et al, 2001;Johnson & Hoverstad, 2002;Strieder, 2006). Isso ocorre pela distribuição mais uniforme de plantas cultivadas, que resulta em maior interceptação de radiação, melhor aproveitamento da água e dos nutrientes e menor evaporação de água.…”
Section: Introductionunclassified