Densidades populacionais de milho em arranjos espaciais convencional e equidistante entre plantas

Brachtvogel, Elizeu Luiz; Pereira, Francisco Rafael da Silva; Cruz, Simério Carlos Silva; Bicudo, Sílvio José

doi:10.1590/s0103-84782009005000193

Cited by 45 publications

(46 citation statements)

References 13 publications

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“…Other authors reported yield reduction under higher plant populations (Silva et al, 2006;Demétrio et al, 2008;Sangoi et al, 2009). Probably, the required natural resources were not sufficient for all plants, and intraspecific plant competition compromised grain yield (Brachtvogel et al, 2009;Revoredo et al, 2009). In this case, seed costs increased without any extra grain yield benefits.…”

Section: Resultsmentioning

confidence: 96%

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Popping expansion and yield responses of popcorn cultivars under different row spacings and plant populations

Junior¹,

Cazetta

Barbosa

et al. 2013

Pesq. agropec. bras.

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-The objective of this work was to evaluate the agronomic traits and the popping expansion index of three Brazilian popcorn cultivars under different row spacings and plant populations. The trials were performed during two crop seasons, under field conditions. The experimental design used was a randomized complete block, in a split-split plot, with 27 treatments and four replicates. Treatments were represented in a triple factorial arrangement: three row spacings (0.40, 0.60, and 0.80 m), three plant populations (40,000, 60,000, and 80,000 plants per hectare), and three popcorn cultivars (IAC-TC 01, IAC 12, and Zelia). The increase in plant population causes a reduction in the number of grains per ear, lower prolificacy, and grain weight loss. Cultivar grain yield is affected by row spacing and popcorn plant population. Cultivar IAC 12 shows highest grain yield under row spacings of 0.40 and 0.60 m and plant population between 60,000 and 80,000 plants per hectare. The popping expansion index is not affected by row spacing or plant population.Index terms: Zea mays, plant density, popping expansion index, spatial arrangement. Capacidade de expansão e produtividade de cultivares de milho-pipoca sob diferentes espaçamentos entre as linhas e população de plantasResumo -O objetivo deste trabalho foi avaliar os caracteres agronômicos e o índice de capacidade de expansão de três cultivares de milho-pipoca brasileiras sob diferentes espaçamentos entre linhas e populações de plantas. Os ensaios foram realizados durante dois anos agrícolas, em condições de campo. Utilizou-se o delineamento experimental de blocos ao acaso, com parcelas subsubdivididas, 27 tratamentos e quatro repetições. Os tratamentos foram representados em arranjo fatorial triplo: três espaçamentos entre as linhas (0,40, 0,60 e 0,80 m), três populações de plantas (40.000, 60.000 e 80.000 plantas por hectare) e três cultivares de milho-pipoca (IAC-TC 01, IAC 12 e Zelia). O aumento da população de plantas ocasiona redução no número de grãos por espiga, menor prolificidade e perda de massa de grãos. O rendimento de grãos das cultivares é afetado pelos espaçamentos entre as linhas e a população de plantas de milho-pipoca. A cultivar IAC 12 apresenta maior produtividade de grãos sob os espaçamentos de 0,40 e 0,60 m e a população de plantas entre 60.000 e 80.000 plantas por hectare. O índice de capacidade de expansão não é afetado pelo espaçamento ou pela população de plantas.Termos para indexação: Zea mays, densidade de plantas, índice de capacidade de expansão, arranjo espacial.

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Section: Resultsmentioning

confidence: 96%

“…Furthermore, equidistant plant spacing can improve the use of environmental resources (Demétrio et al, 2008;Brachtvogel et al, 2009) through the reduction of intraspecific plant competition, increasing soil nutrient availability, water uptake, light, and CO 2 assimilation in the plant community (Sangoi et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Popping expansion and yield responses of popcorn cultivars under different row spacings and plant populations

Junior¹,

Cazetta

Barbosa

et al. 2013

Pesq. agropec. bras.

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“…Similarly, Silva et al (2010) found that the productive potential of irrigated maize was obtained at 90,000 plants per ha -1 . However, Brachtvogel et al (2012) reported a higher yield in populations of 65,000 plants per ha -1 without the use of supplemental irrigation. Thus, it appears that there are several studies of plant density, yet none of these studies considers the management of arrangements of rainfed and fully irrigated crops with intermediate water depth.…”

Section: Introductionmentioning

confidence: 93%

“…Currently, tests of maize seed by production companies are completed either in a completely dry or 100% irrigated system, without specifically examining partially irrigated plant populations (PEAKE et al, 2006). According to Brachtvogel et al (2009), population densities are between 70,000 and 100,000 plants ha -1 , depending on the company, location, and hybrid used. However, authors, such as Piana et al (2008) and Takasu et al (2014), suggested densities between 107,000 and 100,000, for fully irrigated systems.…”

Section: Introductionmentioning

confidence: 99%

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

et al. 2016

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-This study assessed the effect of different irrigation levels and plant densities on maize crops cultivated during the second season in the Western Border region of the State of Rio Grande do Sul. This work was conducted at the Federal Institute of Farroupilha -Alegrete Campus/RS -between January and June 2014. Treatments were arranged in a completely randomized 5 × 4 factorial design, with 3 replicates each. Irrigation of fixed amounts of water that were based on the evapotranspiration of the culture (Et c ): 0, 50, 75, 100, and 125% of Et c were applied at 5-day intervals. Four densities of plants were defined (4, 7, 10, and 13 plants m -2 ). We assessed number of maize ears per plant, number of grains per ear, aboveground dry matter, mass of 100 grains, harvest index, and grain productivity. The number of grains per ear, mass of 100 grains, and grain yield were influenced by irrigation levels. Plant density and water depth influenced the number of grains per ear, the mass of 100 grains, and grain productivity. The highest yield of winter maize grain was achieved with a combination of 13 plants per m -2 and an irrigation level of 100% of Et c . Specific densities of plants maximized the yield of maize at each irrigation level, demonstrating that choice of plant density is a critical variable in the second crop of maize, and significantly influences the components of production.

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“…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%

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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Densidades populacionais de milho em arranjos espaciais convencional e equidistante entre plantas

Cited by 45 publications

References 13 publications

Popping expansion and yield responses of popcorn cultivars under different row spacings and plant populations

Popping expansion and yield responses of popcorn cultivars under different row spacings and plant populations

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

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

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