Perfilhamento, área foliar e produtividade do milho sob diferentes arranjos espaciais

Sangoi, Luís; Schweitzer, Cleber; Silva, Paulo Regis Ferreira da; Schmitt, Amauri; Vargas, Vitor Paulo; Casa, Ricardo Trezzi; Souza, Clóvis Arruda

doi:10.1590/s0100-204x2011000600006

Cited by 34 publications

(34 citation statements)

References 18 publications

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“…However, the spacing did not affect the corn grain yield in a study recently done by Sangoi et al (2011), because according to Argenta et al (2001) and Strieder et al (2008) the effects of this cultural practice depend on the hybrid and the level of technology used.…”

Section: Resultsmentioning

confidence: 81%

“…However, the increase in N rates requires the split of nitrogen fertilization to enhance the increase in yield (Von Pinho et al, 2008). The use of higher nitrogen rates, adequate plant density and sowing speed may increase the corn yield without changing the spacing between lines (Alvarez et al, 2006;Trezzi et al, 2008;Alvarez et al, 2009;Kappes et al, 2011;Sangoi et al, 2011). The reduction in spacing requires suitable platforms for harvesting, therefore the farmer needs to modify or acquire new platforms to harvest in reduced spacings , which results in increased costs.…”

Section: Resultsmentioning

confidence: 99%

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Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

et al. 2014

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RESUMOEspaçamento, densidade populacional e adubação nitrogenada na cultura do milho O objetivo deste trabalho foi avaliar os componentes de produção, teor de nitrogênio (N) no tecido foliar e produtividade de grãos na cultura do milho em função de diferentes espaçamentos entre linhas, densidade populacional e doses de adubação nitrogenada em cobertura. O experimento foi conduzido no município de Toledo-PR, no ano agrícola de 2005/2006, em área de Latossolo Vermelho Eutroférrico sob sistema de semeadura direta, com o híbrido simples AG 8021. O delineamento experimental utilizado foi em blocos casualizados, com quatro repetições e tratamentos dispostos em parcelas subsubdivididas. Nas parcelas foram alocados os espaçamentos entre linhas (0,45 e 0,90 m), nas subparcelas foram alocadas as populações de plantas de milho (60 mil e 80 mil plantas ha -1 ) e nas subsubparcelas foram alocadas as doses de nitrogênio em cobertura (80, 100, 120 e 140 kg ha -1 de N), utilizando-se como fonte de nitrogênio a ureia. A elevação da população de plantas de 60 mil para 80 mil plantas ha -1 , assim como a aplicação de doses crescentes da adubação nitrogenada em cobertura proporcionaram incremento nos componentes de produção. A aplicação de N em cobertura proporciona incremento no teor de N foliar e na produtividade de grãos para o espaçamento 0,45 m e 0,90 m. O espaçamento de 0,45 m alcançou produtividade superior ao espaçamento 0,90 m. Com 60 mil plantas a produtividade foi maior do que com 80 mil plantas no espaçamento de 0,90 m, enquanto que com 0,45 m não houve diferença quanto à densidade populacional.Palavras-chave: arranjo de plantas, Zea mays L., ureia, nitrogênio em cobertura. Spacing, population density and nitrogen fertilization in corn grown in an OxisoilThe objective of this study was to evaluate yield components, leaf nitrogen content and grain yield in corn as affected by row spacing, plant density and nitrogen topdressing. The experiment was conducted with the singlecross hybrid AG 8021, in the municipality of Toledo-PR, in an Oxisoil under no-tillage system, in the crop year 2005/ 2006. The experiment was arranged in a randomized block design and treatments in split-split-plots, with four replications. The two row spacings (0.45 and 0.90 m) were allocated in the main plots, the two plant densities (60,000 and 80,000 plants ha -1 ) were allocated in the subplots and the three nitrogen rates (80, 100, 120 and 140 kg ha -1 N) were allocated in the sub-subplots. Topdress nitrogen was applied using urea as N source. The rise of the plant population from 60,000 to 80,000 plants ha -1 and the application of topdress nitrogen resulted in increased production components. The application of topdress fertilization provided increase in leaf N content and grain yield for the spacings 0.45 m and 0.90 m. Yield was higher in the spacing 0.45 m than 0.90 m. Yield was higher with 60,000 plants than with 80,000 plants at 0.90 m, while at 0.45 m there was no difference in relation to the plant density.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

et al. 2014

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“…Hiper and super early hybrids with erect leaves and short plant height are more responsive to crowding than early hybrids with flagged leaves (Strieder et al, 2008). When grown in low densities, P30F53YH has the ability to emit productive tillers which can also contribute to decrease plant density effects on grain yield (Sangoi et al, 2011). Table 2.…”

Section: Resultsmentioning

confidence: 99%

Growth regulator and maize response to the increase in plant density

Leolato

Sangoi

Durli

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of application of the growth regulator Trinexapac-ethyl on maize response to the increase in plant density at two sowing dates. A field experiment was carried out in the municipality of Lages, state of Santa Catarina, Brazil, during the 2014/2015 and 2015/2016 growing seasons. Two sowing dates (10/15 -preferential, and 12/5 -late), four plant densities (5, 7, 9, and 11 plants m -2 ), with and without Trinexapac-ethyl application, were tested. The growth regulator was sprayed at a rate of 150 g a.i. ha -1 , when hybrid P30F53YH was at the V5 and V10 growth stages. The spraying of Trinexapac-ethyl decreased the stem length above the ear insertion node at both growing seasons. Grain yield ranged from 11,422 to 14,805 kg ha -1 , and increased in a quadratic way with the increment in plant density. The highest yields were reached when maize was sown in October. The spraying of Trinexapac-ethyl did not affect grain yield, but decreased the 1,000 kernels mass at both sowing dates. The use of Trinexapac-ethyl does not enhance grain yield of maize hybrid P30F53YH at crowded stands in response to the densification, regardless of sowing time.

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“…It should be pointed out that plants subjected to the highest levels of spatial non-uniformity showed the lowest values of yield components and that the adjusted linear models showed irreversible damages on plants. Therefore, it is not sufficient to establish the desired population; the spacing between plants in the row becomes essential to obtain high grain yields (Sangoi et al, 2011;2012).…”

Section: Resultsmentioning

confidence: 99%

Production components of corn as function of seed distribution along the planting row

Silva

Cunha

Almeida

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C THigh corn yields in high-tech systems are related to proper crop implementation. This study aimed to evaluate the effects of variability in the distribution of seeds along the planting row on corn production components. The study was conducted under Cerrado conditions in the municipality of Urutaí, GO, Brazil. The experimental design was randomized blocks in a 5 x 2 factorial scheme, with four replicates. The effects of five coefficients of variation (0, 20, 40, 60 and 80%) of non-uniformity in the spatial distribution of seeds along the planting row of two corn hybrids (P30F53HX and P3646HX) were evaluated. No interactions were observed for the analysed corn variables. However, as the non-uniformity in seed distribution along the planting row increased, stalk diameter, hundred-grain weight, number of rows per ear, number of kernels per row and ear length decreased. Additionally, linear reductions were observed in corn grain yield with the increase in the coefficient of variation of the spatial distribution of seeds along the planting row. Between the hybrids, the 30F53HX showed higher hundred-grain weight.

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Perfilhamento, área foliar e produtividade do milho sob diferentes arranjos espaciais

Cited by 34 publications

References 18 publications

Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

Growth regulator and maize response to the increase in plant density

Production components of corn as function of seed distribution along the planting row

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