Manejos de cobertura vegetal e velocidades de operação em condições de semeadura e produtividade de milho

Trogello, Emerson; Modolo, Alcir José; Scarsi, Marina; Silva, Cristiano L. da; Adami, Paulo Fernando; Dallacort, Rivanildo

doi:10.1590/s1415-43662013000700015

Cited by 22 publications

(28 citation statements)

References 25 publications

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“…Various factors can affect the uniform arrangement of corn plants, among which the inadequate seed classification with respect to shape, mass and size, the incompatibility between seed size/shape and the discs of sowing machines, inadequate regulation of sowing machine, seed-conducting tubes and the excessive velocity during sowing are the most common causes for the occurrences of non-uniform stands of corn (Trogello et al, 2013). In these cases, there are segments in the rows where plants are very close to each other and long segments without plants.…”

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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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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“…The depth of seed placement is specific for each species and, when adequate, leads to uniform germination and seedling emergence (Sousa et al, 2007;Trogello et al, 2013). Excessive sowing depths can impede the still fragile seedling from emerging from the soil.…”

Section: Introductionmentioning

confidence: 99%

The effect of longitudinal distribution and seed depth on grain yield of common bean

2018

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-The aim of this study was to quantify the longitudinal distribution of plants in the row and seed depth and their effects on hypocotyl length and diameter and on yield components and grain yield of common bean, specifically the cultivar BRSMG Realce in a Latossolo soil in the Cerrado (Brazilian tropical savanna). The data on plant distances in the row were obtained in the field with the aid of a measuring tape in four rows of 2.5 m length. Seed depth was determined by measuring the length of the hypocotyl that was within the soil after pulling up the plant. Hypocotyl diameter was evaluated at ground level using a digital caliper. Descriptive (univariate) statistical analysis was applied to the data. Linear correlations were established among distribution of distance between plants in the row, the depth of sowing, the characteristics of the hypocotyls, and grain yield data of common bean. Negative linear regression was observed between grain yield with sowing depth, and positive linear regression between hypocotyl diameter and longitudinal spacing between plants in the row. In the sowing process, special attention should be given to seed distribution in the row to avoid subsequent uneven plant distribution and to seed depth to avoid yield loss.Index terms: Phaseolus vulgaris, hypocotyl diameter, hypocotyl length, plant spacing, sowing quality.Distribuição longitudinal e profundidade da semente afetando a produtividade de grãos do feijão-comum RESUMO -Objetivou-se com o presente estudo quantificar a distribuição longitudinal de plantas na linha e profundidade da semente no solo e seus efeitos no comprimento e diâmetro do hipocótilo, nos componentes de produção e produtividade de grãos de feijão-comum, cultivar BRSMG Realce, em latossolo do Cerrado. Os dados da distância entre plantas na linha foram obtidos em campo com o auxílio de trena em quatro linhas de feijão de 2,5 m de comprimento. A profundidade de semeadura foi determinada medindo-se o comprimento do hipocótilo dentro do solo após o arranquio da planta. O diâmetro do hipocótilo foi avaliado ao nível do solo utilizando-se paquímetro digital. Os dados foram submetidos à análise estatística descritiva (univariada). Estabeleceram-se correlações lineares entre a distribuição da distância entre plantas na linha, da profundidade de semeadura e as características do hipocótilo e dados de produtividade de grãos do feijão-comum. Observou-se regressão linear negativa da produtividade de grãos com profundidade de semeadura e positiva com diâmetro do hipocótilo e espaçamento longitudinal entre plantas na linha. Especial atenção deve ser dada no processo de semeadura para evitar distribuição desuniforme de plantas da linha de semeadura e na profundidade da semente para evitar reduções na produtividade.Termos para indexação: Phaseolus vulgaris, comprimento do hipocótilo, diâmetro do hipocótilo, espaçamento entre plantas, qualidade de plantio.1

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“…The optimum speed of mechanized sowing increases the yield for corn [2][3][4][5][6][7][8][9], sunflower [10], soy [11][12][13], and wheat [14]. In references [4][5][6][7][8][9]12], yield has been favored with the lowest sowing speeds.…”

Section: Introductionmentioning

confidence: 99%

“…In references [4][5][6][7][8][9]12], yield has been favored with the lowest sowing speeds. In terms of rice sowing speed, ElKhateeb and Khodeir [15] evaluated forward speed and performance rice planting machines (mechanical drilling and mechanical transplanting).…”

Section: Introductionmentioning

confidence: 99%

Incidence of the mechanized sowing speed in irrigated rice

González-Betancourt

Alonso-Fernández

Mayorga-Ruíz

2017

DYNA

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This paper presents some experimental results to determine the incidence of mechanized sowing speed in the development and growth of rice in El Espinal-Tolima. Using a completely randomized design and a seed density of 104.5 ± 3.3 kg/ha, plots were sown in three replicates at 3.31 ± 0.05 km/h, 5.13 ± 0.18 Km/h, and 6.98 ± 0.24 km/h. Plant population, plant weight, dry matter, moisture content, and yield showed statistically significant differences with respect to sowing speed. This research found that the sowing speed has a proportional relationship with: a) the percentage of plants grouped in their roots, b) the number of non-productive tillers, c) the fuel consumed rate, d) uncovered seed, e) effective field capacity. The sowing speed of 5.13 ± 0.18 km/h was achieved by plants with a higher number of panicles per m 2 and yield: this is optimal.Keywords: Sowing speed; irrigated rice; rice profitability Incidencia de la velocidad de siembra mecanizada en el arroz de riego Resumen Se determinó la incidencia de la velocidad mecanizada de siembra en el desarrollo y crecimiento del arroz en El Espinal-Tolima. Utilizando un diseño completamente al azar y una densidad de semilla de 104.5 ± 3.3 kg/ha, se sembraron parcelas en tres repeticiones a 3.31 ± 0.05 km/h, 5.13 ± 0.18 Km/h y 6.98 ± 0.24 km/h. La población de las plantas, el peso de la planta, la materia seca, el contenido de humedad y el rendimiento mostraron diferencias estadísticamente significativas con respecto a la velocidad de siembra. Se encontró que la velocidad de siembra tiene una relación proporcional con: a) el porcentaje de plantas agrupadas en sus raíces, b) los tallos no productivos, c) el combustible consumido, d) las semillas descubiertas, e) la capacidad de campo efectiva. La velocidad de siembra de 5.13 ± 0.18 km/h logro plantas con mayor número de panículas por m 2 y rendimiento, lo cual es óptimo.Palabras claves: Velocidad de siembra; arroz de riego; rentabilidad del arroz.

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Manejos de cobertura vegetal e velocidades de operação em condições de semeadura e produtividade de milho

Cited by 22 publications

References 25 publications

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

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

The effect of longitudinal distribution and seed depth on grain yield of common bean

Incidence of the mechanized sowing speed in irrigated rice

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